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A Self-supported Graphene/Carbon Nanotube Hollow Fiber for Integrated Energy Conversion and Storage

查看全文 作　　者：Kai [1]Liu;Zilin [1]Chen;Tian [1]Lv;Yao [1]Yao;Ning [1]Li;Huili [1]Li;Tao [1]Chen 高影响力作者 机构地区：[1]Shanghai Key Lab of Chemical Assessment and Sustainability,School of Chemical Science and Engineering,and Institute of Advanced Study,Tongji University,Shanghai 200092,People’s Republic of China高影响力机构 出　　处：《Nano-Micro Letters》索引2020年第12卷第5期,共11页高影响力期刊 基　　金：the National Natural Science Foundation of China(Nos.21774094,51702237,and 51973159);Science and Technology Commission of Shanghai Municipality(14DZ2261100);Shanghai Rising–Star Program(17QA1404300);the Youth Talent Support Program at Shanghai,the Fundamental Research Funds for the Central Universities(Tongji University). 摘　　要：Wearable fiber-shaped integrated energy conversion and storage devices have attracted increasing attention,but it remains a big challenge to achieve a common fiber electrode for both energy conversion and storage with high performance.Here,we grow aligned carbon nanotubes(CNTs)array on continuous graphene(G)tube,and their seamlessly connected structure provides the obtained G/CNTs composite fiber with a unique self-supported hollow structure.Taking advantage of the hollow structure,other active materials(e.g.,polyaniline,PANI)could be easily functionalized on both inner and outer surfaces of the tube,and the obtained G/CNTs/PANI composite hollow fibers achieve a high mass loading(90%)of PANI.The G/CNTs/PANI composite hollow fibers can not only be used for high-performance fiber-shaped supercapacitor with large specific capacitance of 472 mF cm^-2,but also can replace platinum wire to build fiber-shaped dye-sensitized solar cell(DSSC)with a high power conversion efficiency of 4.20%.As desired,the integrated device of DSSC and supercapacitor with the G/CNTs/PANI composite hollow fiber used as the common electrode exhibits a total power conversion and storage efficiency as high as 2.1%.Furthermore,the self-supported G/CNTs hollow fiber could be further functionalized with other active materials for building other flexible and wearable electronics. 关 键 词：Carbon NANOTUBE GRAPHENE INTEGRATED ENERGY conversion ENERGY STORAGE
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