Comparative analysis of different separators for the electrochemical performances and long-term stability of high-power lithium-ion batteries


As a critical component, high-performance separator is in urgent demand for the development of high-power lithium-ion battery (LIB). Herein, five commercial separators including cellulose, polyethylene terephthalate (PET), aramid nonwovens, and polypropylene (PP) and polypropylene/polypropylene (PP/PP) polyolefin membranes were investigated and used as high-power LIB separators. Due to the high porosity (70%), low air permeability, high electrolyte uptake and ionic conductivity (1.37 mS cm−1), excellent electrolyte wettability, and good heat resistance for cellulose separator, the corresponding LIBs exhibit the best comprehensive performance with low resistance, good rate capability of 91.8% retention at 10 C, long-term stability at 65 °C, and high capacity retention of 95.5% after 2000 cycles, indicating the promising application in LIBs with high power and long-term stability.

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This work is financially supported by the Project of Science and Technology Commission of Shanghai Municipality (19DZ1203102, 18DZ1201604, 17DZ1201403) and the Shanghai Professional and Technical Service Platform for Science and Technology Commission of Shanghai Municipality (19DZ2292400). The authors also wish to thank Shanghai Aowei Technology development Co., Ltd.

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Correspondence to Chongyang Yang or Jiaqiang Xu.

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Wu, M., Yang, C., Xia, H. et al. Comparative analysis of different separators for the electrochemical performances and long-term stability of high-power lithium-ion batteries. Ionics (2021).

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  • Lithium-ion battery
  • Separator
  • Fast-charging
  • High-power
  • Long-term stability