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

• Main Authors: Kuan-Jen Chen, Fei-Yi Hung, Truan-Sheng Lui, Ren-Syuan Xiao
• Format: Article
• Language: English
• Published: Hindawi Limited 2013-01-01
• Series: Journal of Nanomaterials
• Online Access: http://dx.doi.org/10.1155/2013/638953

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.