Charge redistribution and ionic mobility in the micropores of supercapacitors
It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A sim...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Graydon, John W. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2014transfer 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.] |
|---|---|
| Übergeordnetes Werk: |
volume:245 ; year:2014 ; day:1 ; month:01 ; pages:822-829 ; extent:8 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.jpowsour.2013.07.036 |
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ELV012343757 |
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| 520 | |a It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. | ||
| 520 | |a It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. | ||
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10.1016/j.jpowsour.2013.07.036 doi GBVA2014012000006.pica (DE-627)ELV012343757 (ELSEVIER)S0378-7753(13)01217-2 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Graydon, John W. verfasserin aut Charge redistribution and ionic mobility in the micropores of supercapacitors 2014transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. Minimum pore size Elsevier Ionic mobility Elsevier Supercapacitor Elsevier Charge redistribution Elsevier Panjehshahi, Milad oth Kirk, Donald W. 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:245 year:2014 day:1 month:01 pages:822-829 extent:8 https://doi.org/10.1016/j.jpowsour.2013.07.036 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 245 2014 1 0101 822-829 8 045F 620 |
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10.1016/j.jpowsour.2013.07.036 doi GBVA2014012000006.pica (DE-627)ELV012343757 (ELSEVIER)S0378-7753(13)01217-2 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Graydon, John W. verfasserin aut Charge redistribution and ionic mobility in the micropores of supercapacitors 2014transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. Minimum pore size Elsevier Ionic mobility Elsevier Supercapacitor Elsevier Charge redistribution Elsevier Panjehshahi, Milad oth Kirk, Donald W. 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:245 year:2014 day:1 month:01 pages:822-829 extent:8 https://doi.org/10.1016/j.jpowsour.2013.07.036 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 245 2014 1 0101 822-829 8 045F 620 |
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10.1016/j.jpowsour.2013.07.036 doi GBVA2014012000006.pica (DE-627)ELV012343757 (ELSEVIER)S0378-7753(13)01217-2 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Graydon, John W. verfasserin aut Charge redistribution and ionic mobility in the micropores of supercapacitors 2014transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. Minimum pore size Elsevier Ionic mobility Elsevier Supercapacitor Elsevier Charge redistribution Elsevier Panjehshahi, Milad oth Kirk, Donald W. 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:245 year:2014 day:1 month:01 pages:822-829 extent:8 https://doi.org/10.1016/j.jpowsour.2013.07.036 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 245 2014 1 0101 822-829 8 045F 620 |
| allfieldsGer |
10.1016/j.jpowsour.2013.07.036 doi GBVA2014012000006.pica (DE-627)ELV012343757 (ELSEVIER)S0378-7753(13)01217-2 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Graydon, John W. verfasserin aut Charge redistribution and ionic mobility in the micropores of supercapacitors 2014transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. Minimum pore size Elsevier Ionic mobility Elsevier Supercapacitor Elsevier Charge redistribution Elsevier Panjehshahi, Milad oth Kirk, Donald W. 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:245 year:2014 day:1 month:01 pages:822-829 extent:8 https://doi.org/10.1016/j.jpowsour.2013.07.036 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 245 2014 1 0101 822-829 8 045F 620 |
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10.1016/j.jpowsour.2013.07.036 doi GBVA2014012000006.pica (DE-627)ELV012343757 (ELSEVIER)S0378-7753(13)01217-2 DE-627 ger DE-627 rakwb eng 620 620 DE-600 690 VZ 50.92 bkl Graydon, John W. verfasserin aut Charge redistribution and ionic mobility in the micropores of supercapacitors 2014transfer abstract 8 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. Minimum pore size Elsevier Ionic mobility Elsevier Supercapacitor Elsevier Charge redistribution Elsevier Panjehshahi, Milad oth Kirk, Donald W. 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:245 year:2014 day:1 month:01 pages:822-829 extent:8 https://doi.org/10.1016/j.jpowsour.2013.07.036 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 245 2014 1 0101 822-829 8 045F 620 |
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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:245 year:2014 day:1 month:01 pages:822-829 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:245 year:2014 day:1 month:01 pages:822-829 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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Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method |
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Charge redistribution and ionic mobility in the micropores of supercapacitors |
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Charge redistribution and ionic mobility in the micropores of supercapacitors |
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Graydon, John W. |
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Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method |
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Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method |
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10.1016/j.jpowsour.2013.07.036 |
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charge redistribution and ionic mobility in the micropores of supercapacitors |
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Charge redistribution and ionic mobility in the micropores of supercapacitors |
| abstract |
It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. |
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It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. |
| abstract_unstemmed |
It is increasingly recognized that a significant component of apparent self-discharge in supercapacitors is, in fact, due to charge redistribution. This charge redistribution is due to the limited mobility and hence high resistance of ions moving in the smallest pores of the carbon electrodes. A simple two-branch equivalent circuit has been used to model this charge redistribution and has been applied to an ultramicroporous aqueous electrochemical capacitor. The results indicate that a substantial fraction of the total capacitance is found in the smallest pores and that the resistance to ionic movement is four orders of magnitude higher than in the bulk electrolyte. A survey of the literature indicates that many commercial capacitors with organic electrolyte have similar electrical properties. These properties mean that a significant fraction of the overall pore surface and hence capacitance of the electrode is not accessible during time frames of practical interest and is therefore wasted. A mechanism for the low mobility of ions in micropores is proposed. |
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Charge redistribution and ionic mobility in the micropores of supercapacitors |
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Panjehshahi, Milad Kirk, Donald W. |
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