Cl^-和Al^(3+)复合掺杂α-Ni(OH)_2的电化学性能  

Structure and Electrochemical Performance of Anion Cl^- and Cation Al^(3+) Cosubstituted α-Ni(OH)_2

作　　者：刘爱芳[1] 刘长久[1] 谷得龙[1] 宋莎[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》2008年第2期209-211,共3页Journal of Guilin University of Technology

基　　金：广西自然科学基金资助项目(桂科基0731001)

摘　　要：采用化学反应共沉淀法制备出Cl-和Al3+阴阳离子复合掺杂的α-Ni(OH)2粉体材料。对其进行了微结构表征分析和电化学性能测试,结果表明:样品材料具有较多的微结构缺陷,用作MH-Ni电池的正极活性材料时,在充放电过程中电化学阻抗较小、质子迁移能力强。电池在以80 mA/g恒电流充电5 h,40 mA/g恒电流放电,终止电压为1.0 V的充放电制度下,其放电比容量达344.3 mAh/g,且放电工作电压稳定,循环可逆性较好,表现出较高的电化学活性。The Al^3＋ cation and Cl^- anion co-doped α-Ni（OH）2 power material is prepared by the method of chemical co-precipitation.Its microstucture is characterized and electrochemical performance is tested.Experiment results show that the sample materials have more construction faults and little electrochemical impedance in the process of charge-discharge when used as cathode active material in MH-Ni battery.The ability of protons transposition is strong.When the battery is charged for 5 h at 80 mA/g,discharged as certain electricity,1.0 V as the final voltage,its specific capacity reaches 344.3 mA/g with the properties of cyclic reversibility and high electrochemical activity.

关 键 词：Α-NI(OH)2 阴阳离子复合掺杂 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]