Co 取代 Ni(OH)_2 电极电化学行为的研究

Studies on Cobalt Substitued Ni(OH) 2 and Its Electrochemical Behaviour

研究了由Ｃｏ取代Ｎｉ位置的Ｎｉ（ＯＨ）２电极，由χ射线衍射测定了其结构与α－Ｎｉ（ＯＨ）２相同，且能在碱液中及电化学循环时稳定存在。放电结果表明，充放电循环过程中，电子转移数目大于１（不同于以往在Ｎｉ（Ⅱ）与Ｎｉ（Ⅲ）间进行），在本实验中最高可达１３８。实验制得的电极和β－Ｎｉ（ＯＨ）２电极相比，具有较小的界面转移阻抗和较高的充电效率，且具有良好的机械性能。本文还对实验结果和可能的机理进行了简要的分析和探讨。

The structures of self made cobalt substituted Ni(OH) 2 have been verified to be the same as α Ni(OH) 2 by XTD spectroscopy.They coule remain stable in both alkaline solution and during a few charge/discharge cycles.Discharge results showed that the number of electrons transrerred was more than 1 mol per mol Ni,and the highest number in this experimental was 1 38.The self made Ni(OH) 2 electrodes showed less interfical charge transfer impendence,higher charge efficiency and better mechanical properties when compared with β Ni(OH) 2 electrodes.The mechanism of their behaviour was also analysed tentetively.