Three-dimensional Ag/carbon nanotube-graphene foam for high performance dendrite free lithium/sodium metal anodes

查看全文 作　　者：Bofang [1]Tian;Zhenxin [1]Huang;Xilian [2]Xu;Xiehong [2]Cao;Hui [1,3]Wang;Tingting [1]Xu;Dezhi [1]Kong;Zhuangfei [1]Zhang;Jie [1]Xu;Jinhao [1]Zang;Xinjian [1]Li;Ye [1]Wang

机构地区：[1]Key Laboratory of Material Physics,Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,China;[2]College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China;[3]Center of Super-Diamond and Advanced Films(COSDAF)and Department of Chemistry,City University of Hong Kong,999077,Hong Kong SAR,China

出　　处：《Journal of Materials Science & Technology》索引2023年第1期,共9页

基　　金：supported by the National Natural Science Foun-dation of China(Grant No.U1804132);Zhongyuan Youth Talent Support Program of Henan Province(Grant No.ZYQR201912152);Academic Improvement Program of Physics of Zhengzhou Univer-sity(GrantNo.2018WLTJ02),Zhengzhou University Youth Talent Start-up Grant. 摘　　要：Although lithium metal and sodium metal are promised as ideal anodes for lithium ion batteries(LIBs)and sodium ion batteries(SIBs),they still suffer from inevitable dendrite growth.In light of this,silver nanoparticles(Ag NPs)are sputtered onto three-dimensional carbon nanotube decorated graphene foam(3D CNT-GF)to construct superior 3D Ag/CNT-GF composite matrix for lithium metal anodes(LMAs)and sodium metal anodes(SMAs).With this design,lithiophilic/sodiophilic Ag NPs could provide favorable sites to guide Li/Na metal nucleation and growth,thus leading to low nucleation overpotentials,high Coulombic efficiency and long cycle performance.Accordingly,3D Ag/CNT-GF electrodes can stably cy-cle for 1000 and 750 cycles at 3 mA cm^(−2)with 1 mAh cm^(−2)for SMAs and LMAs,respectively.More attractively,it can also stably sustain 300 cycles(SMAs)and 500 cycles(LMAs)at a large current den-sity of 5 mA cm^(−2)with 1 mAh cm^(−2).The excellent electrochemical performance can be attributed to the lithiophilic/sodiophilic electrode surface,3D porous electrode structure and the dendrite-free mor-phology as demonstrated by ex-situ scanning electron microscopy(SEM)and in-situ optical microscopy analyses.Furthermore,full cells based on Na@3D Ag/CNT-GF||Na 3 V 2(PO 4)3@carbon(NVP@C)and Li@3D Ag/CNT-GF||LiFePO 4(LFP)could deliver highly reversible capacities of 90.1 and 106.4 mAh g^(−1),respec-tively,at 100 mA g^(−1)after 200 cycles for SIBs and LIBs,respectively.This work demonstrates a novel 3D Ag/CNT-GF matrix for boosting Li/Na deposition stability for their future applications. 关键词：Li/Na metal anodes Lithiophilic/sodiophilic 3D Ag/CNT-GF NANOSTRUCTURE Dendrite-free morphology Uniform deposition In-situ optical microscopy investigation

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Three-dimensional Ag/carbon nanotube-graphene foam for high performance dendrite free lithium/sodium metal anodes

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