Synergistic effect of lithiophilic Zn nanoparticles and N-doping for stable Li metal anodes

作     者：Lei You Shunlong Ju Jianwen Liu Guanglin Xia Zaiping Guo Xuebin Yu Lei You;Shunlong Ju;Jianwen Liu;Guanglin Xia;Zaiping Guo;Xuebin Yu

作者机构：Department of Materials ScienceFudan UniversityShanghai 200433China Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry-of-Education Key Laboratory for Synthesis and Applications of Organic Functional MoleculesCollege of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062HubeiChina School of Chemical Engineering&Advanced MaterialsThe University of AdelaideAdelaideSA 5005Australia 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第2期

页      面：439-447页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：partially supported by the National Science Fund for Distinguished Young Scholars(51625102) the National Natural Science Foundation of China(51971065,51901045) the National Natural Science Foundation of China(NSFCàU1903217) the National Natural Science Foundation of China(No.21978073) the Innovation Program of Shanghai Municipal Education Commission(2019-01-07-00-07-E00028) the Programs for Professor of Special Appointment(Eastern Scholar)at Shanghai Institutions of Higher Learning 

主　　题：Li metal anodes Zn nanoparticles N-doping Synergistic effect 

摘      要：Li metal is the most ideal anode material for next-generation high energy lithium-ion *** uncontrollable growth of Li dendrites,however,hinders its practical ***,we propose the adoption of Zn nanoparticles uniformly embedded in N-doped carbon polyhedra homogeneously built on carbon cloth(Zn@NC@CC)to prevent the formation of Li *** on theoretical calculation and experimental observation,lithiophilic Zn nanoparticles and N-doping inside of the assynthesized Zn@NC play a synergistic role in enhancing the adsorption capacity with Li,thus resulting in uniform Li deposition and complete suppression of Li ***,the porous N-doped carbon polyhedras uniformly distributed on carbon cloth effectively relieves the volume change of Li upon repeated Li stripping/plating process,which contributes to preserving the structural integrity of the whole electrode and hence enhancing its long-term cycling *** from these synergistic effects,the Li-Zn@NC@CC electrode delivers a prolonged lifespan of over 1200 h at 1 mA cm^(-2) with an areal capacity of 1 mA h cm^(-2) in symmetric cells and high Coulombic efficiencies of 95.4%under an ultrahigh capacity of 12 mA h cm^(-2).Remarkably,Li-Zn@NC@CC//LiFePO_(4) full cells deliver a high reversible capacity of 110.2 mA h g^(-1) at 1 C over 200 cycles.