电解液中添加KF对AB5-型贮氢合金电化学性能的影响

稀有金属材料与工程, 2013, 42(5): 907-910.

电解液中添加KF对AB5-型贮氢合金电化学性能的影响

陈艺文 ^1, , 陈云贵 ^2, , 朱丁 ^3, , 吴朝玲 ^4, , 晁栋梁 ^5,

1.四川大学,四川成都610065

2.四川大学,四川成都610065

3.四川大学,四川成都610065

4.四川大学,四川成都610065

5.四川大学,四川成都610065

基金项目: project of Industry Academic and Research(2008B090500274) project supported by GD-MOE Coordination Chengdu Key Technologies R&D program(10GGYB897GX-023)

关键词：金属氢化物电极 , LaF3 , KF , 循环性能 , 高倍率性能

Electrochemical Performance Improvement of AB5-type Metal Hydride Electrode by Adding KF in KOH Electrolyte

Chen Yiwen ^1, , Chen Yungui ^2, , Zhu Ding ^3, , Wu Chaoling ^4, , Chao Dongliang ^5,

1.四川大学,四川成都610065

2.四川大学,四川成都610065

3.四川大学,四川成都610065

4.四川大学,四川成都610065

5.四川大学,四川成都610065

Keywords： metal-hydride electrode , LaF3 , KF , cycle life , HRD

研究了在6 mol/L KOH电解液中添加不同浓度KF对商用AB5-型贮氢合金的电化学性能的影响,研究发现合金的循环性能和循环后期的高倍率性能提高,通过XRD,SEM,SEI等分析表明,在电解液中添加KF生成的LaF3能显著提高合金耐腐蚀的能力,同时阻止合金电极在循环过程中析氢过电位降低,提高合金的动力学性能.

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