Distinctive slit-shaped porous carbon encapsulating phosphorus as a promising anode material for lithium batteries |
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| Authors: | Jiaoyang Li Li Wang Yumei Ren Yong Zhang Youfu Wang Aiguo Hu Xiangming He |
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| Institution: | 1.Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing,People’s Republic of China;2.Jiangsu Huadong Institute of Li-ion Battery,Zhangjiagang,People’s Republic of China;3.Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering,East China University of Science and Technology,Shanghai,People’s Republic of China |
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| Abstract: | A distinctive structure of carbon materials for Li-ion batteries is proposed for the preparation of red phosphorus-carbon composites. The slit-shaped porous carbon is observed with aggregation of plate-like particles, whose isotherm belongs to the H3 of type IV. The density functional theory (DFT) method reveals the presence of micro-mesopores in the 0.5–5 nm size range. The unique size distribution plays an important role in adsorbing phosphorus and electrochemical performance. The phosphorus-slit-shaped porous carbon composite shows initial capacity of 2588 mAh g?1, reversible capacity of 1359 mAh g?1 at a current density of 100 mA g?1. It shows an excellent coulombic efficiency of ～99 % after 50 cycles. |
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