Issue 6, 2011

A divided potential driving self-discharge process for single-walled carbon nanotube based supercapacitors

Abstract

Understanding the self-discharge (SDC) mechanism is crucial for obtaining supercapacitors with tunable energy retention. Supercapacitors built with free standing single-walled carbon nanotube (SWNT) macro-films and 1M TEABF4/PC electrolyte exhibit a unique divided potential driving SDC discharge process as demonstrated by the perfect fitting results of the SDC curves under different charge current densities and at different SDC temperatures. The divided potential driving SDC process could be attributed to the existence of various functional groups attached to the SWNT surface from the purification process, through intervening and creating relatively weak bonds between the electrolytic ions and the SWNT electrode surface.

Graphical abstract: A divided potential driving self-discharge process for single-walled carbon nanotube based supercapacitors

Article information

Article type
Paper
Submitted
16 Jun 2011
Accepted
21 Jul 2011
First published
14 Sep 2011

RSC Adv., 2011,1, 989-994

A divided potential driving self-discharge process for single-walled carbon nanotube based supercapacitors

Q. Zhang, J. Rong and B. Wei, RSC Adv., 2011, 1, 989 DOI: 10.1039/C1RA00318F

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