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Towards long-life 500 Wh kg−1 lithium metal pouch cells via compact ion-pair aggregate electrolytes

Author

Listed:
  • Yulin Jie

    (University of Science and Technology of China)

  • Shiyang Wang

    (Peking University)

  • Suting Weng

    (Chinese Academy of Sciences)

  • Yue Liu

    (Soochow University)

  • Ming Yang

    (Tianjin Institute of Power Sources)

  • Chao Tang

    (University of Science and Technology of China
    Ningde Amperex Technology)

  • Xinpeng Li

    (University of Science and Technology of China)

  • Zhengfeng Zhang

    (Beijing University of Technology)

  • Yuchen Zhang

    (University of Science and Technology of China)

  • Yawei Chen

    (University of Science and Technology of China)

  • Fanyang Huang

    (University of Science and Technology of China)

  • Yaolin Xu

    (Helmholtz-Zentrum Berlin für Materialien und Energie)

  • Wanxia Li

    (University of Science and Technology of China)

  • Youzhang Guo

    (University of Science and Technology of China)

  • Zixu He

    (University of Science and Technology of China)

  • Xiaodi Ren

    (University of Science and Technology of China)

  • Yuhao Lu

    (Ningde Amperex Technology)

  • Ke Yang

    (Chinese Academy of Sciences)

  • Saichao Cao

    (Chinese Academy of Sciences)

  • He Lin

    (Chinese Academy of Sciences)

  • Ruiguo Cao

    (University of Science and Technology of China)

  • Pengfei Yan

    (Beijing University of Technology)

  • Tao Cheng

    (Soochow University)

  • Xuefeng Wang

    (Chinese Academy of Sciences
    Tianmu Lake Institute of Advanced Energy Storage Technologies)

  • Shuhong Jiao

    (University of Science and Technology of China)

  • Dongsheng Xu

    (Peking University)

Abstract

The development of practical lithium metal cells is plagued by their limited lifespan, primarily due to the poor interfacial stability of the electrolytes. Here we present a compact ion-pair aggregate (CIPA) electrolyte that enables high-performance Li metal pouch cells under lean electrolyte conditions. The electrolyte features a unique nanometre-scale solvation structure in which ion pairs are densely packed to form large CIPAs, in contrast to conventional electrolytes that comprise small aggregates. Notably, the CIPAs facilitate fast interfacial reduction kinetics on the Li metal anode via a collective electron-transfer process, leading to the formation of a stable interface. A 505.9 Wh kg−1 Li metal pouch cell with a high-nickel-content cathode (LiNi0.905Co0.06Mn0.035O2) exhibited a 91% energy retention after 130 cycles. This work demonstrates nanostructured electrolyte design for realizing high-performance Li metal batteries. It also showcases the importance of understanding interfacial reaction mechanisms in the design and development of electrolytes.

Suggested Citation

  • Yulin Jie & Shiyang Wang & Suting Weng & Yue Liu & Ming Yang & Chao Tang & Xinpeng Li & Zhengfeng Zhang & Yuchen Zhang & Yawei Chen & Fanyang Huang & Yaolin Xu & Wanxia Li & Youzhang Guo & Zixu He & X, 2024. "Towards long-life 500 Wh kg−1 lithium metal pouch cells via compact ion-pair aggregate electrolytes," Nature Energy, Nature, vol. 9(8), pages 987-998, August.
    • Handle: RePEc:nat:natene:v:9:y:2024:i:8:d:10.1038_s41560-024-01565-z
    DOI: 10.1038/s41560-024-01565-z
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