In-situ dilatometric study of Metal/Si multilayer film electrodes |
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Authors: | Huaijian Pan Jing Zhang Xiangdong Zhuo |
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Affiliation: | a State Key laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of chemistry and chemical engineering, Xiamen University, Xiamen, 361005, PR Chinab Department of Chemistry, Binzhou University, Binzhou, 256600, PR China |
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Abstract: | Silicon film and Metal/Si multilayer films of three different metals, Ti, Al and Zn, were prepared via magnetron sputtering. The electrochemical performance of these films was investigated, with a focus on the Li+ intercalation behaviour, using Auger electron spectroscopy and in-situ electrochemical dilatometry. Comparative studies of silicon film electrodes and Metal/Si multilayer film electrodes were also made. The results of in-situ electrochemical dilatometry indicate that Metal/Si multilayer film electrodes expand significantly less than silicon film electrodes when a similar amount of lithium ions are intercalated. Among films with a similar, sandwich-like structure, Ti/Si films exhibit the least volume expansion; whereas those composed of Al/Si films expand the most. Moreover, the expansion rates of multilayer film electrodes are slower than silicon film electrodes. |
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Keywords: | Metal/Si multilayer film Thin-film battery Lithium battery Dilatometry Thin-film anode |
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