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Li0.99Ti0.01FePO4/C composite as cathode material for lithium ion battery

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Abstract

Three kinds of LiFePO4 materials, mixed with carbon (as LiFePO4/C), doped with Ti (as Li0.99Ti0.01FePO4), and treated both ways (as Li0.99Ti0.01FePO4/C composite), were synthesized via ball milling by solid-state reaction method. The crystal structure and electrochemical behavior of the materials were investigated using X-ray diffraction, SEM, TEM, cyclic voltammetry, and charge/discharge cycle measurements. It was found that the electrochemical behavior of LiFePO4 could be increased by carbon coating and Ti-doping methods. Among the materials, Li0.99Ti0.01FePO4/C composite presents the best electrochemical behavior, with an initial discharge capacity of 154.5 mAh/g at a discharge rate of 0.2 C, and long charge/discharge cycle life. After 120 cycles, its capacity remains at 92% of the initial capacity. The Li0.99Ti0.01FePO4/C composite developed here can be used as the cathode material for lithium ion batteries.

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Acknowledgement

This work was supported by the National Nature Science Foundation of China.

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Authors and Affiliations

  1. Department of Chemistry, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, 200433, People’s Republic of China

    Guan Wang, Yan Cheng, Manming Yan & Zhiyu Jiang

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  1. Guan Wang
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  2. Yan Cheng
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  3. Manming Yan
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  4. Zhiyu Jiang
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Correspondence to Zhiyu Jiang.

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Wang, G., Cheng, Y., Yan, M. et al. Li0.99Ti0.01FePO4/C composite as cathode material for lithium ion battery. J Solid State Electrochem 11, 457–462 (2007). https://doi.org/10.1007/s10008-006-0173-4

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  • DOI: https://doi.org/10.1007/s10008-006-0173-4

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