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Improve electrochemical performance of LiFePO4/C cathode by coating Ti2O3 through a facile route

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Abstract

In this paper, a facile method was conducted to obtain LiFePO4/C coated by Ti2O3. Firstly, TiO2-coating LiFePO4/C was gained via a sol–gel process then TiO2 was reduced to Ti2O3 by KBH4 heated to 370 °C for 20 h. The phase of the composite was confirmed to be LiFePO4 and Ti2O3 by X-ray diffraction. It was observed through SEM and TEM images that spot-like Ti2O3 particles were homogeneously distributed on the surface of LiFePO4/C with a particle size of 5~10 nm. The electrochemical performance of Ti2O3-coating LiFePO4/C composite material presented an obvious improvement in both specific capacity and cycling stability. EIS result showed that the obtained coated sample possesses a much lower charge transfer resistance compared with that of LiFePO4/C raw material. The experiment proved that Ti2O3 coating could enhance the performance of LiFePO4/C cathode for lithium-ion batteries.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Sichuan University, Chengdu, Sichuan, 610064, Peoples’ Republic of China

    Yaping Xu & Jian Mao

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  1. Yaping Xu
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  2. Jian Mao
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Correspondence to Jian Mao.

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Xu, Y., Mao, J. Improve electrochemical performance of LiFePO4/C cathode by coating Ti2O3 through a facile route. Ionics 21, 3159–3167 (2015). https://doi.org/10.1007/s11581-015-1521-0

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  • DOI: https://doi.org/10.1007/s11581-015-1521-0

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