Bilayer carbon-based structure with the promotion of homogenous nucleation for lithium metal anodes  

作　　者：SHAO YeQing XIE YongHui YANG Yang CAO JiaQi LI XiuWan LI WangYang ZHANG QiaoLi CHENG ShouLin CHENG ShuYing WANG XingHui 

机构地区：[1]College of Physics and Information Engineering,Institute of Micro-Nano Devices and Solar Cells,Fuzhou University,Fuzhou 350108,China [2]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China [3]Fujian Provincial Key Laboratory of Light Propagation and Transformation,College of Information Science and Engineering,Huaqiao University,Xiamen 361000,China [4]Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou 213000,China [5]Fujian Key Laboratory of Electrochemical Energy Storage Materials,Fuzhou University,Fuzhou 350002,China

出　　处：《Science China(Technological Sciences)》2022年第7期1558-1566,共9页中国科学（技术科学英文版）

基　　金：supported by the Award Program for Fujian Minjiang Scholar Professorship;the National Natural Science Foundation of China(Grant No. 11704071);the Excellent Youth Foundation of Fujian Scientific Committee (Grant No. 2019J06008);Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China (Grant No.2021ZR146);Fujian Provincial Department of Industry and Information Technology of China (Grant No. 82318075)。

摘　　要：Lithium metal anodes (LMAs) are considered as the promising alternatives for next-generation high energy density batteries,but are still hampered by the severe growth of uncontrollable lithium dendrites.The growth of lithium dendrites induces poor cycling lifespan and serious safety concerns,dragging lithium metal batteries out of practical applications.We designed a bilayer carbonbased structure covered with Co/C nanosheets and vertical graphene sheets (VGS).The enormous specific surface area and uniformly distributed Co nanoparticles of the CC@Co/C-VGS host are derived from its unique design,which can reduce local current density and nucleation overpotential,resulting in a dendrite-free morphology and exceptional cycling stability.Symmetric cells exhibit over 400 cycles (800 h) at a high current density/capacity of 10 mA cm^(-2)/10 mA h cm^(-2).Full cells using LiFePO_(4)as the cathode have an enhanced rate capability and a prolonged lifespan,reaching 90 mA h g^(-1)after 1000 cycles at 2 C with 73.5% capacity retention.This unique design sheds light on developing high-performance LMAs.

关 键 词：lithiophilic material bilayer carbon structure graphene MOF lithium metal anode 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ127.11[化学工程—无机化工]