Chemically Binding Scaffolded Anodes with 3D Graphene Architectures Realizing Fast and Stable Lithium Storage

查看全文 作　　者：Ping [1,2]Wu;Zhiwei [1]Fang;Anping [2]Zhang;Xiao [1]Zhang;Yawen [2]Tang;Yiming [2]Zhou;Guihua [1]Yu

机构地区：[1]Materials Science and Engineering Program and Department of Mechanical Engineering,Te University of Texas at Austin,Austin,Texas 78712,USA;[2]Jiangsu Key Laboratory of New Power Batteries,Jiangsu Collaborative Innovation Center of Biomedical Functional Materials,School of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210023,China

出　　处：《Research》索引2019年第1期,共9页

基　　金：Guihua Yu acknowledges the funding support from the Welch Foundation Award(F-1861),Sloan Research Fellowship,and Camille Dreyfus Teacher-Scholar Award.Ping Wu appreciates the fnancial support from National Natural Science Foundation of China(No.51401110);Natural Science Foundation of Jiangsu Higher Education Institutions of China(16KJB150023). 摘　　要：Tree-dimensional(3D)graphene has emerged as an ideal platform to hybridize with electrochemically active materials for improved performances.However,for lithium storage,current anodic guests ofen exist in the form of nanoparticles,physically attached to graphene hosts,and therefore tend to detach from graphene matrices and aggregate into large congeries,causing considerable capacity fading upon repeated cycling.Herein,we develop a facile double-network hydrogel-enabled methodology for chemically binding anodic scafolds with 3D graphene architectures.Taking tin-based alloy anodes as an example,the doublenetwork hydrogel,containing interpenetrated cyano-bridged coordination polymer hydrogel and graphene oxide hydrogel,is directly converted to a physical-intertwined and chemical-bonded Sn−Ni alloy scafold and graphene architecture(Sn−Ni/G)dual framework.Te unique dual framework structure,with remarkable structural stability and charge-transport capability,enables the Sn−Ni/G anode to exhibit long-term cyclic life(701 mA h g^(−1) afer 200 cycles at 0.1 A g^(−1))and high rate performance(497 and 390 mA h g^(−1) at 1 and 2 A g^(−1),respectively).Tis work provides a new perspective towards chemically binding scafolded low-cost electrode and electrocatalyst materials with 3D graphene architectures for boosting energy storage and conversion. 关键词：anodic ATTACHED BOOSTING

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Chemically Binding Scaffolded Anodes with 3D Graphene Architectures Realizing Fast and Stable Lithium Storage

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