期刊
THIN SOLID FILMS
卷 518, 期 22, 页码 6590-6597出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2010.03.045
关键词
Ge-based anode; Ge-Mo; Negative electrode; Anode; Full cell; Lithium ion batteries
类别
资金
- National Research Foundation of Korea [2002-0037333] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Amorphous germanium and germanium-based films are sputter-deposited as anodes for lithium ion batteries. The structures of Ge and Ge-Mo composites are investigated using an X-ray diffractometer (XRD) and transmission electron microscopy (TEM). The surface morphologies of the electrodes are observed using a field emission scanning electron microscope (FESEM). In order to determine the influence of inactive material in the anode, cell tests are carried out on half cells (Ge/Li metal and GexMo1-x/Li metal) and full cells (Ge/LiCoO2 and GexMo1-x/LiCoO2). The Ge film electrodes prepared on rough copper foil substrates showed stable capacities of 1000 rnA h g(-1) over 50 cycles. The Ge0.88Mo0.12 composite film electrode showed reversible gravimetric capacities of up to 1000 mA h g(-1) with 77.9% capacity retention rates of the half-cell test after 100 cycles. Therefore, it may be possible to fabricate Ge-based anode materials with high capacity and improved capacity retention. The results of this study suggest that sputtered Ge-based electrodes are promising anode materials for next generation lithium ion batteries. (C) 2010 Elsevier B.V. All rights reserved.
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