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

被引：39

作者：

Zhang, Qing ^{[1
]}

Rong, Jiepeng ^{[1
]}

Wei, Bingqing ^{[1
]}

机构：

[1] Univ Delaware, Dept Mech Engn, Newark, DE 19716 USA

来源：

RSC ADVANCES | 2011年 / 1卷 / 06期

基金：

美国国家科学基金会;

关键词：

ELECTROCHEMICAL CAPACITORS; ENERGY; STORAGE; FABRICATION;

D O I：

10.1039/c1ra00318f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 TEABF(4)/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.

引用

页码：989 / 994

页数：6

共 21 条

[1] High-capacitance supercapacitor using a nanocomposite electrode of single-walled carbon nanotube and polypyrrole [J].