A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation
Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. How...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Ding, Liming [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method - Xiao, Hong ELSEVIER, 2013, the international journal on the science and technology of electrochemical energy systems, New York, NY [u.a.] |
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| Übergeordnetes Werk: |
volume:455 ; year:2020 ; day:15 ; month:04 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.jpowsour.2020.227965 |
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ELV049812246 |
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| 245 | 1 | 0 | |a A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation |
| 264 | 1 | |c 2020transfer abstract | |
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| 520 | |a Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. | ||
| 520 | |a Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. | ||
| 650 | 7 | |a Polybenzimidazoles |2 Elsevier | |
| 650 | 7 | |a Enhanced proton conductivity |2 Elsevier | |
| 650 | 7 | |a Protonation |2 Elsevier | |
| 650 | 7 | |a Proton exchange membrane |2 Elsevier | |
| 650 | 7 | |a Dissolution |2 Elsevier | |
| 700 | 1 | |a Wang, Yahui |4 oth | |
| 700 | 1 | |a Wang, Lihua |4 oth | |
| 700 | 1 | |a Zhao, Zhiping |4 oth | |
| 700 | 1 | |a He, Min |4 oth | |
| 700 | 1 | |a Song, Yanlin |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier |a Xiao, Hong ELSEVIER |t Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method |d 2013 |d the international journal on the science and technology of electrochemical energy systems |g New York, NY [u.a.] |w (DE-627)ELV00098745X |
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10.1016/j.jpowsour.2020.227965 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000954.pica (DE-627)ELV049812246 (ELSEVIER)S0378-7753(20)30268-8 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Ding, Liming verfasserin aut A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Polybenzimidazoles Elsevier Enhanced proton conductivity Elsevier Protonation Elsevier Proton exchange membrane Elsevier Dissolution Elsevier Wang, Yahui oth Wang, Lihua oth Zhao, Zhiping oth He, Min oth Song, Yanlin oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:455 year:2020 day:15 month:04 pages:0 https://doi.org/10.1016/j.jpowsour.2020.227965 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 455 2020 15 0415 0 |
| spelling |
10.1016/j.jpowsour.2020.227965 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000954.pica (DE-627)ELV049812246 (ELSEVIER)S0378-7753(20)30268-8 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Ding, Liming verfasserin aut A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Polybenzimidazoles Elsevier Enhanced proton conductivity Elsevier Protonation Elsevier Proton exchange membrane Elsevier Dissolution Elsevier Wang, Yahui oth Wang, Lihua oth Zhao, Zhiping oth He, Min oth Song, Yanlin oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:455 year:2020 day:15 month:04 pages:0 https://doi.org/10.1016/j.jpowsour.2020.227965 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 455 2020 15 0415 0 |
| allfields_unstemmed |
10.1016/j.jpowsour.2020.227965 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000954.pica (DE-627)ELV049812246 (ELSEVIER)S0378-7753(20)30268-8 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Ding, Liming verfasserin aut A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Polybenzimidazoles Elsevier Enhanced proton conductivity Elsevier Protonation Elsevier Proton exchange membrane Elsevier Dissolution Elsevier Wang, Yahui oth Wang, Lihua oth Zhao, Zhiping oth He, Min oth Song, Yanlin oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:455 year:2020 day:15 month:04 pages:0 https://doi.org/10.1016/j.jpowsour.2020.227965 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 455 2020 15 0415 0 |
| allfieldsGer |
10.1016/j.jpowsour.2020.227965 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000954.pica (DE-627)ELV049812246 (ELSEVIER)S0378-7753(20)30268-8 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Ding, Liming verfasserin aut A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Polybenzimidazoles Elsevier Enhanced proton conductivity Elsevier Protonation Elsevier Proton exchange membrane Elsevier Dissolution Elsevier Wang, Yahui oth Wang, Lihua oth Zhao, Zhiping oth He, Min oth Song, Yanlin oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:455 year:2020 day:15 month:04 pages:0 https://doi.org/10.1016/j.jpowsour.2020.227965 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 455 2020 15 0415 0 |
| allfieldsSound |
10.1016/j.jpowsour.2020.227965 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000954.pica (DE-627)ELV049812246 (ELSEVIER)S0378-7753(20)30268-8 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Ding, Liming verfasserin aut A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. Polybenzimidazoles Elsevier Enhanced proton conductivity Elsevier Protonation Elsevier Proton exchange membrane Elsevier Dissolution Elsevier Wang, Yahui oth Wang, Lihua oth Zhao, Zhiping oth He, Min oth Song, Yanlin oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:455 year:2020 day:15 month:04 pages:0 https://doi.org/10.1016/j.jpowsour.2020.227965 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 455 2020 15 0415 0 |
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a simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation |
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A simple and effective method of enhancing the proton conductivity of polybenzimidazole proton exchange membranes through protonated polymer during solvation |
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Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. |
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Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. |
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Acid-doped polybenzimidazole (PBI) membranes are proton exchange membranes (PEM) which show promise for use in vanadium redox flow batteries (VRFBs). Fluorine-containing PBI membranes can withstand the strong acidity and oxidative electrolytes of VRFB due to their excellent oxidative resistance. However, the proton conductivity of dense fluorine-containing PBI membranes is moderate. In this work, the protic solvent methanesulfonic acid (MSA) was used to enhance the proton conductivity of hexafluoroisopropylidene group containing PBI (6FPBI) PEM and the performance of this membrane (6FPBI-MSA) was compared with that of a membrane (6FPBI-DMAc) that was manufactured using the aprotic solvent N,N-Dimethylacetamide (DMAc). MSA can protonate the nitrogen atoms in imidazole groups during polymer solvation, and the positively charged nitrogen atoms prevent the formation of intermolecular hydrogen bonds among polymers by electrostatic repulsion. Hence, the free volume and amorphous state of the 6FPBI-MSA were superior to those of 6FPBI-DMAc membrane. The proton conductivity of the 6FPBI-MSA membrane (8.371 mS cm−1) is significantly higher than that of the 6FPBI-DMAc membrane (4.904 mS cm−1). Correspondingly, the energy efficiency of the 6FPBI-MSA membrane is superior to that of the 6FPBI-DMAc membrane at various current densities. Protonation of 6FPBI using MSA during dissolution is an effective way to enhance its proton conductivity. |
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