Effects of the coating characteristics of Y(OH)3 on the electrochemical performance of spherical Ni(OH)2 at elevated temperature

被引：18

作者：

Fan, Jing ^{[1
]}

Yang, Yifu ^{[1
]}

Yang, Yanbo ^{[1
]}

Shao, Huixia ^{[1
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2007年 / 53卷 / 04期

关键词：

nickel hydroxide; yttrium hydroxide; high-temperature performance; oxygen evolution reaction; nickel-metal hydride battery;

D O I：

10.1016/j.electacta.2007.08.055

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effects of the coating characteristics of Y(OH)(3) on the high-temperature performance of spherical Ni(OH)(2) were studied. The coating was per-formed by chemical surface precipitation under different conditions, and the characterization of Y(OH)(3)-coating layer was evaluated accordingly. The electrochemical properties of three as-prepared samples with different coating surface were characterized and compared at different temperature. The results reveal that the sample with dense and porous surface retains the excellent performance at elevated temperatures, and the necessary coating amount is only 0.55 at.%. The mechanism analysis suggests that the chemical nature and morphology of the coating layer plays an important role in oxygen evolution reaction (OER). The coating surface with dense and porous morphology, larger relative surface content and higher utilization ratio of yttrium is more effective on controlling OER and improving the high-temperature performance of Ni(OH)(2) electrode for nickel-metal hydride (Ni/MH) batteries. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1979 / 1986

页数：8

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