Ohne Titel

The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Tran, Thi Bich Hue [verfasserIn] Huguet, Patrice [verfasserIn] Morin, Arnaud [verfasserIn] Robitzer, Mike [verfasserIn] Deabate, Stefano [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management

Übergeordnetes Werk:	Enthalten in: Electrochimica acta - New York, NY [u.a.] : Elsevier, 1959, 372
Übergeordnetes Werk:	volume:372

DOI / URN:	10.1016/j.electacta.2021.137904

Katalog-ID:	ELV005526310

Internformat


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520			\|a The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C.
650		4	\|a Polymer electrolyte membrane fuel cell
650		4	\|a Nafion
650		4	\|a Gas flow-field design
650		4	\|a Water management
700	1		\|a Huguet, Patrice \|e verfasserin \|0 (orcid)0000-0002-9881-7494 \|4 aut
700	1		\|a Morin, Arnaud \|e verfasserin \|4 aut
700	1		\|a Robitzer, Mike \|e verfasserin \|0 (orcid)0000-0001-5091-6605 \|4 aut
700	1		\|a Deabate, Stefano \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|t Electrochimica acta \|d New York, NY [u.a.] : Elsevier, 1959 \|g 372 \|h Online-Ressource \|w (DE-627)300897561 \|w (DE-600)1483548-4 \|w (DE-576)094752451 \|x 1873-3859 \|7 nnns
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936	b	k	\|a 35.00 \|j Chemie: Allgemeines
951			\|a AR
952			\|d 372

