Effects of yttrium-doping on high-temperature electrochemical performances of nickel hydroxide electrodes

被引：4
作者：
Ren Jun-Xia [1 ]
Zhou Zhen [1 ]
Yan Jie [1 ]
机构：
[1] Nankai Univ, Inst New Energy Mat Chem, Tianjin 300071, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2007年 / 23卷 / 05期
关键词：
nickel-metal hydride battery; nickel hydroxide electrode; high-temperature performance; charge efficiency; rare earth element;
D O I：
10.3866/PKU.WHXB20070522
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：
Y-doped beta-Ni(OH)(2) and alpha-Ni(OH)(2) materials were synthesized, and the influences of Y on the structure, morphology and high-temperature electrochemical characteristics of the two kinds of materials were studied through XRD, TEM, CV, and charging/discharging tests. The results indicated that yttrium improved high-temperature electrochemical performances of beta-Ni(OH)(2) and alpha-Ni(OH)(2) materials by the same mechanism that the charge efficiency was enhanced through the increase of oxygen evolution overpotentials. However, further efforts are still necessary to improve the phase stability of alpha-Ni(OH)(2) at high temperatures.
引用
收藏
页码：738 / 742
页数：5
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