【摘 要】
：
采用电化学阴极沉积还原Co(NO3)2的方法制备了具有准电容特性的氧化钻电极材料,其比容量达到280 F/g,采用CNTs作为电极基体,在其表面均匀的沉积了纳米钴化镍颗粒并由此制备了
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采用电化学阴极沉积还原Co(NO3)2的方法制备了具有准电容特性的氧化钻电极材料,其比容量达到280 F/g,采用CNTs作为电极基体,在其表面均匀的沉积了纳米钴化镍颗粒并由此制备了氧化钴碳纳米管复合电极材料.采用循环伏安,恒流充放电,交流阻抗及扫描电镜等方法考察了复合电极材料的容量特性、阻抗特性、自放电特性以及电极表观特征.实验表明复合电极具有良旱牡CNTs基体在明显降低氧化镍材料的阻抗的同时还提高了电极材料的电化学容量并拓宽了电极材料的有效工作电位窗,复合电极在1 mol/L KOH电解液中比容量达到322 F/g且表现了良好的电化学可逆性.并分别采用氧化钴/CNTs复合电极作为正极,活性炭纤维作为负极制备了复合型电化学电容器,其工作电压达到1.4 V,电容器质量比容量达到47 F/g.在0.1 A/cm2放电时,复合型电容器的能量密度达到10 Wh/kg,兼具高能量特性和优良的大电流放电特性.
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