文献类型：期刊文献

中文题名：Designer uniform Li plating/stripping through lithium–cobalt alloying hierarchical scaffolds for scalable high-performance lithium-metal anodes

作者：Xinhua Liu[1];Xiaojuan Qian[3];Weiqiang Tang[2,4];Hui Luo[2];Yan Zhao[2];Rui Tan[2];Mo Qiao[2];Xinlei Gao[1];Yang Hua[1];Huizhi Wang[2];Shuangliang Zhao[4];Chao Lai[3];Magda Titirici[2];Nigel PBrandon[2];Shichun Yang[1];Billy Wub[1]

机构：[1]School of Transportation Science and Engineering,Beihang University,Beijing 100191,China;[2]Imperial College London,Sough Kensington Campus,SW72AZ,London,United Kingdom;[3]School of Chemistry and Materials Science,Jiangsu Normal University,Xuzhou 221116,Jiangsu,China;[4]State Key Laboratory of Chemical Engineering and School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2021

卷号：30

期号：1

起止页码：385

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：kindly supported by the National Natural Science Foundation of China (No. U1864213);the EPSRC Joint UK-India Clean Energy center (JUICE) (EP/P003605/1);the EPSRC Multi-Scale Modelling project (EP/S003053/1);the Innovate UK for Advanced Battery Lifetime Extension (ABLE) project;the EPSRC for funding under EP/S000933/1。

语种：英文

中文关键词：Li metal anode;Mixed conductor interface;3D porous host;Dendrite free;Metal-carbon nanofibers

摘要：Lithium metal anodes are of great interest for advanced high-energy density batteries such as lithiumair, lithium-sulfur and solid-state batteries, due to their low electrode potential and ultra-high theoretical capacity. There are, however, several challenges limiting their practical applications, which include low coulombic efficiency, the uncontrollable growth of dendrites and poor rate capability. Here, a rational design of 3D structured lithium metal anodes comprising of in-situ growth of cobalt-decorated nitrogen-doped carbon nanotubes on continuous carbon nanofibers is demonstrated via electrospinning.The porous and free-standing scaffold can enhance the tolerance to stresses resulting from the intrinsic volume change during Li plating/stripping, delivering a significant boost in both charge/discharge rates and stable cycling performance. A binary Co-Li alloying phase was generated at the initial discharge process, creating more active sites for the Li nucleation and uniform deposition. Characterization and density functional theory calculations show that the conductive and uniformly distributed cobalt-decorated carbon nanotubes with hierarchical structure can effectively reduce the local current density and more easily absorb Li atoms, leading to more uniform Li nucleation during plating. The current work presents an advance on scalable and cost-effective strategies for novel electrode materials with 3D hierarchical microstructures and mechanical flexibility for lithium metal anodes.