Effect of Sm on the cyclic stability of La-Y-Ni-based alloys and their comparison with RE-Mg-Ni-based hydrogen storage alloy

被引：29
作者：
Guo, Miao [1 ,2 ]
Yuan, Huiping [1 ,2 ]
Liu, Yuru [1 ,2 ,3 ]
Jiang, Lijun [1 ,2 ]
机构：
[1] GRINM Grp Co Ltd, Natl Engn Res Ctr Nonferrous Met Mat & Prod New E, Beijing 100088, Peoples R China
[2] GRIMAT Engn Inst Co Ltd, Beijing 101407, Peoples R China
[3] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 10期
基金：
国家重点研发计划;
关键词：
RE-Y-Ni-based; Rare-earth hydrogen storage alloys; Electrochemical properties; Cyclic stability; Ni-MH Battery; ELECTROCHEMICAL PROPERTIES; ANNEALING TEMPERATURE; INTERMETALLIC COMPOUNDS; PHASE-STRUCTURE; A(2)B(7); MICROSTRUCTURE; AMORPHIZATION; PR;
D O I：
10.1016/j.ijhydene.2020.11.195
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The LaY2Ni9.7Mn0.5Al0.3 and LaSm0.3Y1.7Ni9.7Mn0.5Al0.3 alloys have been synthesized to investigate the effect of Sm partial substitution for Y on the cyclic stability of A(2)B(7)-type La -Y-Ni-based alloys. Their cyclic properties were also compared with the A(2)B(7)-type (RE0.85Mg0.15)(2)(NiAl)(7) (RE = Rare Earth) alloys. The gas-solid and electrochemical cycle lives were tested. The structural stability, pulverization, and oxidation/corrosion performances were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical methods. The partial substitution of Sm for Y improves anti-corrosion and anti-pulverization performances, thereby increasing the cycle life of A(2)B(7)-type La-Y-Ni-based hydrogen storage alloys. The A(2)B(7)-type RE-Y-Ni-based alloys exhibit better crystal structure stability, but the gas-solid and electrochemical cyclic stability is worse than A(2)B(7)type (RE0.85Mg0.15)(2)(NiAl)(7) alloys due to easier pulverization of particles and the oxidation of Y elements. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：7432 / 7441
页数：10
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