铸态Mm(NiCoMnAlB)_(5+χ)储氢合金的电化学性能  

Electrochemical properties of as-cast Mm(NiCoMnAlB)_(5+χ) hydrogen storage alloys

作　　者：韩卫平[1,2] 郭宏[3] 张习敏[3] 黄继华[1] 

机构地区：[1]北京科技大学材料科学与工程学院 [2]北京有色金属研究总院复合材料中心,北京100088 [3]北京有色金属研究总院复合材料中心

出　　处：《北京科技大学学报》2006年第10期941-945,共5页Journal of University of Science and Technology Beijing

基　　金：国家"863计划"资助项目(No.2002AA323070)

摘　　要：主要研究了硼对低钴(质量分数小于5%)储氢合金电化学性能的影响,并设计了Mm(NiCoMnAlB)5+χ(χ=0.02,0.03,0.05,0.1,0.2,0.3)一系列非化学配分铸态合金成分.结果表明,硼的加入可以提高活性和高倍率性能,但降低合金的放电容量.微观分析可知,加入硼可形成第二相,提高活性和高倍率性能.同时利用MASTER软件对合金成分进行了优化,得出最佳合金成分Mm(NiCoMnAlB)5.1,预测出新合金成分Mm(NiCoMnAlB)5.08,并用实验方法验证了性能结果.This paper studied the effect of B additive on the electrochemical properties of hydrogen storage alloys with the Co mass fraction less than 5 % and designed non-stoichiometry cast alloys Mm（NiCoMnAlB）5＋ χ（χ = 0.02, 0.03, 0.05, 0.1, 0.2, 0.3）. The results show that the activation performance and high ratio discharge property are improved, but the discharge capacity is reduced. Microstructure analysis approves that B additive in the alloys forms secondary phase CeCo4B, which can improve high ratio discharge property. Special software MASTE was used to optimize the composition. It is found when the addition of B is 0.1 in atom ratio the comprehensive properties are the best. A new alloy composition Mm （NiCoMnAlB）5.08 was predicted, and the electrochemical properties were proved by experiment.

关 键 词：储氢合金 铸态合金 电化学性能 模式识别 神经网络 

分 类 号：TG139.7[一般工业技术—材料科学与工程]