新型低钴AB_5型贮氢合金  

A Novel AB_5-type Hydrogen Storage Alloy with Low Co Content

作　　者：李克杰[1] 李全安[1] 李守英[1] 张清[1] 张兴渊[1] 文九巴[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《有色金属》2007年第3期9-11,16,共4页Nonferrous Metals

基　　金：河南省杰出青年科学基金(0312000200);河南省高校创新人才培养基金(豫高教[2002]129)

摘　　要：在贮氢合金MLNi3.55Co0.75Al0.3Mn0.4的基础上,采用Cu,Fe,Zn,Cr替代Co和加入稀土Dy的方法制备低钴AB5型贮氢合金,得到稀土基多元贮氢合金,并对其放电容量、循环稳定性以及微观结构进行了测试和分析。结果表明,采用适量的Cu,Fe,Zn,Cr替代Co所得的高容量低钴贮氢合金具有较好的循环稳定性,添加Dy不仅使合金具有较高的放电容量,而且明显改善低钴贮氢合金的组织均匀性和充放电循环稳定性。The AB5-type hydrogen storage alloy with low Co content is prepared by substitution of Cu, Cr, Zn and Fe for part Co on the B-side and addition of Dy on the A-side based on the standard alloy MLNi3.55Co0.75Al0.3Mn0.4. The discharge capacity, cycle stability and microstructure of the alloy are tested and analyzed. The results show that low-Co hydrogen storage alloy with high discharge capacity and good cycle stability can be obtained by multi-alloying with Cu, Fe, Zn, Cr for replacement of Co. The better cycling stability, more homogeneous composition and good discharge capacity of the alloy are achieved by addition of Dy.

关 键 词：金属材料 贮氢合金 电化学性能 DY 

分 类 号：TG139.7[一般工业技术—材料科学与工程]