In-situ constructed polymer/alloy composite with high ionic conductivity as an artificial solid electrolyte interphase to stabilize lithium metal anode

作     者：Ai-Long Chen Yushan Qian Shujun Zheng Yuyang Chen Yue Ouyang Lulu Mo Zheng-Long Xu Yue-E Miao Tianxi Liu Ai-Long Chen;Yushan Qian;Shujun Zheng;Yuyang Chen;Yue Ouyang;Lulu Mo;Zheng-Long Xu;Yue-E Miao;Tianxi Liu

作者机构：State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityHong HumKowloonHong Kong 999077China Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第3期

页      面：3888-3894页

核心收录：

学科分类：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：support from the National Natural Science Foundation of China(Nos.22075042 and 52102310) Shanghai Rising-Star Program(No.22QA1400300) the Natural Science Foundation of Shanghai(No.20ZR1401400) the Shanghai Scientific and Technological Innovation Project(No.22520710100) the Fundamental Research Funds for the Central Universities,and the Donghua University(DHU)Distinguished Young Professor Program(No.LZB2021002) 

主　　题：polymer/alloy composite in-situ polymerization artificial solid electrolyte interphase(SEI) double-layered structure lithium metal battery. 

摘      要：Lithium(Li)metal is regarded as the best anode material for lithium metal batteries(LMBs)due to its high theoretical specific capacity and low redox ***,the notorious dendrites growth and extreme instability of the solid electrolyte interphase(SEI)layers have severely retarded the commercialization process of ***,a double-layered polymer/alloy composite artificial SEI composed of a robust poly(1,3-dioxolane)(PDOL)protective layer,Sn and LiCl nanoparticles,denoted as PDOL@Sn-LiCl,is fabricated by the combination of in-situ substitution and polymerization processes on the surface of Li metal *** lithiophilic Sn-LiCl multiphase can supply plenty of Li-ion transport channels,contributing to the homogeneous nucleation and dense accumulation of Li *** mechanically tough PDOL layer can maintain the stability and compact structure of the inorganic layer in the long-term cycling,and suppress the volume fluctuation and dendrites formation of the Li metal *** a result,the symmetrical cell under the double-layered artificial SEI protection shows excellent cycling stability of 300 h at 5.0 mA·cm^(−2)for 1 mAh·cm^(−2).Notably,the Li||LiFePO_(4)full cell also exhibits enhanced capacity retention of 150.1 mAh·g^(−1)after 600 cycles at 1.0 ***,the protected Li foil can effectively resist the air and water corrosion,signifying the safe operation of Li metal in practical *** present finding proposed a different tactic to achieve safe and dendrite-free Li metal anodes with excellent cycling stability.