Study on electrochemical property of La0.75Mg0.25Ni2.85Co0.45-x(AlSn)x (x=0.0, 0.1, 0.2, 0.3) alloys
By Zhiqiang LAN and Jiacheng LI and Bing WEI and Rongrong ZHU and Jin GUO
Published in Journal of Rare Earths
NULL
2016
Abstract
La0.75Mg0.25Ni2.85Co0.45-x(AlSn)x (x=0.0,0.1,0.2,0.3) alloys were prepared by magnetic induction melting method, and the phase composition and electrochemical properties were investigated systematically. The alloys were mainly composed of LaNi5, La2Ni7 and LaNi3 phase, and the cell volume of LaNi5 increased with the Al and Sn contents. For the alloy corresponding to x=0.0, the Cmax and \C150\ were 348.9 and 185 mAh/g, respectively, then for the alloy electrode with x=0.2, even though the Cmax was only 309.0 mAh/g less than 348.9 mAh/g, the \C150\ of 231 mAh/g was much higher than 185 mAh/g. And the values of the limit current density, anodic peak current density and hydrogen diffusion coefficient of the La0.75Mg0.25Ni2.85Co0.35(AlSn)0.1 (x=0.1) alloy were 1079.5, 1023.8 mA/g and 5.71
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