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Argyrodite solid electrolyte-coated graphite as anode material for all-solid-state batteries

  • Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)
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Journal of Sol-Gel Science and Technology Aims and scope Submit manuscript

Abstract

All-solid-state batteries based on sulfide solid electrolytes are potential candidates for applications such as electric vehicles. One of the challenges for the realization of the all-solid-state battery is the construction of composite electrodes with favorable lithium and electron conductive pathways. Here, we prepared an argyrodite type Li6PS5Cl-based solid electrolyte (LiPSCl)-coated graphite (Gr:LiPSCl, 64:36 weight ratio) by a dissolution-reprecipitation process and investigate its use as anode material for all-solid-state batteries. The addition of a carbon additive (acetylene black, 0.5, 1 and 2 weight ratio) to LiPSCl-coated graphite to form favorable electronic conductive pathways in the negative electrode was also investigated. The all-solid-state half-cell constructed using the argyrodite-coated graphite and carbon additive in 100:1 weight ratio exhibited a discharge capacity of 335 and 372 mAh g−1 at a C-rate of C/8 and at 25 °C and 100 °C, respectively. The electrochemical performance of the all-solid-state cell at different C-rates was evaluated at 100 °C. A relatively high discharge capacity of 276 mAh g−1 was retained at the high C-rate of 2C.

Charge-discharge curves of an all-solid-state cell using the argyrodite-coated graphite, at the C-rates of C/8, C/4, C/2, C and 2C.

Highlights

  • Argyrodite solid electrolyte coating on graphite by solution process.

  • Argyrodite-coated graphite as anode material for all-solid-state lithium batteries.

  • Graphite all-solid-state cells with high C-rate capability.

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Acknowledgements

The present study has been supported by the SOLiD-EV project by New Energy and Industrial Technology Development Organization (NEDO), Japan. The analysis of SEM was carried out with a JIB4600F at the “Joint-use Facilities: Laboratory of Nano-Micro Material Analysis”, Hokkaido University, supported by “Material Analysis and Structure Analysis Open Unit (MASAOU)”.

Funding

The present study has been supported by the SOLiD-EV project by New Energy and Industrial Technology Development Organization (NEDO), Japan.

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Correspondence to Marcela Calpa or Kiyoharu Tadanaga.

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Calpa, M., Rosero-Navarro, N.C., Miura, A. et al. Argyrodite solid electrolyte-coated graphite as anode material for all-solid-state batteries. J Sol-Gel Sci Technol 101, 8–15 (2022). https://doi.org/10.1007/s10971-021-05634-7

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  • DOI: https://doi.org/10.1007/s10971-021-05634-7

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