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Synergetic effects of blended materials for Lithium-ion batteries

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Abstract

LiNi1/3Co1/3Mn1/3O2, LiMn2O4 and LiCoO2 are paired to make the blended materials for the cathode of lithium-ion batteries. The factors impacting on the characteristics of blended materials are studied using constant current charge/discharge measurement and electrochemical impedance spectroscopy. The results show that the three pairs of blended materials exhibit very different synergetic effects in high C-rate discharging. The mechanism of particle synergetic effect has a physical root on the compensating material property of blending components, which fundamentally correlates with their similarity and difference in crystalline and electronic structures. The AC impedance show the obvious changes that alternate the high C-rate performance, due to reduced particle impedance in blended materials. The pairs of LiNi1/3Co1/3Mn1/3O2-LiMn2O and LiCoO2-LiMn2O4 present obvious increases in high C-rate reversible capacities than does the pair LiCoO2-LiNi1/3Co1/3Mn1/3O2.

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Authors and Affiliations

  1. Department of Physics, Shanghai University, Shanghai, 200444, China

    Heng Ren & YanQun Guo

  2. Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, China

    Heng Ren, ZhenLian Chen, XianHui Zhang, ZhiFeng Zhang & Jun Li

  3. Guangdong Keprime Enerstore Ltd, Guangzhou, 510530, China

    YanTu Li & QingGang Zhang

  4. ZhejiangWELLY Energy Corporation, Cixi, 315301, China

    QingGuo Wu

Authors
  1. Heng Ren
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  2. YanQun Guo
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  4. XianHui Zhang
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  9. Jun Li
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Correspondence to Jun Li.

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Ren, H., Guo, Y., Chen, Z. et al. Synergetic effects of blended materials for Lithium-ion batteries. Sci. China Technol. Sci. 59, 1370–1376 (2016). https://doi.org/10.1007/s11431-016-0255-6

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  • DOI: https://doi.org/10.1007/s11431-016-0255-6

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