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Thermal runaway prevention through scalable fabrication of safety reinforced layer in practical Li-ion batteries

Author

Listed:
  • In Taek Song

    (Platform Technology Research Center)

  • Joonkoo Kang

    (Platform Technology Research Center)

  • Jongkwan Koh

    (Platform Technology Research Center)

  • Hyunju Choi

    (Platform Technology Research Center)

  • Heemyeong Yang

    (Platform Technology Research Center)

  • Eunkyung Park

    (Platform Technology Research Center)

  • Jina Lee

    (Pohang University of Science and Technology (POSTECH))

  • Woohyung Cho

    (LG Energy Solution)

  • Yu-mi Lee

    (LG Energy Solution)

  • Seokkyeong Lee

    (LG Energy Solution)

  • Noma Kim

    (Platform Technology Research Center)

  • Minah Lee

    (Pohang University of Science and Technology (POSTECH))

  • Kihwan Kim

    (Platform Technology Research Center)

Abstract

Integrating safety features to cut off excessive current during accidental internal short circuits in Li-ion batteries (LIBs) can reduce the risk of thermal runaway. However, making this concept practical requires overcoming challenges in both material development and scalable manufacturing. Here, we demonstrate the roll-to-roll production of a safety reinforced layer (SRL) on current collectors at a rate of 5 km per day. The SRL, made of molecularly engineered polythiophene (PTh) and carbon additives, interrupts current flow during voltage drops or overheating without adversely affecting battery performance. Impact testing on 3.4-Ah pouch cells shows that the SRL reduces battery explosions from 63% to 10%. This work underscores the potential of integrating material science with manufacturing technology to enhance battery safety.

Suggested Citation

  • In Taek Song & Joonkoo Kang & Jongkwan Koh & Hyunju Choi & Heemyeong Yang & Eunkyung Park & Jina Lee & Woohyung Cho & Yu-mi Lee & Seokkyeong Lee & Noma Kim & Minah Lee & Kihwan Kim, 2024. "Thermal runaway prevention through scalable fabrication of safety reinforced layer in practical Li-ion batteries," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52766-9
    DOI: 10.1038/s41467-024-52766-9
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    References listed on IDEAS

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    1. Zheng Chen & Po-Chun Hsu & Jeffrey Lopez & Yuzhang Li & John W. F. To & Nan Liu & Chao Wang & Sean C. Andrews & Jia Liu & Yi Cui & Zhenan Bao, 2016. "Fast and reversible thermoresponsive polymer switching materials for safer batteries," Nature Energy, Nature, vol. 1(1), pages 1-2, January.
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