离子键合
固态
导电体
锂(药物)
材料科学
硫黄
纳米技术
化学工程
离子电导率
化学
离子
电极
物理化学
工程类
有机化学
电解质
复合材料
医学
冶金
内分泌学
作者
Cheng Ding,Yan Lü,Lihua Pu,Chengshuai Bao,Congqing Zhu,Jun Jin,Zhaoyin Wen
标识
DOI:10.1016/j.est.2024.112011
摘要
Lithium‑sulfur batteries, known for their high theoretical energy density, cost-effectiveness, and environmental friendliness, stand out as one of the most promising technologies in advanced secondary batteries. Nevertheless, they are facing challenges like polysulfide shuttling and the growth of lithium dendrites. In this study, we present the utilization of a bifunctional initiator, InF3, incorporated into DOL-based electrolytes for in-situ polymerization to mitigate polysulfide shuttling. Simultaneously, it promotes the development of a solid electrolyte interface (SEI) enriched with LiF and LiIn alloy on the lithium metal surface. The assembled Li|Li symmetric cells exhibit a high critical current density of 3.0 mA cm−2, together with durable cycling performance over 4000 h at a current density of 0.5 mA cm−2. Most importantly, benefiting from the effective blocking effect of PDOL-based polymer electrolytes and the robustness of the formed e−/Li+ dual conductive SEI layer, the solid-state lithium‑sulfur batteries demonstrate excellent electrochemical performance, with a high retention capacity of 774.3 mA h g−1 after 200 cycles at a 0.2 C rate, showcasing significant potential for practical applications in high-energy-density solid-state batteries.
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