Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte

Wo Dum Jung, Bin Na Yun, Hun Gi Jung, Sungjun Choi, Ji Won Son, Jong Ho Lee, Jong Heun Lee, Hyoungchul Kim

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We demonstrate that the Li-ion conductivity can be improved by adding a certain amount of Li (x = 0.25-0.5) as a charge carrier to the composition of glass-ceramic Li7+xP3S11. Structural analysis clarified that the structural changes caused by the ratio of ortho-thiophosphate tetrahedra PS43- and pyro-thiophosphate ditetrahedra P2S74- affect the Li-ion conductivity. The ratio of PS43- and P2S74- varies depending on x and the highest Li-ion conductivity (2.5 × 10-3 S cm-1) at x = 0.25. All-solid-state LiNi0.8Co0.15Al0.05O2/Li7.25P3S11/In-metal cell exhibits the discharge capacity of 106.2 mAh g-1. This ion conduction enhancement from excess Li is expected to contribute to the future design of sulfide-type electrolytes.

Original languageEnglish
Article number047902
JournalAPL Materials
Volume6
Issue number4
DOIs
Publication statusPublished - 2018 Apr 1

Bibliographical note

Funding Information:
This work was also supported in part by the Technology Development Program to Solve Climate Change of the National Research Foundation (NRF) funded by the Ministry of Science and ICT (Grant No. 2017M1A2A2044482)

Publisher Copyright:
© 2018 Author(s).

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering

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