A Novel Time-Saving Synthesis Approach for Li-Argyrodite Superionic Conductor

Suk Ho Hwang, Seung Deok Seo, Dong Wan Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The wet-chemical synthetic approach for Li-argyrodite superionic conductors for all-solid-state batteries (ASSBs) is promising as it saves time, energy, and cost, while achieving scalable production. However, it faces certain commercialization issues such as byproduct generation, nucleophilic attack of the solvent, and long processing times. In this study, a facile and time-saving microwave-assisted wet synthesis (MW-process) approach is proposed for Li6PS5Cl (LPSC), which is completed in 3 h at the precursor-synthesis stage. The LPSC crystal obtained from the MW-process presents various advantages such as fast-PS43− generation, high solubility of LiCl, and low adverse effects from solvent molecules. These features help in achieving a high Li-ion conductivity (2.79 mS cm−1) and low electric conductivity (1.85×10−6 mS cm−1). Furthermore, the LPSC crystal is stable when reacting with Li metal (2000 h at 0.1 mA cm−2) and exhibits superior cyclability with LiNi0.6Co0.2Mn0.2 (NCM622) (145.5 mA h g−1 at 0.5 C, 200 cycles with 0.12% of capacity loss per cycle). The proposed synthetic approach presents new insights into wet-chemical engineering for sulfide-based solid-electrolytes (SEs), which is crucial for developing ASSBs from a commercial-scale perspective.

Original languageEnglish
Article number2301707
JournalAdvanced Science
Volume10
Issue number22
DOIs
Publication statusPublished - 2023 Aug 4

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.

Keywords

  • Li-argyrodite
  • all-solid-state batteries
  • microwave-assisted synthesis
  • sulfide solid electrolytes
  • superionic conductors

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • General Chemical Engineering
  • General Materials Science
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • General Engineering
  • General Physics and Astronomy

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