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A novel carbon source coated on C-LiFePO4 as a cathode material for lithium-ion batteries

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Abstract

The poor electronic conductivity and low lithium-ion diffusion are the two major obstacles to the largely commercial application of LiFePO4 cathode material in power batteries. In order to improve the defects of LiFePO4, a novel carbon source polyacrylonitrile (PAN), which would form the hierarchical porous structure after carbonization, is fabricated and used. This work comes up with a simple and facile carbothermal reduction method to prepare porous-carbon-coated LiFePO4 (C-LiFePO4-PC) composite and to study the effect of carbon-coated temperature on ameliorating the electrochemical performance. The obtained C-LiFePO4-PC composite shows a high initial discharge capacity of 164.1 mA h g−1 at 0.1 C and good cycling stability as well as excellent rate capacity (49.0 mA h g−1 at 50 C). The most possible factors that improve the electrochemical performance could be related to the enhancement of electronic conductivity and the existence of porous carbon layers. In a word, the C-LiFePO4-PC material would become an excellent candidate for application in the fields of lithium-ion batteries.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (no. 51362018, 21163010) and the Key Project of Chinese Ministry of Education (no. 212183).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, People’s Republic of China

    Ming Shi, Ling-Bin Kong, Jin-Bei Liu, Kun Yan, Jia-Jia Li & Yan-Hua Dai

  2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, People’s Republic of China

    Ling-Bin Kong, Yong-Chun Luo & Long Kang

Authors
  1. Ming Shi
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  2. Ling-Bin Kong
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  3. Jin-Bei Liu
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  4. Kun Yan
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  6. Yan-Hua Dai
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  7. Yong-Chun Luo
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  8. Long Kang
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Correspondence to Ling-Bin Kong.

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Shi, M., Kong, LB., Liu, JB. et al. A novel carbon source coated on C-LiFePO4 as a cathode material for lithium-ion batteries. Ionics 22, 185–192 (2016). https://doi.org/10.1007/s11581-015-1549-1

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  • DOI: https://doi.org/10.1007/s11581-015-1549-1

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