纳米级β-氢氧化镍和氧化镍掺杂Co(OH)_2复合电极的电化学性能  

Study on electrochemical properties of nano NiO and β-Ni(OH)_2 doped with Co(OH)_2

作　　者：刘长久[1] 叶乃清[1] 黄巧妹 尚伟[1] 刁汉明[1] 朱华平[1] 

机构地区：[1]桂林工学院材料与化学工程系,广西桂林541004

出　　处：《桂林工学院学报》2002年第2期166-170,共5页Journal of Guilin University of Technology

基　　金：广西自然科学基金资助项目 (0 0 0 70 19)

摘　　要：通过采用NiC2 O4 ·2H2 O和NaOH进行固相反应 ,制备出 1 0～ 2 0nm的 β_Ni(OH) 2 和2 0～ 3 0nmNiO粉体 ,样品按一定的比例掺杂Co(OH) 2 和石墨粉制备复合电极 ,研究其电化学性能 .结果表明掺杂Co(OH) 2 的纳米Ni(OH) 2 和NiO复合电极其电化学性能有明显的改善 ,其电极结构稳定 ,充电效率高 ,开路电位达 2 4V ,电极经 1 0mA/cm2 恒电流充电 3h后 ,以 0 9mA/cm2 进行恒流放电 ,放电时间达到 1 6h以上 ,放电容量明显增大 ,放电电位平稳 .NiC 2O 4·2H 2O is used to react with NaOH in the solid state to obtain 10～20 nm β_Ni(OH) 2 and 20～30 nm NiO power. Then adding certain content of Co(OH) 2 and C can manufacture the electrode and study their electrochemical characteristics. The result that the electrochemical characteristics of the Nanophase Ni(OH) 2 and NiO with Co(OH) 2 is obviously better. Their electrode structure is stable and can increase the charged efficiency. Its open curcuit voltage is up to 2 4 V. After electrode charged 3 h with constant current of 10 mA/cm 2, it can discharge above 16 h with constant current of 0 9 mA/cm 2. The capacity of the electrode is increased obvioursly and the discharged voltage is stable.

关 键 词：β-据氧化镍 氧化镍 CO(OH)2 复合电极 固相反应 Β-NI(OH)2 NiO 纳米粉体 掺杂 电化学性能 

分 类 号：TM910.3[电气工程—电力电子与电力传动] D646[政治法律—政治学]