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Co3(PO4)2-Coated LiV3O8 as positive materials for rechargeable lithium batteries

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Abstract

Co3(PO4)2-coated LiV3O8 has been successfully synthesized and used as positive material for rechargeable lithium batteries by a facile liquid phase method. The as-prepared powders were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and the galvanostatic discharge/charge experiments. As-prepared Co3(PO4)2-coated LiV3O8 forms a good layered structure with a poor cyrstallinity. SEM reveals that Co3(PO4)2-coated LiV3O8 has uniform particle distribution and reduced particle size when compared with bare one. The Co3(PO4)2 coating layer is about 33–59 nm forming a continuous lumps attached to LiV3O8 particle surface. Co3(PO4)2-coated LiV3O8 electrode shows increased capacity and more stable cycling. The first and 35th discharge capacities of the Co3(PO4)2-coated LiV3O8 electrode are 322.8 mAh g−1 and 235.7 mAh g−1 in the range of 4.0–1.8 V at a current rate of 30 mA g−1, respectively. The improved electrochemical performance is assigned to the greatly reduced LiV3O8 particle with uniform morphology. Co3(PO4)2-coating further benefits the phase transitions of LiV3O8 during discharge/ charge while preventing parasite reactions between electrode surface and electrolyte.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou, 450001, People’s Republic of China

    Ling-Ling Xie, Li-Qin You, Xiao-Yu Cao, Chao-Feng Zhang & Ling-Bo Qu

  2. Zhengzhou (China-Italy Cooperation) Key Laboratory of Clean Energy, Henan University of Technology, Zhengzhou, 450001, People’s Republic of China

    Ling-Ling Xie, Li-Qin You, Xiao-Yu Cao, Chao-Feng Zhang & Ling-Bo Qu

  3. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300381, People’s Republic of China

    Da-Wei Song

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  1. Ling-Ling Xie
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  2. Li-Qin You
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  3. Xiao-Yu Cao
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  4. Chao-Feng Zhang
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Correspondence to Xiao-Yu Cao.

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Xie, LL., You, LQ., Cao, XY. et al. Co3(PO4)2-Coated LiV3O8 as positive materials for rechargeable lithium batteries. Electron. Mater. Lett. 8, 411–415 (2012). https://doi.org/10.1007/s13391-012-2082-2

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  • DOI: https://doi.org/10.1007/s13391-012-2082-2

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