Indexfelder

author_variant	t b h t tbh tbht p h ph a m am m r mr s d sd
matchkey_str	article:18733859:2021----::
hierarchy_sort_str	2021
bklnumber	35.00
publishDate	2021
allfields	10.1016/j.electacta.2021.137904 doi (DE-627)ELV005526310 (ELSEVIER)S0013-4686(21)00194-8 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Tran, Thi Bich Hue verfasserin aut 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C. Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management Huguet, Patrice verfasserin (orcid)0000-0002-9881-7494 aut Morin, Arnaud verfasserin aut Robitzer, Mike verfasserin (orcid)0000-0001-5091-6605 aut Deabate, Stefano verfasserin aut Enthalten in Electrochimica acta New York, NY [u.a.] : Elsevier, 1959 372 Online-Ressource (DE-627)300897561 (DE-600)1483548-4 (DE-576)094752451 1873-3859 nnns volume:372 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 372
spelling	10.1016/j.electacta.2021.137904 doi (DE-627)ELV005526310 (ELSEVIER)S0013-4686(21)00194-8 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Tran, Thi Bich Hue verfasserin aut 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C. Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management Huguet, Patrice verfasserin (orcid)0000-0002-9881-7494 aut Morin, Arnaud verfasserin aut Robitzer, Mike verfasserin (orcid)0000-0001-5091-6605 aut Deabate, Stefano verfasserin aut Enthalten in Electrochimica acta New York, NY [u.a.] : Elsevier, 1959 372 Online-Ressource (DE-627)300897561 (DE-600)1483548-4 (DE-576)094752451 1873-3859 nnns volume:372 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 372
allfields_unstemmed	10.1016/j.electacta.2021.137904 doi (DE-627)ELV005526310 (ELSEVIER)S0013-4686(21)00194-8 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Tran, Thi Bich Hue verfasserin aut 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C. Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management Huguet, Patrice verfasserin (orcid)0000-0002-9881-7494 aut Morin, Arnaud verfasserin aut Robitzer, Mike verfasserin (orcid)0000-0001-5091-6605 aut Deabate, Stefano verfasserin aut Enthalten in Electrochimica acta New York, NY [u.a.] : Elsevier, 1959 372 Online-Ressource (DE-627)300897561 (DE-600)1483548-4 (DE-576)094752451 1873-3859 nnns volume:372 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 372
allfieldsGer	10.1016/j.electacta.2021.137904 doi (DE-627)ELV005526310 (ELSEVIER)S0013-4686(21)00194-8 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Tran, Thi Bich Hue verfasserin aut 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C. Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management Huguet, Patrice verfasserin (orcid)0000-0002-9881-7494 aut Morin, Arnaud verfasserin aut Robitzer, Mike verfasserin (orcid)0000-0001-5091-6605 aut Deabate, Stefano verfasserin aut Enthalten in Electrochimica acta New York, NY [u.a.] : Elsevier, 1959 372 Online-Ressource (DE-627)300897561 (DE-600)1483548-4 (DE-576)094752451 1873-3859 nnns volume:372 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 372
allfieldsSound	10.1016/j.electacta.2021.137904 doi (DE-627)ELV005526310 (ELSEVIER)S0013-4686(21)00194-8 DE-627 ger DE-627 rda eng 540 DE-600 35.00 bkl Tran, Thi Bich Hue verfasserin aut 2021 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C. Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management Huguet, Patrice verfasserin (orcid)0000-0002-9881-7494 aut Morin, Arnaud verfasserin aut Robitzer, Mike verfasserin (orcid)0000-0001-5091-6605 aut Deabate, Stefano verfasserin aut Enthalten in Electrochimica acta New York, NY [u.a.] : Elsevier, 1959 372 Online-Ressource (DE-627)300897561 (DE-600)1483548-4 (DE-576)094752451 1873-3859 nnns volume:372 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 35.00 Chemie: Allgemeines AR 372
language	English
source	Enthalten in Electrochimica acta 372 volume:372
sourceStr	Enthalten in Electrochimica acta 372 volume:372
format_phy_str_mv	Article
bklname	Chemie: Allgemeines
institution	findex.gbv.de
topic_facet	Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management
dewey-raw	540
isfreeaccess_bool	false
container_title	Electrochimica acta
authorswithroles_txt_mv	Tran, Thi Bich Hue @@aut@@ Huguet, Patrice @@aut@@ Morin, Arnaud @@aut@@ Robitzer, Mike @@aut@@ Deabate, Stefano @@aut@@
publishDateDaySort_date	2021-01-01T00:00:00Z
hierarchy_top_id	300897561
dewey-sort	3540
id	ELV005526310
language_de	englisch
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Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. 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author	Tran, Thi Bich Hue
spellingShingle	Tran, Thi Bich Hue ddc 540 bkl 35.00 misc Polymer electrolyte membrane fuel cell misc Nafion misc Gas flow-field design misc Water management
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topic_title	540 DE-600 35.00 bkl Polymer electrolyte membrane fuel cell Nafion Gas flow-field design Water management
topic	ddc 540 bkl 35.00 misc Polymer electrolyte membrane fuel cell misc Nafion misc Gas flow-field design misc Water management
topic_unstemmed	ddc 540 bkl 35.00 misc Polymer electrolyte membrane fuel cell misc Nafion misc Gas flow-field design misc Water management
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abstract	The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C.
abstractGer	The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C.
abstract_unstemmed	The energy conversion efficiency of the polymer electrolyte membrane fuel cell needs improved thermal and water managements. Here, the actual water concentration of the NafionⓇ membrane in the fuel cell working at constant stoichiometry and relative humidity is measured by operando Raman microspectroscopy. Through-plane water content profiles with μm resolution are obtained across the membrane at locations corresponding to the gas distribution channel and under the lands for the current collection, at the center of the active surface. The influence of the cell working temperature, of the current density and of the geometry of the gas feed channel (serpentine vs. parallel) are investigated. The combined measurement of the cell resistance and mass balance allow to establish relationships between the local water distribution throughout the cell and electrochemical performances. The membrane water content lowers with the increase of both current density and temperature regardless to the flow-field channel geometry. The membrane dehydration with current is ascribed to the concomitant raise of pressure losses and the spontaneous increase of the fuel cell inner temperature, with the last prevailing when the cell is managed at low temperatures. In that case, the distribution of water at the channel/lands scale has a distinct effect on the electrochemical behavior and performance of the cell. The parallel geometry exhibits easier accumulation of water at the under-lands location, which induces detrimental local water condensation but limits the membrane dehydration with current. The larger pressure losses generated by the serpentine geometry allow less inhomogeneous water distribution at the channel/lands scale, lower mass-transport over-voltage and, thus, a more efficient use of the active surface. The cell electrochemical behavior results from the interplay between the hydration of the membrane and the repartition of water, in such a way that the parallel geometry exhibits better performances at high current density when the cell is managed at low temperature. The serpentine design shows better performances for a large number of temperature and current conditions, namely when the cell is operated at the standard t = 80 °C.
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