Aqueous-solution synthesis of Na3SbS4 solid electrolytes for all-solid-state Na-ion batteries

Tae Won Kim, Kern Ho Park, Young Eun Choi, Ju Yeon Lee, Yoon Seok Jung

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Room-temperature-operable all-solid-state Na-ion batteries (ASNBs) using sulfide Na-ion solid electrolytes (SEs) are promising because of their potential for greater safety, lower cost, and acceptable performance. Despite extensive developments in the area of sulfide Na-ion SEs, their poor chemical stability and prospects for wet-chemical synthesis have been overlooked to date. Herein, the scalable synthesis of Na3SbS4via aqueous-solution routes using precursors of Na2S, Sb2S3, and elemental sulfur for ASNBs is described. With no concerns about the evolution of toxic H2S gas, the aqueous-solution-synthesized Na3SbS4 exhibits high ionic conductivities (0.1-0.2 mS cm-1 at 25 °C). Importantly, the homogeneity of the aqueous solutions enables the creation of uniform Na3SbS4 coatings on FeS2. Fe2S/Na-Sn ASNBs, employing the aqueous-solution-synthesized Na3SbS4 and the Na3SbS4-coated FeS2 for the SE layer and positive electrode, respectively, demonstrate a high charge capacity of 256 or 346 mA h g-1 with good reversibility at 30 °C, highlighting their potential for practical applications.

Original languageEnglish
Pages (from-to)840-844
Number of pages5
JournalJournal of Materials Chemistry A
Volume6
Issue number3
DOIs
Publication statusPublished - 2018

Bibliographical note

Funding Information:
This research was supported by the Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) funded by the Ministry of Science & ICT (No. 2017M1A2A2044501), and by the Materials and Components Technology Development Program of MOTIE/KEIT (10077709).

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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