Study on surface modification of AB5-type alloy electrode with polyaniline by electroless deposition
2010; Elsevier BV; Volume: 56; Issue: 2 Linguagem: Inglês
10.1016/j.electacta.2010.09.040
ISSN1873-3859
AutoresWenzhuo Shen, Shumin Han, Yuan Li, Jianzheng Song, Qi Tong,
Tópico(s)Supercapacitor Materials and Fabrication
ResumoA new polyaniline (PANI)-coated technique was adopted for a AB5-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.
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