Al代α-Ni（OH）2的结构与电化学性能

摘要:

采用化学共沉积法制备了Al代α-Ni(OH)2并对其结构和电化学性能进行了研究。采用XRD，IR，SEM和TGA等方法研究了其结构特征和热稳定性，采用循环伏安法研究了所制备的α-Ni(OH)2的电化学性能。结果表明：采用25mol％的Al取代的方法得到的晶体结构为α-Ni(OH)2，且试样可以在碱性溶液中稳定存在。与β-Ni(OH)2相比，其具有较大的扩散系数，电极反应受扩散控制。

Abstract:

Al-substituted a-Ni(OH)2 was synthesized by chemical co-precipitation and its structure and thermal stability were studied through XRD, IR, SEM and TGA. The electrochemical properties were studied by cyclic voltammetric method. The results show that the 25mol% Al-substituted Ni(OH)2 is a-Ni(OH)2 and stable in alkali solution. Compared with )3-Ni(OH)2, the proton diffusion coefficient for a-Ni (OH)2 prepared in this paper is higher and the electrode reaction is controlled by the diffusion.