Silicon lithium-ion battery anode with enhanced performance: Multiple effects of silver nanoparticles |
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| Authors: | Shanshan Yin Qing Ji Xiuxia Zuo Shuang Xie Kai Fang Yonggao Xia Jinlong Li Bao Qiu Meimei Wang Jianzhen Ban Xiaoyan Wang Yi Zhang Ying Xiao Luyao Zheng Suzhe Liang Zhaoping Liu Cundong Wang Ya-Jun Cheng |
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| Affiliation: | 1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China;2. North University of China, Taiyuan, 030051, China;3. The University of Nottingham Ningbo China, Ningbo, 315100, China;4. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, 215123, China;5. Department of Materials, University of Oxford, Parks Rd., OX1 3PH, Oxford, UK |
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| Abstract: | Silicon has been regarded as one of the most promising next generation lithium-ion battery anode. However, the poor cyclic stability of the Si based anode has severely limited its practical applications, which is even worse with high mass loading density (>1?mg?cm?2). A new concept has been developed to enhance the electrochemical performance of the Si nanoparticle anode. Silver nanoparticles are composited with the silicon nanoparticles in a facile way for the first time. It is found that the mechanical properties of the Si electrode have been significantly improved by the incorporation of the silver nanoparticles, leading to enhanced cyclic performance. With the Si/Ag mass ratio of 4:1, the reversible specific discharge capacity is retained as 1156?mA?h?g?1 after 100 cycles at 200?mA?g?1, which is more than three times higher than that of the bare silicon (318?mA?h?g?1). The rate performance has been effectively improved as well due to excellent electron conductivity of the silver nanoparticles. |
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| Keywords: | Silicon Silver Nanoparticles Nanocomposite Lithium-ion battery Anode |
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