Effects of Cu substitution for Sn on the electrochemical performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5−xCuxNi3.8 (x = 0-0.5) alloys for Ni-MH batteries

Authors

Julio Cesar Serafim Casini, University of São Paulo
Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
Rubens Nunes Faria, University of São Paulo
Hidetoshi Takiishi, University of São Paulo

RIS ID

102989

Publication Details

Casini, J. Serafim., Guo, Z., Liu, H. Kun., Faria, R. Nunes. & Takiishi, H. (2015). Effects of Cu substitution for Sn on the electrochemical performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5−xCuxNi3.8 (x = 0-0.5) alloys for Ni-MH batteries. Batteries, 1 (1), 3-10.

Abstract

The effects of substitution of Cu for Sn on the electrochemical discharge capacity performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5−xCuxNi3.8 (x = 0.0, 0.1, 0.2, 0.3, and 0.5) negative electrode alloys were investigated. Results indicate that increasing Cu content enhanced electrochemical behavior by increasing the maximum discharge capacity from 239.8 mA·h/g (x = 0) to 305.2 mA·h/g (x = 0.5), the discharge capacity retention at the 100th cycle from 78.0% (x = 0) to 81.8% (x = 0.5), and the high rate dischargeability (HRD) from 25.7% (x = 0) to 80.6% (x = 0.5).