Study on surface modification of AB5-type alloy electrode with polyaniline by electroless deposition

被引：31
作者：
Shen, Wenzhuo [1 ]
Han, Shumin [1 ,2 ]
Li, Yuan [1 ]
Song, Jianzheng [1 ]
Tong, Qi [1 ]
机构：
[1] Yanshan Univ, Coll Environm & Chem Engn, Qinhuangdao 066004, Peoples R China
[2] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2010年 / 56卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Hydrogen storage alloy; PANI; Electroless deposition; Electrochemical characteristics; Kinetics; METAL HYDRIDE ELECTRODES; HYDROGEN STORAGE ALLOYS; NEGATIVE ELECTRODES; IMPEDANCE; BATTERIES; POLYMER;
D O I：
10.1016/j.electacta.2010.09.040
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A new polyaniline (PANI)-coated technique was adopted for a AB(5)-type alloy (La0.64Ce0.25Pr0.03Nd0.08Ni4.19Mn0.31Co0.42Al0.23) in order to improve its electrochemical and kinetic properties. FE-SEM observation and FT-IR analysis results revealed that the PANI electroless deposited to the surface of alloy particles. Through the PANI-coating the initial discharge capacity increased from 299 to 331 mAh/g and the high rate discharge ability (HRD) increased from 8.5 to 45.0% at discharge current density of 1440 mA/g. For kinetic properties, linear polarization, EIS, anodic polarization and cyclic voltammetry measurements suggested that charge-transfer resistance decreased and the hydrogen absorption rate of the alloys increased after PANI-coating. (C) 2010 Elsevier Ltd. All rights reserved.
引用
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页码：959 / 963
页数：5
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