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Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode

Author

Listed:
  • Pengfei Yan

    (Pacific Northwest National Laboratory
    Beijing University of Technology)

  • Jianming Zheng

    (Pacific Northwest National Laboratory)

  • Tianwu Chen

    (Pennsylvania State University)

  • Langli Luo

    (Pacific Northwest National Laboratory)

  • Yuyuan Jiang

    (Beijing University of Technology)

  • Kuan Wang

    (Beijing University of Technology)

  • Manling Sui

    (Beijing University of Technology)

  • Ji-Guang Zhang

    (Pacific Northwest National Laboratory)

  • Sulin Zhang

    (Pennsylvania State University)

  • Chongmin Wang

    (Pacific Northwest National Laboratory)

Abstract

Electrochemically driven functioning of a battery inevitably induces thermal and mechanical effects, which in turn couple with the electrochemical effect and collectively govern the performance of the battery. However, such a coupling effect, whether favorable or detrimental, has never been explicitly elucidated. Here we use in situ transmission electron microscopy to demonstrate such a coupling effect. We discover that thermally perturbating delithiated LiNi0.6Mn0.2Co0.2O2 will trigger explosive nucleation and propagation of intragranular cracks in the lattice, providing us a unique opportunity to directly visualize the cracking mechanism and dynamics. We reveal that thermal stress associated with electrochemically induced phase inhomogeneity and internal pressure resulting from oxygen release are the primary driving forces for intragranular cracking that resembles a “popcorn” fracture mechanism. The present work reveals that, for battery performance, the intricate coupling of electrochemical, thermal, and mechanical effects will surpass the superposition of individual effects.

Suggested Citation

  • Pengfei Yan & Jianming Zheng & Tianwu Chen & Langli Luo & Yuyuan Jiang & Kuan Wang & Manling Sui & Ji-Guang Zhang & Sulin Zhang & Chongmin Wang, 2018. "Coupling of electrochemically triggered thermal and mechanical effects to aggravate failure in a layered cathode," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04862-w
    DOI: 10.1038/s41467-018-04862-w
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    Cited by:

    1. Chuanlai Liu & Franz Roters & Dierk Raabe, 2024. "Role of grain-level chemo-mechanics in composite cathode degradation of solid-state lithium batteries," Nature Communications, Nature, vol. 15(1), pages 1-18, December.
    2. Shaofeng Li & Guannan Qian & Xiaomei He & Xiaojing Huang & Sang-Jun Lee & Zhisen Jiang & Yang Yang & Wei-Na Wang & Dechao Meng & Chang Yu & Jun-Sik Lee & Yong S. Chu & Zi-Feng Ma & Piero Pianetta & Ji, 2022. "Thermal-healing of lattice defects for high-energy single-crystalline battery cathodes," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    3. Kai Wang & Zhenqi Gu & Zhiwei Xi & Lv Hu & Cheng Ma, 2023. "Li3TiCl6 as ionic conductive and compressible positive electrode active material for all-solid-state lithium-based batteries," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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