通过改进后的胶体法制备了60%(质量分数)RuO2-活性碳(AC)复合电极材料,然后在不同的温度下烧结6 h.采用电化学工作站对该复合电极进行了循环伏安、恒流充放电及交流阻抗测试,用SEM、EDS及XRD对不同温度烧结后复合材料的形貌结构进行表征.结果表明:240℃烧结后复合电极的比电容最大,其值为445 F/g,且充放电性能良好;复合电极的阻抗值在240℃以下时随烧结温度的升高呈递减趋势,高于此温度后略有增大;复合电极材料在240℃烧结后呈细小均匀的水合RuO2粒子,分布在碳基体上;复合电极材料中的RuO2保持非晶结构,高于270℃后有较多的晶体相生成;改进后的胶体法制备的复合电极在240℃烧结后电化学性能较优良.
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