Double‐Shelled C@MoS<sub>2</sub> Structures Preloaded with Sulfur: An Additive Reservoir for Stable Lithium Metal Anodes
Huadong Yuan, Jianwei Nai, Yongjin Fang, Gongxun Lu, Xinyong Tao, Xiong Wen Lou
Abstract
Abstract The growth of Li dendrites hinders the practical application of lithium metal anodes (LMAs). In this work, a hollow nanostructure, based on hierarchical MoS 2 coated hollow carbon particles preloaded with sulfur (C@MoS 2 /S), was designed to modify the LMA. The C@MoS 2 hollow nanostructures serve as a good scaffold for repeated Li plating/stripping. More importantly, the encapsulated sulfur could gradually release lithium polysulfides during the Li plating/stripping, acting as an effective additive to promote the formation of a mosaic solid electrolyte interphase layer embedded with crystalline hybrid lithium‐based components. These two factors together effectively suppress the growth of Li dendrites. The as‐modified LMA shows a high Coulombic efficiency of 98 % over 500 cycles at the current density of 1 mA cm −2 . When matched with a LiFePO 4 cathode, the assembled full cell displays a highly improved cycle life of 300 cycles, implying the feasibility of the proposed LMA.