AB5-AB2复合合金电极的微观结构和活化性能

稀有金属, 2002, 26(6): 521-523. doi: 10.3969/j.issn.0258-7076.2002.06.024

AB5-AB2复合合金电极的微观结构和活化性能

韩树民 ^1, , 赵敏寿 ^2, , 乔玉卿 ^3, , 郑炀曾 ^4,

1.燕山大学环境与化学工程系,河北,秦皇岛,066004;中国科学院长春应用化学研究所稀土化学与物理重点实验室,吉林,长春,130022

2.燕山大学环境与化学工程系,河北,秦皇岛,066004;中国科学院长春应用化学研究所稀土化学与物理重点实验室,吉林,长春,130022

3.燕山大学环境与化学工程系,河北,秦皇岛,066004

4.燕山大学环境与化学工程系,河北,秦皇岛,066004

基金项目: 国家自然科学基金(20171042) 中国科学院重点实验室基金

关键词：贮氢合金 , 复合合金电极 , 微观结构 , 电化学性能 , 协同效应

Microstructure and Activation Characteristics of AB5-AB2 Composite Alloy Electrode

根据AB5型稀土基合金的活化性能优良及对氢化和氢化物分解过程具有催化作用的特点, 将Zr0.9Ti0.1(Mn0.35Ni0.65)2 AB2型Laves相合金与AB5型混合稀土合金进行机械球磨处理, 制备了AB5-AB2复合合金. 研究了复合合金的微观结构和电化学性能, 结果表明: 在AB5-AB2复合合金中, AB5粒子与AB2粒子在表面处相互镶嵌在一起, 并仍保持原来的晶体结构. 复合合金电极的活化周期从AB2合金的11周减少到4周, 最大放电容量从141 mAh*g-1增加到218 mAh*g-1, 而且在活化初期表现出协同效应.

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