Melt-Infusion-Induced Electrolyte Surface Coating Stabilized Sulfide-Based All-Solid-State Lithium Metal Batteries.

作者：Shuxian Zhang, Qingyu Li, Jing Gao, Renbo Liu, Xiaobo Jiang, Shijian Xiong, Chengxiang Wang, Zhiwei Zhang, Yinghua Qiu, Yuanchang Shi, Longwei Yin, Rutao Wang · 发表于：ACS Nano · 年份：2025 · DOI：10.1021/acsnano.4c15706 · 被引用次数：23 · 研究领域：Medicine

Sulfide-based all-solid-state lithium metal batteries (ASSLBs) are a potentially safe and high-energy electrochemical storage technology. The continuous interfacial degradation within sulfide solid-state electrolytes (SSEs) and Li metal however hinders Li+ transport and induces inhomogeneous Li deposition. Herein, we propose a melt-infusion method to introduce lithium trifluorosulfonylimide (LiTFSI) on Li5.5PS4.5Cl1.5 (LPSCl) particles as an artificial coating. This artificial coating can mitigate interfacial side reactions and induce the generation of the LiF/Li3N-rich solid electrolyte interphase (SEI). The combined experimental and theoretical results reveal that this LiF/Li3N-rich SEI has the merits of accelerating Li+ transport and suppressing Li dendrites. It enables the Li anode to reach a high critical current density (CCD) up to 3.1 mA cm-2. In conjunction with coated sulfide SSEs, Li-symmetric cells operate stably for 900 h at 2 mA cm-2. The ASSLBs using this coated sulfide SSEs can reversibly charge/discharge at 2C over 1000 cycles with a 90.2% capacity retention. A high LiCoO2 loading of 28.5 mg cm-2 is further demonstrated in this ASSLB with cycling stability over 100 cycles at 0.2C.