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Quantification of the Li-ion diffusion over an interface coating in all-solid-state batteries via NMR measurements

Author

Listed:
  • Ming Liu

    (Delft University of Technology)

  • Chao Wang

    (Delft University of Technology)

  • Chenglong Zhao

    (Delft University of Technology
    Tsinghua University)

  • Eveline Maas

    (Delft University of Technology)

  • Kui Lin

    (Tsinghua University)

  • Violetta A. Arszelewska

    (Delft University of Technology)

  • Baohua Li

    (Tsinghua University)

  • Swapna Ganapathy

    (Delft University of Technology)

  • Marnix Wagemaker

    (Delft University of Technology)

Abstract

A key challenge for solid-state-batteries development is to design electrode-electrolyte interfaces that combine (electro)chemical and mechanical stability with facile Li-ion transport. However, while the solid-electrolyte/electrode interfacial area should be maximized to facilitate the transport of high electrical currents on the one hand, on the other hand, this area should be minimized to reduce the parasitic interfacial reactions and promote the overall cell stability. To improve these aspects simultaneously, we report the use of an interfacial inorganic coating and the study of its impact on the local Li-ion transport over the grain boundaries. Via exchange-NMR measurements, we quantify the equilibrium between the various phases present at the interface between an S-based positive electrode and an inorganic solid-electrolyte. We also demonstrate the beneficial effect of the LiI coating on the all-solid-state cell performances, which leads to efficient sulfur activation and prevention of solid-electrolyte decomposition. Finally, we report 200 cycles with a stable capacity of around 600 mAh g−1 at 0.264 mA cm−2 for a full lab-scale cell comprising of LiI-coated Li2S-based cathode, Li-In alloy anode and Li6PS5Cl solid electrolyte.

Suggested Citation

  • Ming Liu & Chao Wang & Chenglong Zhao & Eveline Maas & Kui Lin & Violetta A. Arszelewska & Baohua Li & Swapna Ganapathy & Marnix Wagemaker, 2021. "Quantification of the Li-ion diffusion over an interface coating in all-solid-state batteries via NMR measurements," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-26190-2
    DOI: 10.1038/s41467-021-26190-2
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    References listed on IDEAS

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    1. Chuang Yu & Swapna Ganapathy & Ernst R. H. van Eck & Heng Wang & Shibabrata Basak & Zhaolong Li & Marnix Wagemaker, 2017. "Accessing the bottleneck in all-solid state batteries, lithium-ion transport over the solid-electrolyte-electrode interface," Nature Communications, Nature, vol. 8(1), pages 1-9, December.
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