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An investigation into compressive deformation and failure mechanisms in a novel Li-ion solid-state electrolyte

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Abstract

Solid-state batteries are generally considered to be safer than their liquid-state counterparts due to their decreased potential for fire or short circuiting. The fabrication of solid-state batteries relies on the application of stack crimping pressure that increases the interfacial surface contacts between electrolytes and the electrodes. However, excessive compressive crimping stresses (that occur in cell assembly) can give rise to cracking phenomena that can degrade battery performance and lead to thermal runaway or failure. It is, therefore, important to develop an understanding of failure mechanisms in solid-state Li-ion electrolytes. In this paper, we use a combination of in-situ optical microscopy and Digital Imaging Correlation (strain mapping) techniques to study compressive deformation and cracking phenomena in a novel solid-state Li-ion electrolyte. The stress states associated with the different stages of compressive deformation are also presented along with those due to charge–discharge cycles. The implications of the results are discussed for the material design of robust solid-state Li ion batteries.

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Data availability

The data that support the findings of this study are available from the corresponding author on request.

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Acknowledgments

The work was funded and supported by the GEM Fellowship, IBM CVFA team, Worcester Polytechnic Institute. Special thanks to Reisya Ichiwani, Deborah Oyewole, and Vanessa Uzonwanne for their technical support.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA

    Tofunmi Ogunfunmi, Ridwan Ahmed, Oluwaseun Oyewole & Wole Soboyejo

  2. Department of Materials Science and Engineering, African University of Science and Engineering, Km 10 Airport Road, Galadimawa, Abuja, Federal Capital Territory, Nigeria

    Nnaemeka Ebechidi & Wole Soboyejo

  3. Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, MA, 01609, USA

    Oluwaseun Oyewole, John Obayemi & Wole Soboyejo

Authors
  1. Tofunmi Ogunfunmi
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  2. Nnaemeka Ebechidi
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  3. Ridwan Ahmed
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  4. Oluwaseun Oyewole
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  5. John Obayemi
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  6. Wole Soboyejo
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Corresponding author

Correspondence to Tofunmi Ogunfunmi.

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Ogunfunmi, T., Ebechidi, N., Ahmed, R. et al. An investigation into compressive deformation and failure mechanisms in a novel Li-ion solid-state electrolyte. MRS Advances 6, 154–161 (2021). https://doi.org/10.1557/s43580-021-00014-3

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  • DOI: https://doi.org/10.1557/s43580-021-00014-3

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