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Achieving long cycle life for all-solid-state rechargeable Li-I2 battery by a confined dissolution strategy

Author

Listed:
  • Zhu Cheng

    (Nanjing University)

  • Hui Pan

    (Nanjing University)

  • Fan Li

    (Dalian National Lab for Clean Energy, State Key Laboratory of Catalysis, Dalian Institute of Chemical physics, Chinese Academy of Sciences)

  • Chun Duan

    (Nanjing University)

  • Hang Liu

    (Nanjing University)

  • Hanyun Zhong

    (Nanjing University)

  • Chuanchao Sheng

    (Nanjing University)

  • Guangjin Hou

    (Dalian National Lab for Clean Energy, State Key Laboratory of Catalysis, Dalian Institute of Chemical physics, Chinese Academy of Sciences)

  • Ping He

    (Nanjing University)

  • Haoshen Zhou

    (Nanjing University)

Abstract

Rechargeable Li-I2 battery has attracted considerable attentions due to its high theoretical capacity, low cost and environment-friendliness. Dissolution of polyiodides are required to facilitate the electrochemical redox reaction of the I2 cathode, which would lead to a harmful shuttle effect. All-solid-state Li-I2 battery totally avoids the polyiodides shuttle in a liquid system. However, the insoluble discharge product at the conventional solid interface results in a sluggish electrochemical reaction and poor rechargeability. In this work, by adopting a well-designed hybrid electrolyte composed of a dispersion layer and a blocking layer, we successfully promote a new polyiodides chemistry and localize the polyiodides dissolution within a limited space near the cathode. Owing to this confined dissolution strategy, a rechargeable and highly reversible all-solid-state Li-I2 battery is demonstrated and shows a long-term life of over 9000 cycles at 1C with a capacity retention of 84.1%.

Suggested Citation

  • Zhu Cheng & Hui Pan & Fan Li & Chun Duan & Hang Liu & Hanyun Zhong & Chuanchao Sheng & Guangjin Hou & Ping He & Haoshen Zhou, 2022. "Achieving long cycle life for all-solid-state rechargeable Li-I2 battery by a confined dissolution strategy," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-021-27728-0
    DOI: 10.1038/s41467-021-27728-0
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