Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.electacta.2011.11.116
Title: Influence of grain size on lithium storage performance of germanium oxide films
Authors: Feng, J.K. 
Lai, M.O. 
Lu, L. 
Keywords: Anode
Capacity
Electrochemical performance
Thin film
Issue Date: 15-Feb-2012
Citation: Feng, J.K., Lai, M.O., Lu, L. (2012-02-15). Influence of grain size on lithium storage performance of germanium oxide films. Electrochimica Acta 62 : 103-108. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2011.11.116
Abstract: Germanium oxide (GeO 2) films with two different grain sizes of 10 nm (GeO 2 (10 nm)) and 100 nm (GeO 2 (100 nm)) were grown via reactive radio frequency sputtering at different temperatures. Electrochemical measurements of the GeO 2 (10 nm) thin film used as an anode in Li ion rechargeable batteries show superior capacity retention and rate capability compared to those of GeO 2 (100 nm). The GeO 2 (10 nm) thin film possesses an initial capacity of 930 mAh g -1 with 89% capacity retention after 100 cycles, compared with 455 mAh g -1 with 53% of GeO 2 (100 nm) and 225 mAh g -1, 30% (10 cycles) of common macro-size GeO 2. Microstructural studies reveal that the GeO 2 (10 nm) thin film can better accommodate volume changes during Li-Ge alloying and de-alloying processes. © 2011 Elsevier Ltd.
Source Title: Electrochimica Acta
URI: http://scholarbank.nus.edu.sg/handle/10635/85316
ISSN: 00134686
DOI: 10.1016/j.electacta.2011.11.116
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