摘要
采取溶胶凝胶法在活性炭表面原位合成RuO2·xH2O,经150℃热处理后制成的碳钌复合材料首次应用于碱性电化学电容器中。经电化学测试表明,碳钌电极在碱液中具有良好的容量性质和高功率放电特性,当电流密度为1.0A/g,钌含量为15%(质量分数,下同)的复合材料作为碱性电容的正极,其单电极比容量可达274F/g,是空白活性炭材料的1.22倍,并可较好地抑制电容自放电;该复合材料作为碱性电容的负极,相同电流条件下虽然也具有较高的单电极比容量(278F/g),但电容的自放电现象较为严重。
RuO2·xH20 on the surface of activated carbon was synthesized by a sol-gel process. After heat treatment at 150℃, the carbon ruthenium composite was applied in the alkaline electrochemical capacitor as electrode activated materials. Electrochemical tests showed that carbon ruthenium composite electrode had good performance on capacitance and high power discharge ability in alkaline solution. As the positive electrode of alkaline electrochemical capacitor, the composite which contained 15% Ru had a specific capacitance about 274 F/g when the current density was 1.0 A/g. This capacitance was 1.22 times of that of the activated carbon. And the carbon ruthenium composite could also restrain capacitor＇s self-discharge. As the negative electrode of alkaline electrochemical capacitor, the composite had a specific capacitance about 278 F/g at the same current density, and the capacitor＇s self-discharge would be accelerated.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第11期1734-1737,共4页
Rare Metal Materials and Engineering
基金
国家基础研究重大项目前期研究专项(2001CCA05000)
国家重点基础研究发展计划(2002CB211800)
