镍
电镀
材料科学
电化学
电极
阴极
化学工程
欧姆接触
阴极保护
基质(水族馆)
气体扩散
图层(电子)
冶金
复合材料
化学
物理化学
工程类
地质学
海洋学
作者
F. Bidault,Dan J. L. Brett,Hugh Middleton,N. Abson,Nigel P. Brandon
标识
DOI:10.1016/j.ijhydene.2009.06.035
摘要
The use of nickel foam as an electrode substrate in alkaline fuel cells (AFCs) has been investigated for bi-polar cells incorporating an electrically conducting gas diffusion layer. This contribution focuses on the cathode, and draws comparisons between nickel foam and nickel mesh substrates. One of the principal electrocatalysts for the cathodic reduction of oxygen is silver, so an improvement in electrochemical performance was obtained by electroplating the nickel foam with silver. The electrodeposition process was optimised to maximise electrochemical performance with a minimum of silver deposited. Nickel foam, which is less expensive than the usual nickel mesh, appears to be a good substrate for AFC electrode fabrication, especially when incorporating a conducting gas diffusion layer. Silver deposited by electroplating onto the nickel foam was found to result in significantly enhanced electrochemical performance, with a reduction in both the Ohmic resistance of the electrode, as well as the oxygen reduction reaction charge transfer resistance.
科研通智能强力驱动
Strongly Powered by AbleSci AI