Dendrite‑Free and Stable Lithium Metal Battery Achieved by a Model of Stepwise Lithium Deposition and Stripping

作     者：Tiancun Liu Jinlong Wang Yi Xu Yifan Zhang Yong Wang Tiancun Liu;Jinlong Wang;Yi Xu;Yifan Zhang;Yong Wang

作者机构：Department of Chemical EngineeringSchool of Environmental and Chemical EngineeringShanghai University99 Shangda RoadShanghai 200444People’s Republic of China Key Laboratory of Organic Compound Pollution Control Engineering(MOE)99 Shangda RoadShanghai 200444People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2021年第13卷第11期

页      面：155-167页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This work is well supported by National Natural Science Foundation of China(52073170,21975154) Shanghai Municipal Education Commission(Innovation Program(2019-01-07-00-09-E00021) Innovative Research Team of High-level Local Universities in Shanghai.The authors also acknowledge Lab for Microstructure,Instrumental Analysis&Research Center,Shanghai University,for their help on materials characterization.Moreover,the authors thank High Performance Computing Center of Shanghai University,and Shanghai Engineering Research Center of Intelligent Computing System(No.19DZ2252600)for the assistance of computing resources and technical support 

主　　题：Lithiophilic skeleton Stepwise Li deposition and stripping Dendrite suppression Lithium metal battery Electrochemical properties 

摘      要：The uncontrolled formation of lithium(Li)dendrites and the unnecessary consumption of electrolyte during the Li plating/stripping process have been major obstacles in developing safe and stable Li metal ***,we report a cucumber-like lithiophilic composite skeleton(CLCS)fabricated through a facile oxidationimmersion-reduction *** stepwise Li deposition and stripping,determined using in situ Raman spectra during the galvanostatic Li charging/discharging process,promote the formation of a dendrite-free Li metal ***,numerous pyridinic N,pyrrolic N,and CuxN sites with excellent lithiophilicity work synergistically to distribute Li ions and suppress the formation of Li *** to these advantages,cells based on CLCS exhibit a high Coulombic efficiency of 97.3%for 700 cycles and an improved lifespan of 2000 h for symmetric *** full cells assembled with LiFePO_(4)(LFP),SeS_(2) cathodes and CLCS@Li anodes demonstrate high capacities of 110.1 mAh g^(−1) after 600 cycles at 0.2 A g^(−1) in CLCS@Li|LFP and 491.8 mAh g^(−1) after 500 cycles at 1 A g^(−1) in CLCS@Li|*** unique design of CLCS may accelerate the application of Li metal anodes in commercial Li metal batteries.