期刊
APPLIED SURFACE SCIENCE
卷 258, 期 17, 页码 6316-6320出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2012.03.029
关键词
Hydrogen storage alloy; Polyaniline; Surface treatment; Electrochemical characteristics; Kinetics
类别
资金
- National Natural Science Foundation of China [51171165]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars of Hebei Province [20100501]
A new polyaniline (PANI)-coated technique is adopted for the La-Mg-Ni-based alloy La0.80Mg0.20Ni2.70Mn0.10Co0.55Al0.10 in order to advance its electrochemical kinetic characteristics. In this treatment, the aniline monomers are electroplated on the alloy particles to form polyaniline films. FE-SEM observation and UV-vis analysis results revealed that the coral-like atrovirens PANI particles are deposited on the surface of the alloy. Through the PANI-coating the capacity retention rate at the 200th cycle of the La-Mg-Ni-based alloy electrodes amounts up from original 82.3% to 86.4% and the high rate discharge ability increased from 24.7% to 35.6% at a discharge current density of 1500 mA g(-1). Linear polarization, anodic polarization and cyclic voltammetry measurements suggest that charge-transfer resistance decreases and the hydrogen absorption rate of the alloys increases after PANI-coating. (C) 2012 Elsevier B.V. All rights reserved.
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