Toluene Tolerated Li9.88GeP1.96Sb0.04S11.88Cl0.12 Solid Electrolyte toward Ultrathin Membranes for All-Solid-State Lithium Batteries

• DOI: 10.1021/acs.nanolett.2c04140
• Publication Date: 2022-12-19T22:34:02Z
• Authors: Xiaolei Zhao; Pan Xiang; Jinghua Wu; Ziqiang Liu; Lin Shen; Gaozhan Liu; Ziqi Tian; Liang Chen; Xiayin Yao
• Keywords: Chemical Stability

Sulfide solid electrolyte membranes employed in all-solid-state lithium batteries generally show high thickness and poor chemical stability, which limit the cell-level energy density cycle life. In this work, Li9.88GeP1.96Sb0.04S11.88Cl0.12 is synthesized with Sb, Cl partial substitution of P, S, possessing excellent toluene tolerance stability to lithium. The formed SbS43- group exhibits low adsorption reactivity for molecules, confirmed by first-principles functional theory calculation. Using as solvent, ultrathin adjustable thicknesses can be well prepared wet coating method, an 8 μm thick membrane ionic conductivity 1.9 mS cm-1 ultrahigh conductance 1860 ultralow areal resistance 0.68 Ω cm-2 at 25 °C. obtained LiCoO2|Li9.88GeP1.96Sb0.04S11.88Cl0.12 membrane|Li battery shows initial reversible capacity 125.6 mAh g-1 a retention 86.3% after 250 cycles 0.1 C under 60