Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte
- Configuring PSx tetrahedral clusters in Li-excess Li7P3S11 solid electrolyte
- 이종호; 김형철; 손지원; 정훈기; 윤빈나; 최성준; 정으뜸; 이종흔
- electrolytes; sulfur compounds; ceramics; ionic conductivity; batteries
- Issue Date
- APL materials
- VOL 6, NO 4, 047902
- 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 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 (2.5 103 S cm1) at x = 0.25. All-solidstate LiNi0.8Co0.15Al0.05O2/Li7.25P3S11/In-metal cell exhibits the discharge capacity of 106.2 mAh g1. This ion conduction enhancement from excess Li is expected to contribute to the future design of sulfide-type electrolytes.
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