An asymmetric anthraquinone-modified carbon/ruthenium oxide supercapacitor

被引：134
作者：
Algharaibeh, Zaher [1 ]
Liu, Xiaorong [1 ]
Pickup, Peter G. [1 ]
机构：
[1] Mem Univ Newfoundland, Dept Chem, St John, NF A1B 3X7, Canada
来源：
JOURNAL OF POWER SOURCES | 2009年 / 187卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Supercapacitor; Carbon; Anthraquinone; Ru oxide; Energy density; Power density; HYDROUS RUTHENIUM OXIDE; CHARGE STORAGE MECHANISM; ELECTROCHEMICAL CAPACITORS; ENERGY; SPECTROSCOPY; ELECTRODES; DENSITIES; BATTERIES; HYBRID; CARBON;
D O I：
10.1016/j.jpowsour.2008.11.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
An asymmetric supercapacitor with improved energy and power density, relative to a symmetric Ru oxide device, has been constructed with anthraquinone-modified carbon fabric (Spectracarb 2225) as the negative electrode and Ru oxide as the positive electrode. The performance of the supercapacitor was characterized by cyclic voltammetry and constant current discharging. Use of the anthraquinone-modified electrode extends the negative potential limit that can be used, relative to Ru oxide, and allows higher cell voltages to be used. The maximum energy density obtained was 26.7 Wh kg(-1) and an energy density of 12.7 Wh kg(-1) was obtained at a 0.8 A cm(-2) discharge rate and average power density of 17.3 kW kg(-1). The C-AQ/Ru oxide supercapacitor requires 64% less Ru relative to a symmetric Ru oxide supercapacitor. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：640 / 643
页数：4
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