Self-Regulated Phenomenon of Inorganic Artificial Solid Electrolyte Interphase for Lithium Metal Batteries

作者：Bing Han, Dongyu Feng, Shuai Li, Zhen Zhang, Yucheng Zou, Meng Gu, Hong Meng, Chaoyang Wang, Chaoyang Wang, Kang Xu, Yusheng Zhao, Hongbo Zeng, Chunsheng Wang, Chunsheng Wang, Yonghong Deng · 发表于：Nano Letters · 年份：2020 · DOI：10.1021/acs.nanolett.0c01400 · 被引用次数：110 · 研究领域：Advanced Battery Materials and Technologies、Advancements in Battery Materials、Advanced Battery Technologies Research

Solid electrolyte interphase (SEI) is crucial for suppressing Li dendrite growth in high-energy lithium metal (LiM) batteries. Unfortunately, the naturally formed SEI on the LiM anode surface in carbonate electrolytes cannot suppress Li dendrites, resulting in a continuous consumption of electrolytes and LiM during cycling. Artificial SEI normally lacks self-healing and self-regulating capability, gradually losing the effectiveness during cycling. In this work, we report the self-regulating phenomenon of LiRAP-ASEI that can effectively suppress Li dendrites and is investigated using in situ optical microscopy and COMSOL multiphysics simulation. The effectiveness of self-regulated LiRAP-ASEI is further evaluated in the most aggressive Li/sulfur cells with a lean electrolyte (10 μL mAh –1 ) and LiRAP-ASEI/LiM (2.5-fold excess of LiM). The LiRAP@Cu∥sulfur@C cells show a stable 3000 cycle life at a current density of 11.5 mA cm –2 . The self-regulated phenomenon holds great promise for the development of high-energy-density LMBs.