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High Ionic Conductivity with Improved Lithium Stability of CaS- and CaI₂-Doped Li₇P₃S₁₁ Solid Electrolytes Synthesized by Liquid-Phase Synthesis.

ABSTRACT: Li₇P₃S₁₁ solid electrolytes (SEs) subjected to liquid-phase synthesis with CaS or CaI₂ doping were investigated in terms of their ionic conductivity and stability toward lithium anodes. No peak shifts were observed in the XRD patterns of CaS- or CaI₂-doped Li₇P₃S₁₁, indicating that the doping element remained at the grain boundary. CaS- or CaI₂-doped Li₇P₃S₁₁ showed no internal short circuit, and the cycling continued, indicating that not only CaI₂ including I^- but also CaS could help increase the lithium stability. These results provide insights for the development of sulfide SEs for use in all-solid-state batteries in terms of their ionic conductivity and stability toward lithium anodes.

SUBMITTER: Hikima K

PROVIDER: S-EPMC9118387 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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High Ionic Conductivity with Improved Lithium Stability of CaS- and CaI2-Doped Li7P3S11 Solid Electrolytes Synthesized by Liquid-Phase Synthesis.

Hikima Kazuhiro K Kusaba Ikuyo I Gamo Hirotada H Phuc Nguyen Huu Huy NHH Muto Hiroyuki H Matsuda Atsunori A

ACS omega 20220506 19

Li7P3S11 solid electrolytes (SEs) subjected to liquid-phase synthesis with CaS or CaI2 doping were investigated in terms of their ionic conductivity and stability toward lithium anodes. No peak shifts were observed in the XRD patterns of CaS- or CaI2-doped Li7P3S11, indicating that the doping element remained at the grain boundary. CaS- or CaI2-doped Li7P3S11 showed ...[more]

PMID: 35601295

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