Double-layer capacitance of waste coffee ground activated carbons in an organic electrolyte

被引：150

作者：

Rufford, Thomas E. ^{[1
]}

Hulicova-Jurcakova, Denisa ^{[1
]}

Fiset, Erika ^{[1
]}

Zhu, Zhonghua ^{[1
]}

Lu, Gao Qing ^{[1
]}

机构：

[1] Univ Queensland, ARC Ctr Excellence Funct Nanomat, Sch Engn, Brisbane, Qld 4072, Australia

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

Double-layer capacitor; Activated carbon; Food waste; Energy storage; Electrochemical impedance; CHEMICAL ACTIVATION; ELECTROCHEMICAL CAPACITORS; PORE-SIZE; SUPERCAPACITORS;

D O I：

10.1016/j.elecom.2009.02.038

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Using ZnCl(2) activation we prepared a series of carbon electrodes from waste coffee grounds to study the effect of mesopores on double-layer capacitance in a tetraethyl ammonium tetrafluoroborate/acetonitrile electrolyte. The activated carbon with the largest mesopore volume achieved an energy density of 34 Wh kg(-1) at low current loads, and significantly retained an energy density of 16.5 Wh kg(-1) and specific capacitance of more than 100 F g(-1) at fast charge-discharge rates (20 A g(-1)). The effect of mesopores on capacitance at fast charge-discharge rates is discussed. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：974 / 977

页数：4

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