Homogeneous bottom-growth of lithium metal anode enabled by double-gradient lithiophilic skeleton

作     者：Li Zhang Hongfei Zheng Ben Liu Qingshui Xie Qiulin Chen Liang Lin Jie Lin Baihua Qu Laisen Wang Dong-Liang Peng Li Zhang;Hongfei Zheng;Ben Liu;Qingshui Xie;Qiulin Chen;Liang Lin;Jie Lin;Baihua Qu;Laisen Wang;Dong-Liang Peng

作者机构：State Key Laboratory for Physical Chemistry of Solid SurfacesFujian Key Laboratory of Materials GenomeCollaborative Innovation Center of Chemistry for Energy MaterialsCollege of MaterialsXiamen UniversityXiamen 361005FujianChina Pen-Tung Sah Institute of Micro-Nano Science and TechnologyXiamen UniversityXiamen 361005FujianChina 

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

年 卷 期：2021年第30卷第6期

页      面：392-400,I0010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：financial support from the National Natural Science Foundation of China(Grant Nos.51701169,51871188 and 51931006) the National Key R&D Program of China(Grant No.2016YFA0202602) the Natural Science Foundation of Fujian Province of China(No.2019J06003) the "Double-First Class" Foundation of Materials and Intelligent Manufacturing Discipline of Xiamen University 

主　　题：Double-gradient skeleton Homogeneous Li growth Lithium dendrite Lithium anode Bottom growth 

摘      要：Lithium(Li) metal is considered as the most promising anode material for the next-generation high performance Li ***,the uncontrollable dendritic growth impedes its commercial ***,we design a 3 D Si@carbon nanofibers(CNFs)@ZnO-ZnO-Cu skeleton(SCZ) for guiding the homogeneous bottom-growth of Li *** top LixSi@CNFs and bottom LiyZn@CNFs layers could form conductivity and overpotential gradient to avoid the top-growth of Li ***,the top lithiophilic LixSi@CNFs layer could regulate the nucleation and deposition of Li-ions even if the lithium dendrites grow out of the skeleton under high capacity Li deposition(30 mAh cm^(-2)).As a result,the SCZ-Li||LiFePO_(4) full cell delivers a high capacity of ~104 mAh g^(-1)(~94.82% capacity retention) after 2000 cycles at 5 C, elucidating the potential application of the 3 D double-gradient Li metal composite anode.