2010 Volume 78 Issue 7 Pages 611-614
In order to check the high rate performance of the Mg2Ge alloy in lithium batteries, the Mg2Ge anodes were prepared as thick films with different areas and/or thickness on copper foil substrates using an aerosol deposition method. A sample film with ca. φ 10 and a weight of 0.1 mg was generally obtained by one-shot deposit in our present equipment, which could be made wider or thicker by multiple shots. From the charge/discharge experiments with the current of more than 1 A g−1, the deposited films were found to work as anode active materials under high rate charge/discharge conditions for lithium secondary batteries, although we had some misgivings about capacity decay in case making films extremely thick. These results denoted that the Mg2Ge anode prepared by the aerosol-deposition method is valuable for development of a secondary battery with high energy and power densities.