Aimed at tackling the shuttle effect in lithium‐sulfur (Li−S) batteries, a Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) ceramic is adopted to block the migration of polysulfides. However, the LAGP‐based Li−S battery with liquid electrolyte wetting the interfaces still suffers from rapid capacity decay, as polysulfides tend to dissolve into liquid electrolyte and get firmly adsorbed by LAGP. In this work, a dual confinement effect for polysulfides is put forward, enabled by the LAGP ceramic and solvent‐in‐salt (SIS), wherein the SIS can greatly suppress the dissolution of polysulfides. Owing to the synergistic effect of SIS and LAGP, the semi‐solid‐state Li−S batteries show superior capacity retention and long cycling life. In particular, at a current density of 0.2 C, the Li−S battery with SIS‐modified LAGP ceramic electrolyte delivers a high initial reversible capacity of 1251.7 mAh g⁻¹ and long cycle life of over 250 cycles with a decay rate of only 0.07 % per cycle.

中文翻译：

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Li1.5Al0.5Ge1.5（PO4）3陶瓷基锂硫电池，具有高循环稳定性，通过对多硫化物的双重约束作用实现

Li _1.5 Al _0.5 Ge _1.5（PO ₄）₃旨在解决锂硫（Li-S）电池中的穿梭效应（LAGP）陶瓷用于阻止多硫化物的迁移。然而，基于LAGP的具有液体电解质润湿界面的Li-S电池仍会遭受容量快速衰减的影响，因为多硫化物倾向于溶解于液体电解质中并被LAGP牢固吸收。在这项工作中，通过LAGP陶瓷和盐溶溶剂（SIS）实现了对多硫化物的双重限制作用，其中SIS可以极大地抑制多硫化物的溶解。由于SIS和LAGP的协同作用，半固态Li-S电池具有出色的容量保持能力和较长的循环寿命。特别是，在电流密度为0.2 C时，具有SIS改性LAGP陶瓷电解质的Li-S电池可提供1251.7 mAh g ^-1的高初始可逆容量 超过250个循环的长循环寿命，每个循环的衰减率仅为0.07％。