中文摘要：

以溶胶．凝胶法制备La1-xSrxCoO3（x=0．2，0．4，0．6，0．8）电极材料，XRD表征证明所得产物属钙钛矿相．南循环伏安和充放电曲线测试了La1-xSrxCoO3在碱性介质中的电化学电容性能．结果表明，La1-xSrxCoO3电极10mA．cm。z电流密度的放电比电容为325F·g^-1,500周期循环后其比电容仍保持于315F·g^-1．比电容保持率97．0％．

英文摘要：

In this paper, the La1-xSrxCoO3（x = 0.2, 0.4, 0.6, 0.8） perovskites powders were synthesized by a sol-gel method, The perovskite phases were characterized by X-ray diffraction （XRD）, while the electrochemical capacitance performance of La1-xSrxCoO3electrodes in alkaline electrolyte was studied by cyclic voltammetry and galvanostatic charge/discharge test. It was found that the La1-xSrxCoO3electrode exhibited a specific capacitance of 325 F ·g^-1 in 6.0 mol ·L^-1 KOH electrolyte at a current density of 10 mA. cm-2, and the specific capacitance of 315 F·g^-1could be maintained after 500 charge/discharge cycles which corresponds to the retention rate of 97%.