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Batteries 2015, 1(1), 3-10; doi:10.3390/batteries1010003

Effects of Cu Substitution for Sn on the Electrochemical Performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5xCuxNi3.8 (x = 0–0.5) Alloys for Ni-MH Batteries

1
Materials Science and Technology Center, Nuclear and Energy Research Institute, University of São Paulo, SP 05508-900, Brazil
2
Institute for Semiconducting and Electronic Materials, University of Wollongong, North Wollongong, NSW 2522, Australia
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Joeri Van Mierlo
Received: 24 June 2015 / Accepted: 2 September 2015 / Published: 11 September 2015
(This article belongs to the Special Issue Rechargeable Battery Technologies--From Materials to Applications)
View Full-Text   |   Download PDF [636 KB, uploaded 11 September 2015]   |  

Abstract

The effects of substitution of Cu for Sn on the electrochemical discharge capacity performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5xCuxNi3.8 (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). View Full-Text
Keywords: hydrogen storage alloys; nickel metal hydride (Ni-MH) batteries; rare earth alloys; discharge capacity hydrogen storage alloys; nickel metal hydride (Ni-MH) batteries; rare earth alloys; discharge capacity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Casini, J.C.S.; Guo, Z.; Liu, H.K.; Faria, R.N.; Takiishi, H. Effects of Cu Substitution for Sn on the Electrochemical Performance of La0.7Mg0.3Al0.3Mn0.4Sn0.5xCuxNi3.8 (x = 0–0.5) Alloys for Ni-MH Batteries. Batteries 2015, 1, 3-10.

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