| Influence of particle structure on electrochemical character of composite graphite |
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| 作者单位： | Cuiwei Du，Yujuan Zhao，Zhongbao Yu，Yinshun Wu，and Qingguo LiuSolid State Ionic Laboratory，University of Science and Technology Beijing，Beijing 100083，ChinaThe Center of Corrosion and Protection，University of Science and Technology Beijing，Beijing 100083，China |
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| 摘 要： | The natural graphite has been used as the anode material for Lithium-Ion batteries, because of its low cost, chemical stability and excellent reversibility for Li+ insertion. However, the slow diffusion rate of lithium ion and poor compatibility with electrolyte solutions make it difficult to use in some conditions. In order to solve these problems, an epoxy-coke/graphite composite has been manufactured. The particle of composite carbonaceous material coated on non-graphitizable (hard) carbon matrix. Due to the disordered structure, the diffusion rate of lithium species in the non-graphitzable carbon is remarkably fast and less anisotropic. The process for preparing a composite carbon powder provides a promising new anode material with superior electrochemical properties for Li-ion batteries. The unique structure of epoxy-coke/graphite composite electrodes results in much better kinetics, also better recharge ability and initial charge/discharge efficiency.
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Influence of particle structure on electrochemical character of composite graphite |
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| Authors: | Cuiwei DU Yujuan Zhao Zhongbao Yu Yinshun Wu Qingguo Liu |
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| Abstract: | The natural graphite has been used as the anode material for Lithium-Ion batteries, because of its low cost, chemical stability and excellent reversibility for Li+ insertion. However, the slow diffusion rate of lithium ion and poor compatibility with electrolyte solutions make it difficult to use in some conditions. In order to solve these problems, an epoxy-coke/graphite composite has been manufactured. The particle of composite carbonaceous material coated on non-graphitizable (hard) carbon matrix. Due to the disordered structure, the diffusion rate of lithium species in the non-graphitzable carbon is remarkably fast and less anisotropic. The process for preparing a composite carbon powder provides a promising new anode material with superior electrochemical properties for Li-ion batteries. The unique structure of epoxy-coke/graphite composite electrodes results in much better kinetics, also better recharge ability and initial charge/discharge efficiency. |
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| Keywords: | lithium-ion batteries negative materials natural graphite structure model |
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