Table of Contents Author Guidelines Submit a Manuscript
Journal of Nanomaterials
Volume 2013, Article ID 638953, 6 pages
http://dx.doi.org/10.1155/2013/638953
Research Article

Improvement of Charge-Discharge Characteristics of the Mg-Ni Powder Electrodes at 55°C

1The Instrument Center, National Cheng Kung University, Tainan 701, Taiwan
2Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan

Received 17 September 2013; Revised 15 November 2013; Accepted 18 November 2013

Academic Editor: Ting-Jen Hsueh

Copyright © 2013 Kuan-Jen Chen et al. 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.

Abstract

Magnesium-nickel (Mg-Ni) powders are used as the anode materials for secondary lithium (Li) ion batteries. Mg-Ni powders with ratios of 1 : 1 (Mg : Ni) are prepared and their structure and electrochemical behavior at room temperature and 55°C are investigated. The results show that adding Ni powders to Mg powders can reduce the charge-discharge capacities and improve cycling life. In charge-discharge cycle testing at 55°C, the Li ion concentration gradually increased with increasing the duration of electrochemical reactions, indicating that the charge-discharge capacities increase with increment of cycling number. The formation of a solid electrolyte interface (SEI) layer restrains Mg ions from dissolving into the electrolyte and thus improves the charge-discharge capacities at high temperature.