期刊
ACS APPLIED ENERGY MATERIALS
卷 4, 期 1, 页码 1-8出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c02321
关键词
all-solid-state lithium batteries; sulfide solid electrolyte; dual halide doping; glass-ceramic; metastable
资金
- Korea Electrotechnology Research Institute (KERI) Primary research program through the National Research Council of Science & Technology (NST) - Ministry of Science and ICT (MSIT, Korea) [20A01031]
- Technology Innovation Program - Ministry of Trade, Industry & Energy (MOTIE, Korea) [20009957]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20009957] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [20A01031] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, the crystal phase evolution in a halide-doped glassy matrix and the corresponding ionic conductivity variation in dual halide-doped Li7P2S8X (X = I, Br) solid electrolytes were systematically investigated. The results revealed that a metastable Li3PS4 phase similar to Li10GeP2S12 in the halide-doped glassy matrix was responsible for the outstanding performance of the solid electrolytes.
Halide-doped sulfide solid electrolytes have attracted great attention due to their high lithium-ion conductivity, Li-metal compatibility, and deformability for use in all-solid-state Li batteries. Although the effects of halide mixing in Li6PS5X and Li4PS4X (X = halogen) solid electrolytes are fully investigated, studies on the origin of the remarkable increase in the ionic conductivity by dual halide doped Li7P2S8X (X = I, Br) solid electrolytes are scarce. Here, we systematically investigate the crystal phase evolution in glassy matrix and the corresponding ionic conductivity variation, revealing that a metastable Li10GeP2S12-like Li3PS4 phase with halide-doped glassy matrix is responsible for the outstanding performance.
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