Electrochemical hydrogen-storage properties of La0.78Mg0.22Ni2.67Mn0.11Al0.11Co0.52-M1Ni3.5Co0.6Mn0.4Al0.5 composites

Journal of the Brazilian Chemical Society

Xiamen University of Technology, Xiamen, People's Republic of China¹  Zhuang, Shuxin¹  Guilin University of Technology, Guilin, People's Republic of China¹  Huang, Hongxia¹  Li, Guohui¹  Ministry of Education, Guilin, People's Republic of China¹ 

关键词: AB3-type alloy;    composite electrode material;    cycle stability;   

DOI  :  10.5935/0103-5053.20130169

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

For improving the electrochemical properties of nonstoichiometric AB3-type La0.78Mg0.22Ni2.67Mn0.11Al0.11Co0.52 alloy as negative electrode of Ni-MH battery, its related composites La0.78Mg0.22Ni2.67Mn0.11Al0.11Co0.52-x wt.% M1Ni3.5Co0.6Mn0.4Al0.5 (x = 0, 10, 20, 30) were prepared. Analysis by X-ray diffractometry (XRD) revealed that the composites consist mainly of LaNi5 and La2Ni7 phases. Despite the small decrease in the maximum discharge capacity, the cycle performance was significantly enhanced. Linear polarization (LP), anodic polarization (AP) and potential step discharge experiments revealed that the electrochemical kinetics increases first and then decreases with increasing x.

【 授权许可】

Unknown