镧(Ⅲ)与锌(Ⅱ)复合掺杂非晶Ni(OH)_2的电化学性能  

Electrochemical Performance of La(Ⅲ) and Zn(Ⅱ) Multi-doped Amorphous Ni(OH)_2

作　　者：吴华斌[1] 刘长久[1] 孙丹[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：《稀有金属》2008年第2期203-206,共4页Chinese Journal of Rare Metals

基　　金：国家自然科学基金资助项目(20563001);广西科学研究与技术开发计划项目(05112001-2A1);广西研究生教育创新人才基地资助项目(200718)

摘　　要：采用微乳液快速冷冻共沉淀法制备镧(Ⅲ)与锌(Ⅱ)复合掺杂非晶态氢氧化镍粉体。样品材料的结构形态和形貌采用XRD,SEM和Ra-man光谱进行表征分析,同时将样品合成电极材料并组装成MH-Ni模拟电池,研究了样品电极的不同掺杂量对其电化学性能的影响及其相应的作用机制。实验结果发现,在80mA·g-1恒电流充电5h,40mA·g-1恒电流放电,终止电压为1.0V的充放电制度下,复合掺杂4%La(Ⅲ)6%Zn(Ⅱ)样品的放电平台为1.273V,放电容量为346.86mAh·g-1,且电极材料在充放电过程中的稳定性和循环可逆性较好。La（Ⅲ） and Zn（Ⅱ） multi-doped amorphous nickel hydroxide powders were prepared by the method of micro-emulsion accelerated co-deposition. XRD, SEM, Raman spectroscopy were used to analyze the structure configuration and morphology of the material. A simulated MH-Ni battery was constructed with the sample electrode. Then the effect of electrodes with different doping on electrochemical performances and its mechanism of action were studied. The experimental results showed that while the sample with multi-doped 4%La（Ⅲ） and 6%Zn（Ⅱ） was charged at 80 mA·g^-1 for 5 h and discharged at 40 mA·g^-1 to 1.0 V, the discharge voltage plateau was smoothed at 1.273 V, the discharge specific capacity could be reached as high as 346.86 mAh·g^-1. In the process of charge and discharge, the electrodes stability and circle reversibility were good.

关 键 词：微乳液法 镧(Ⅲ)与锌(Ⅱ)复合掺杂 非晶态氢氧化镍 电化学性能 

分 类 号：TM911[电气工程—电力电子与电力传动]