Electrochemical performance of amorphous-silicon thin films for lithium rechargeable batteries |
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| Affiliation: | 1. Department of Materials Science and Engineering, Feng Chia University, Taichung, Taiwan;2. Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan;1. Department of Metallurgical and Materials Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey;2. Energy Systems Division, Argonne National Laboratory, Argonne, IL 60439, USA;3. Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439, USA |
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| Abstract: | The effect of deposition temperature and film thickness on the electrochemical performance of amorphous-Si thin films deposited on a copper foil is studied. The electrochemical properties show optimum conditions at 200 °C deposition, and thinner films exhibit superior electrochemical performance than thicker ones. A film of 200 nm Si deposited at 200 °C exhibits excellent cycleability with a specific capacity of ～3000 mAh g?1. This is probably due to optimization between the strong adhesion by Si/Cu interdiffusion and the film stress. |
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