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

4 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

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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