摘要
采用循环伏安法研究了Ｎｉ（ＯＨ）２粉末微电极，认为Ｎｉ（ＯＨ）２微电极电化学过程是一个准可逆过程且电极反应在Ｎｉ（ＯＨ）２／ＮｉＯＯＨ之间进行．研究了在阳极过程中掺杂元素对Ｎｉ（ＯＨ）２质子扩散系数的影响，发现掺Ｃｏ后比纯Ｎｉ（ＯＨ）２的扩散系数提高近１倍，而掺Ｚｎ后则扩散系数有所降低．掺Ｃｏ和Ｚｎ后Ｎｉ（ＯＨ）２电极的析氧电位均比纯Ｎｉ（ＯＨ）２的析氧电位有所提高．
The cycling voltammetry was used to study the powder microelectrode of Ni(OH) 2. It was demonstrated that the electrochemical process for the Ni(OH) 2 microelectrode was a pseudo reversible one and the electrode reaction proceeded between Ni(OH) 2 and NiOOH. The effects of the additive elements Co and Zn on the proton diffusion coefficients in the anodic process were investigated. The experimental results showed that the proton diffusion coefficient was approximately doubled with the addition of Co. However it slightly decreases after the addition of Zn. The oxygen evolution potential for the nickel microelectrode added with Co and Zn was a little bigger than that of the pure Ni(OH) 2 microelectrode.
出处
《中南工业大学学报》
CSCD
北大核心
1998年第6期556-558,共3页
Journal of Central South University of Technology(Natural Science)
关键词
微电极
扩散系数
电化学行为
氢氧化镍
电池
Ni(OH) 2
microelectrode
cycling voltammetry
diffusion coefficient
