化学镀铜对贮氢合金La0.75Mg0.25Ni3.2Co0.2Al0.1电极性能的影响

doi:10.3969/j.issn.1001-4381.2013.05.009

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Abstract A₂B₇-type La_0.75Mg_0.25Ni_3.2Co_0.2Al_0.1 hydrogen storage alloy was coated by means of chemical plating. The effects of Cu coatings on the electrochemical properties of the hydrogen storage alloy were studied at different temperatures systematically. The results show that the cycling stability of the electrode is improved. The Cu coated powder electrode is better than bare electrode in exchange current density I₀, high rate discharge ability and hydrogen diffusion coefficient D with increasing reaction temperature. The maximum discharge capacity of alloy electrodes decreases.

Key words： A₂B₇ type hydrogen storage alloy Cu coating electrochemical property

Received: 15 March 2012 Published: 20 May 2013

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TG146.4

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http://jme.biam.ac.cn/EN/10.3969/j.issn.1001-4381.2013.05.009 OR http://jme.biam.ac.cn/EN/Y2013/V0/I5/44

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