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Double‐Shelled C@MoS 2 Structures Preloaded with Sulfur: An Additive Reservoir for Stable Lithium Metal Anodes
Author(s) -
Yuan Huadong,
Nai Jianwei,
Fang Yongjin,
Lu Gongxun,
Tao Xinyong,
Lou Xiong Wen (David)
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202001989
Subject(s) - faraday efficiency , anode , electrolyte , materials science , cathode , lithium (medication) , chemical engineering , stripping (fiber) , electrochemistry , plating (geology) , sulfur , nanostructure , metal , carbon fibers , current density , nanotechnology , chemistry , metallurgy , composite material , electrode , composite number , medicine , physics , engineering , quantum mechanics , endocrinology , geophysics , geology
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.