Abstract

通过水热法制备了粘附于导电碳纳米管(CNT)纸表面生长的层级花状β-Co(OH) 2 , 并将其作为电化学电容器高性能柔性复合电极材料。用X射线衍射(XRD)和扫描电子显微镜(SEM)表征了产物的微观结构和形貌。所得材料为三维疏松分层纳米花结构的β-Co(OH) 2 /CNT纸复合材料, 其直径约为3 μm。通过循环伏安法、恒电流充放电和交流阻抗等测试手段研究了该柔性材料的电容性能, 结果表明: 该复合材料在6 mol/L KOH电解液中, 电流密度为2 A/g时比容量达到2764 F/g; 碳纳米管纸赋予了复合材料优良的导电性和柔韧性, 同时β-Co(OH) 2 的层级花状结构利于活性物质与电解液之间的接触, 因此, 复合材料与纯的β-Co(OH) 2 相比, 倍率容量和循环性能都得到明显改善。

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