高等学校化学学报

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活性炭/钴氧化物干凝胶电化学电容器性能

程杰, 曹高萍, 杨裕生   

  1. 防化研究院, 北京 100083
  • 收稿日期:2007-03-27 修回日期:1900-01-01 出版日期:2007-11-10 发布日期:2007-11-10
  • 通讯作者: 程杰

Performance of Activated Carbon/Cobalt Oxide Xerogels Electrochemical Capacitors

CHENG Jie*, CAO Gao-Ping, YANG Yu-Sheng   

  1. Research Institute of Chemical Defence, Beijing 100083, China
  • Received:2007-03-27 Revised:1900-01-01 Online:2007-11-10 Published:2007-11-10
  • Contact: CHENG Jie

摘要: 以高性能活性炭作为负极材料, 将颗粒平均粒径为40~60 nm的纳米钴氧化物干凝胶作为正极材料组成电化学电容器, 研究了电容器在7 mol/L的KOH水溶液中的电化学性能, 其充放电电压可以达到1.4~1.6 V, 以材料本身重量计算的比能量和比功率分别达到15.4 W·h/kg和23.5 kW/kg.

关键词: 活性炭, 钴氧化物干凝胶, 电化学电容器

Abstract: Electrochemical capacitors composed with high capacitive activated carbon and cobalt oxide xerogels electrodes were studied in 7 mol/L KOH aqueous solution. The electrochemical capacitance performance of the electrochemical capacitors was studied by means of cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge tests. The maximum charge/discharge voltage of the electrochemical capacitors was in the range of 1.4—1.6 V, and a maximum energy density of 15.4 W·h/kg and a maximum power density of 23.5 kW/kg were obtained on the basis of total weight of the two electrodes except current collector. High performance obtained indicates that the activated carbon/cobalt oxide xerogels electrochemical capacitor is an attractive system being worthy to make great efforts to investigate deeply further.

Key words: Activated carbon, Cobalt oxide xerogels, Electrochemical capacitor

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