A Composite Structure of Cu3Ge/Ge/C Anode Promise Better Rate Property for Lithium Battery |
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| Authors: | Jianwen Liang Xiaona Li Zhiguo Hou Jun Jiang Lei Hu Wanqun Zhang Yongchun Zhu Yitai Qian |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, P. R. China;2. Hefei National Laboratory for Physical Science at Micro‐scale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, P. R. China |
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| Abstract: | Much effort has been made to search for high energy and high power density electrode materials for lithium ion batteries. Here, a composite structure among Ge, C and Cu3Ge in Cu3Ge/Ge/C materials with a high rate performance of lithium batteries has been reported. Such Cu3Ge/Ge/C composite is synthesized through the in‐situ formation of Ge, C and Cu3Ge by one‐pot reaction. Density function theory (DFT) calculations and electrochemical impedance spectroscopy (EIS) suggest a higher electron mobility of the hibrid Cu3Ge/Ge/C composites through the in‐situ preparation. As a result, remarkable charge rate over 300 C (fast delithiated capability) and outstanding cycling stability (≈0.02% capacity decay per cycle for 500 cycles at 0.5 C) are achieved for the Cu3Ge/Ge/C composites anode. These Cu3Ge/Ge/C composites demonstrate another perspective to explore the energy storage materials and should provide a new pathway for the design of advanced electrode materials. |
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| Keywords: | composite structures Cu3Ge/Ge/C composites germanium lithium batteries rate performance |
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