Rational design of one-pot solvent-assisted synthesis for multi-functional Sn-substituted superionic Li argyrodite solid electrolytes

Sun Hee Choi, Woong Ju Kim, Byeong Hyeon Lee, Sung Chul Kim, Jin Gu Kang, Dong Wan Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Sulfide-based Li superionic conductors are being considered good solid electrolytes for all-solid-state batteries. Despite some benefits of conventional solid-state methods, the end goal of the synthesis of sulfide electrolytes is the development of new liquid-phase methods. Herein, we demonstrate the rational design of a one-pot solvent-assisted route for the simple, facile, and low-cost synthesis of the Sn-substituted Li argyrodite superionic conductors. Our method enables the successful incorporation of Sn into the host lattices, yielding highly crystalline materials with high ionic conductivity (∼2 mS cm−1), good air stability (20% humidity), and excellent Li metal compatibility (1500 h stability). Benefitting from these, at 0.1C, the full cell based on Li6.125P0.875Sn0.125S5Br exhibits an initial discharge capacity of 151 mA h g−1 and ∼66% capacity retention after 50 cycles (99 mA h g−1). This work presents an unprecedented solvent-engineered approach for the fabrication of versatile Li argyrodites substituted with aliovalent cations.

Original languageEnglish
Pages (from-to)14690-14704
Number of pages15
JournalJournal of Materials Chemistry A
Volume11
Issue number27
DOIs
Publication statusPublished - 2023 May 22

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2022R1A2C3003319, 2018M3D1A1058744), and by the Institutional Program (2E32541) of the Korea Institute of Science and Technology (KIST).

Publisher Copyright:
© 2023 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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