Compounding preparation of novel solid electrolyte with high lithium ion conductivity

(1-ω%)LPOS·ω%(t-LGPS)(ω=3, 5, 7, 10) are prepared by mixing the glass precursor of sulfide solid electrolyte 75Li₂S·24P₂S₅·1P₂O₅ (LPOS) and Li₁₀GeP₂S₁₂ (LGPS) precursor in different proportions and sintering the mixture at 270 ℃ for 4.5 hours. The prepared 95%LPOS·5%(t-LGPS) presents the highest conductivity of 1.0×10^-3 S·cm^-1 at room temperature. The prepared novel solid electrolyte was characterized systematically by XRD, EIS and SEM, et al., furthermore, the probable mechanism of the conductivity enhanced has been discussed. The all-solid-state cell with a structure of LiCoO₂/95%LPOS·5%(t-LGPS)/Li shows a discharge capacity of 115.7 mA·h·g^-1 at 0.1 C and high capacity retention 80.38% after 20 cycles at 25 ℃, which are better than these of the cell use the LPOS as electrolyte.