电沉积法制备掺杂钴的氢氧化镍电极材料及其容量特性
于维平,杨晓萍,孟令款,刘兆哲
摘要(Abstract)：
采用电化学共沉积技术在泡沫镍基体上制备了掺杂氢氧化钴的氢氧化镍电极,研究了其容量特性。结果表明:0.5mol/L Ni(NO3)2和0.25mol/L Co(NO3)2溶液以体积比Ni(NO3)2∶Co(NO3)2=8.5∶1.5混合作为沉积溶液时,所得掺钴的氢氧化镍电极性能最佳。XRD和SEM分析表明:所得产物为掺杂-αCo(OH)2的-αNi(OH)2,晶粒尺寸为2~10 nm,其粒子形貌呈球状,粒径在0.5~2μm之间。将其组装成C/Ni(OH)2模拟超级电容器,在充放电电流为5mA的条件下,循环40次后比电容为460 F/g,其比电容数值随循环次数增加逐渐趋于稳定。
关键词(KeyWords)： 电化学;共沉积;氢氧化镍;超级电容器;正极
基金项目(Foundation): 国家“863”计划(2002AA32405)
作者(Author): 于维平,杨晓萍,孟令款,刘兆哲
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