Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes
In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are benefic...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Shi, Kaiyuan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2013transfer abstract |
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| Schlagwörter: |
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| Umfang: |
8 |
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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:240 ; year:2013 ; day:15 ; month:10 ; pages:42-49 ; extent:8 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.jpowsour.2013.03.163 |
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| 245 | 1 | 0 | |a Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes |
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| 520 | |a In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. | ||
| 520 | |a In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. | ||
| 650 | 7 | |a Stability |2 Elsevier | |
| 650 | 7 | |a Supercapacitor |2 Elsevier | |
| 650 | 7 | |a Capacitance |2 Elsevier | |
| 650 | 7 | |a Retention |2 Elsevier | |
| 650 | 7 | |a Electropolymerization |2 Elsevier | |
| 650 | 7 | |a Polypyrrole |2 Elsevier | |
| 700 | 1 | |a Zhitomirsky, Igor |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.2013.03.163 doi GBVA2013012000022.pica (DE-627)ELV011582510 (ELSEVIER)S0378-7753(13)00557-0 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Shi, Kaiyuan verfasserin aut Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes 2013transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. Stability Elsevier Supercapacitor Elsevier Capacitance Elsevier Retention Elsevier Electropolymerization Elsevier Polypyrrole Elsevier Zhitomirsky, Igor 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:240 year:2013 day:15 month:10 pages:42-49 extent:8 https://doi.org/10.1016/j.jpowsour.2013.03.163 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 240 2013 15 1015 42-49 8 045F 620 |
| spelling |
10.1016/j.jpowsour.2013.03.163 doi GBVA2013012000022.pica (DE-627)ELV011582510 (ELSEVIER)S0378-7753(13)00557-0 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Shi, Kaiyuan verfasserin aut Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes 2013transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. Stability Elsevier Supercapacitor Elsevier Capacitance Elsevier Retention Elsevier Electropolymerization Elsevier Polypyrrole Elsevier Zhitomirsky, Igor 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:240 year:2013 day:15 month:10 pages:42-49 extent:8 https://doi.org/10.1016/j.jpowsour.2013.03.163 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 240 2013 15 1015 42-49 8 045F 620 |
| allfields_unstemmed |
10.1016/j.jpowsour.2013.03.163 doi GBVA2013012000022.pica (DE-627)ELV011582510 (ELSEVIER)S0378-7753(13)00557-0 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Shi, Kaiyuan verfasserin aut Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes 2013transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. Stability Elsevier Supercapacitor Elsevier Capacitance Elsevier Retention Elsevier Electropolymerization Elsevier Polypyrrole Elsevier Zhitomirsky, Igor 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:240 year:2013 day:15 month:10 pages:42-49 extent:8 https://doi.org/10.1016/j.jpowsour.2013.03.163 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 240 2013 15 1015 42-49 8 045F 620 |
| allfieldsGer |
10.1016/j.jpowsour.2013.03.163 doi GBVA2013012000022.pica (DE-627)ELV011582510 (ELSEVIER)S0378-7753(13)00557-0 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Shi, Kaiyuan verfasserin aut Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes 2013transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. Stability Elsevier Supercapacitor Elsevier Capacitance Elsevier Retention Elsevier Electropolymerization Elsevier Polypyrrole Elsevier Zhitomirsky, Igor 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:240 year:2013 day:15 month:10 pages:42-49 extent:8 https://doi.org/10.1016/j.jpowsour.2013.03.163 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 240 2013 15 1015 42-49 8 045F 620 |
| allfieldsSound |
10.1016/j.jpowsour.2013.03.163 doi GBVA2013012000022.pica (DE-627)ELV011582510 (ELSEVIER)S0378-7753(13)00557-0 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Shi, Kaiyuan verfasserin aut Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes 2013transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. Stability Elsevier Supercapacitor Elsevier Capacitance Elsevier Retention Elsevier Electropolymerization Elsevier Polypyrrole Elsevier Zhitomirsky, Igor 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:240 year:2013 day:15 month:10 pages:42-49 extent:8 https://doi.org/10.1016/j.jpowsour.2013.03.163 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 240 2013 15 1015 42-49 8 045F 620 |
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English |
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Enthalten in Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method New York, NY [u.a.] volume:240 year:2013 day:15 month:10 pages:42-49 extent:8 |
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Enthalten in Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method New York, NY [u.a.] volume:240 year:2013 day:15 month:10 pages:42-49 extent:8 |
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Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method |
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Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. 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influence of current collector on capacitive behavior and cycling stability of tiron doped polypyrrole electrodes |
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Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes |
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In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. |
| abstractGer |
In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. |
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In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors. |
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