Silicon lithium-ion battery anode with enhanced performance:Multiple effects of silver nanoparticles
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第10期
论文作者：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
文章页码：1902 - 1911
摘 要：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 m A 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.
Shanshan Yin1,2，Qing Ji1,3，Xiuxia Zuo1，Shuang Xie1，Kai Fang4，Yonggao Xia1，Jinlong Li1，Bao Qiu1，Meimei Wang1，Jianzhen Ban4，Xiaoyan Wang1，Yi Zhang1,2，Ying Xiao1，Luyao Zheng1，Suzhe Liang1,2，Zhaoping Liu1，Cundong Wang2，Ya-Jun Cheng1,5
1. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences2. North University of China3. The University of Nottingham Ningbo China4. Nano Science and Technology Institute, University of Science and Technology of China5. Department of Materials, University of Oxford
摘 要：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 m A 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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