摘要
以高性能活性炭作为负极材料，将颗粒平均粒径为40～60nm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7mol／L的KOH水溶液中的电化学性能，其充放电电压可以达到1．4～1．6V，以材料本身重量计算的比能量和比功率分别达到15．4W·h／kg和23．5kW／kg．
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 electro- chemical capacitor is an attractive system being worthy to make great efforts to investigate deeply further.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第11期2138-2141,共4页
Chemical Journal of Chinese Universities
基金
国家自然基金重点项目(批准号:20633040)资助
关键词
活性炭
钴氧化物干凝胶
电化学电容器
Activated carbon
Cobalt oxide xerogels
Electrochemical capacitor
