摘要
为研制低成本、高比容超级电容器的关键复合电极材料,采用涂覆热分解法,以RuCl3.2H2O为前躯体,制备二氧化钌/活性炭复合电极材料。借助扫描电镜、附着力测试、循环伏安、恒流充放电和电化学阻抗谱等检测手段,观察复合薄膜电极材料的表面形貌,分析不同涂覆量的二氧化钌/活性炭复合薄膜电极的性能。研究结果表明:二氧化钌/活性炭复合电极材料具有良好的电化学稳定性,涂覆热分解最佳涂覆数为4次,复合薄膜的比表面积为321.4 m2/g,附着力为11.4 MPa;在H2SO4溶液浓度为0.5 mol/L、扫描速率20 mV/s条件下,复合电极材料的比电容为422 F/g,内阻为0.33Ω;经300次充放电后,电容量持续为98.8%。
To research low-cost,high specific capacitance key composite electrode materials for super-capacitors,ruthenium oxide coated active carbon（RuO2/AC） was prepared by coating and thermal decomposition of ruthenium chloride on AC matrix.The morphology of the composite electrode was investigated by SEM.The performances of RuO2/AC composite membrane electrode at different coating numbers were characterized by adhesion,cyclic voltammetry,constant current charge-discharge and electrochemical impedance spectroscopy analyses.The results show that the best coating number is 4 times,when the composite film has a surface area of 321.4 m2/g,and adhesion of 11.4 MPa.The specific capacitance of RuO2/AC composite electrode is 422 F/g measured at 20 mV/s in 0.5 mol/L H2SO4,and the inner resistance is 0.33 Ω.After 300 cyclic-life,the specific capacitance of RuO2/AC composite electrode is kept at 98.8%,indicating that the composite electrode has a good electrochemical stability and can be used as the electrodes for super-capacitors.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第2期336-341,共6页
Journal of Central South University:Science and Technology
基金
国家高技术研究发展计划("863"计划)项目(2007AA03Z240)
关键词
超级电容器
复合电极
活性炭
二氧化钌
super-capacitors
composite electrode
active carbon
ruthenium oxide（RuO2）
