In-situ investigation of pressure effect on structural evolution and conductivity of Na3SbS4 superionic conductor

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hui Wang
  • Ming Yu
  • Yan Wang
  • Zhenxing Feng
  • Yingqi Wang
  • Xujie Lü
  • Jinlong Zhu
  • Chengdu Liang

Detail(s)

Original languageEnglish
Pages (from-to)111-116
Journal / PublicationJournal of Power Sources
Volume401
Publication statusPublished - 15 Oct 2018
Externally publishedYes

Abstract

Sulfide-based conductors are one class of the most promising solid electrolytes for next-generation of all-solid-state batteries due to their advantages on high ionic conductivity and favorable mechanical properties of easy densification. Besides new material chemistry to be explored, understanding the pressure effect on structure and property is equally important from both fundamental and practical considerations, as pressure is one way to tune the properties of such solid electrolytes. Here we report the pressure-driven structural evolution and conductivity change of Na3SbS4 solid electrolyte through the integration of molecular dynamics (MD) simulation and in-situ experiments. Theoretical calculation predicts that no phase transition happens to tetragonal Na3SbS4 under 10 GPa isotopically pressure. Synchrotron X-ray diffraction and Raman results confirm that Na3SbS4 keeps stable tetragonal structure but shows anisotropic compressibility along different directions. After pressure release, the ionic conductivity of Na3SbS4 increases by four folds to 1.6 mS cm−1, which is resulted from the dramatic decrease of grain boundary resistance.

Research Area(s)

  • Conductivity, Na-ion conductor, Na3SbS4, Pressure effect, Solid-state battery, Structure

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

In-situ investigation of pressure effect on structural evolution and conductivity of Na3SbS4 superionic conductor. / Wang, Hui; Yu, Ming; Wang, Yan; Feng, Zhenxing; Wang, Yingqi; Lü, Xujie; Zhu, Jinlong; Ren, Yang; Liang, Chengdu.

In: Journal of Power Sources, Vol. 401, 15.10.2018, p. 111-116.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review