3D Free-Standing Carbon Nanofibers Modified by Lithiophilic Metals Enabling Dendrite-Free Anodes for Li Metal Batteries  

作　　者：Huifeng Zhuang Tengfei Zhang Hong Xiao Xiao Liang Fanchao Zhang Jianlin Deng Qiuming Gao 

机构地区：[1]Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education,Beijing Advanced Innovation Center for Biomedical Engineering,School of Chemistry,Beihang University,Beijing 100191,China [2]National Supercomputer Research Center of Advanced Materials,Advanced Materials Institute,Qilu University of Technology,Shandong Academy of Sciences,Jinan 250014,China

出　　处：《Energy & Environmental Materials》2023年第3期373-384,共12页能源与环境材料（英文）

基　　金：supported by the Chinese National Natural Science Foundation(No.22075008,21571010,U0734002);National Basic Research Programs of China(973 Program,No.2014CB931800,2011CB935700);Chinese Aeronautic Project(No.2013ZF51069);111 Project(No.B14009).

摘　　要：Li metal with high-energy density is considered as the most promising anode for the next-generation rechargeable Li metal batteries;however,the growth of Li dendrites seriously hinders its practical application.Herein,3D free-standing carbon nanofibers modified by lithiophilic metal particles(CNF/Me,Me=Sn,Fe,Co)are obtained in situ by the electrospinning method.Benefiting from the lithophilicity,the CNF/Me composite may effectively prevent the formation of Li dendrites in the Li metal batteries.The optimized CNF/Sn–Li composite electrode exhibits a stable cycle life of over 2350 h during Li plating/stripping.When matched with typical commercial LiFePO_(4)(LFP)cathode,the LFP//CNF/Sn–Li full cell presents a high initial discharge specific capacity of 139 mAh g^(−1)at 1 C,which remains at 146 mAh g^(−1)after 400 cycles.When another state-of-the-art commercial LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM(811))cathode is used,the assembled NCM//CNF/Sn–Li full cell shows a large initial specific discharge capacity of 206 mAh g^(−1)at substantially enhanced 10 C,which keeps at the good capacity of 99 mAh g^(−1)after 300 cycles.These results are greatly superior to the counterparts with Li as the anodes,indicating the great potential for practical utilization of the advanced CNF/Sn–Li electrode.

关 键 词：3D free-standing carbon nanofibers dendrite-free anodes electrospinning method lithiophilic metal lithium metal batteries 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]