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Designing phosphazene-derivative electrolyte matrices to enable high-voltage lithium metal batteries for extreme working conditions

Author

Listed:
  • Yuefeng Meng

    (Tsinghua University
    Tsinghua University)

  • Dong Zhou

    (Tsinghua University)

  • Ruliang Liu

    (Guangdong University of Education)

  • Yao Tian

    (Tsinghua University)

  • Yifu Gao

    (Tsinghua University
    Tsinghua University)

  • Yao Wang

    (Tsinghua University)

  • Bing Sun

    (University of Technology Sydney)

  • Feiyu Kang

    (Tsinghua University
    Tsinghua University)

  • Michel Armand

    (Alava Technology Park)

  • Baohua Li

    (Tsinghua University)

  • Guoxiu Wang

    (University of Technology Sydney)

  • Doron Aurbach

    (Bar-Ilan University)

Abstract

The current high-energy lithium metal batteries are limited by their safety and lifespan owing to the lack of suitable electrolyte solutions. Here we report a synergy of fluorinated co-solvent and gelation treatment by a butenoxycyclotriphosphazene (BCPN) monomer, which facilitates the use of ether-based electrolyte solutions for high-energy lithium metal batteries. We show that the safety risks of fire and electrolyte leakage are eliminated by the fluorinated co-solvent and fireproof polymeric matrices. The compatibility with high-energy cathodes is realized by a well-tailored Li+ solvation sheath, along with BCPN-derived protective surface films developed on the cathodes. Our Li | |LiNi0.8Co0.1Mn0.1O2 cells reach high-capacity retention, superior low-temperature performance, good cyclability under high pressure and steady power supply under abusive conditions. Our electrolyte design concept provides a promising path for high energetic, durable and safe rechargeable Li batteries.

Suggested Citation

  • Yuefeng Meng & Dong Zhou & Ruliang Liu & Yao Tian & Yifu Gao & Yao Wang & Bing Sun & Feiyu Kang & Michel Armand & Baohua Li & Guoxiu Wang & Doron Aurbach, 2023. "Designing phosphazene-derivative electrolyte matrices to enable high-voltage lithium metal batteries for extreme working conditions," Nature Energy, Nature, vol. 8(9), pages 1023-1033, September.
    • Handle: RePEc:nat:natene:v:8:y:2023:i:9:d:10.1038_s41560-023-01339-z
    DOI: 10.1038/s41560-023-01339-z
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