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

doi:10.1063/1.5011105

Configuring PS_x 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 journal › Article › peer-review

5 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 Li_7+xP₃S₁₁. Structural analysis clarified that the structural changes caused by the ratio of ortho-thiophosphate tetrahedra PS₄^3- and pyro-thiophosphate ditetrahedra P₂S₇^4- affect the Li-ion conductivity. The ratio of PS₄^3- and P₂S₇^4- varies depending on x and the highest Li-ion conductivity (2.5 × 10^-3 S cm^-1) at x = 0.25. All-solid-state LiNi_0.8Co_0.15Al_0.05O₂/Li_7.25P₃S₁₁/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 language	English
Article number	047902
Journal	APL Materials
Volume	6
Issue number	4
DOIs	https://doi.org/10.1063/1.5011105
Publication status	Published - 2018 Apr 1

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)

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title = "Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte",

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.",

author = "Jung, {Wo Dum} and Yun, {Bin Na} and Jung, {Hun Gi} and Sungjun Choi and Son, {Ji Won} and Lee, {Jong Ho} and Lee, {Jong Heun} and Hyoungchul Kim",

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)",

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doi = "10.1063/1.5011105",

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T1 - Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte

AU - Jung, Wo Dum

AU - Yun, Bin Na

AU - Jung, Hun Gi

AU - Choi, Sungjun

AU - Son, Ji Won

AU - Lee, Jong Ho

AU - Lee, Jong Heun

AU - Kim, Hyoungchul

N1 - 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)

PY - 2018/4/1

Y1 - 2018/4/1

N2 - 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.

AB - 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.

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Configuring PS_x tetrahedral clusters in Li-excess Li₇P₃S₁₁ solid electrolyte

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