An efficient chemical reduction-induced assembly of Fe_(3)O_(4)@graphene fiber for wire-shaped supercapacitors with ultrahigh volumetric energy density

作     者：XIAO Peng SHI MinJie XU Li TAO FengBo LI Yu ZHU HangTian LIU YuTing LI ZhiMin ZHOU YunPeng FENG Wei XIAO Peng;SHI MinJie;XU Li;TAO FengBo;LI Yu;ZHU HangTian;LIU YuTing;LI ZhiMin;ZHOU YunPeng;FENG Wei

作者机构：State Grid Jiangsu Electric Power Co.Ltd.Research InstituteNanjing 211103China School of Materials Science and EngineeringJiangsu University of Science and TechnologyZhenjiang 212003China State Key Laboratory of Advanced Transmission TechnologyGlobal Energy Interconnection Research Institute Co.Ltd.Beijing 102211China School of Materials Science and EngineeringTianjin UniversityTianjin 300354China Institute of Functional Nano&Soft Materials(FUNSOM)Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215213China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2021年第64卷第10期

页      面：2246-2254页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61904116,52002157) the Natural Science Foundation of Jiangsu Province(Grant No.BK20190976) the Science and Technology Project of State Grid Corporation of China(Grant No.5455DW190009) 

主　　题：wire-shaped supercapacitors self-assembly graphene fiber high energy density wearable electronics 

摘      要：Benefiting from high flexibility and weavability,the wire-shaped supercapacitors(SCs)arouse tremendous interests for the applications in wearable/portable *** fiber(GF)is considered as a promising linear electrode for wire-shaped ***,the bottleneck is how to develop the GF-based linear electrode with facile fabrication process while wellmaintaining satisfactory electrochemical ***,a novel Fe_(3)O_(4)@GF composite linear electrode is proposed via a chemical reduction-induced assembly approach,in which the GO and Fe_(3)O_(4) nanoparticles(NPs)realize the efficient selfassembly owing to the electrostatic and van der Waals interactions,as well as the sufficient reduction of GO during the preparation *** resultant fiber-shaped architecture shows boosted charge-transfer kinetics,high flexibility and structural *** Fe_(3)O_(4)@GF linear electrode exhibits excellent electrochemical behaviors including a large volumetric specific capacitance(~250.75 F cm^(−3)),remarkable rate capability and favorable electrochemical kinetics in aqueous electrolyte,superior than previously reported GF-based linear *** real application,a high-performance wire-shaped SC with excellent flexibility and weavability is fabricated based on such Fe_(3)O_(4)@GF linear electrode and gel electrolyte,demonstrating ultrahigh volumetric energy density(18.8 mWh cm^(−3)),power density(4000 mW cm^(−3))and strong durability(~93.5%retention after 10000 cycles).Prospectively,the fabricated wire-shaped SC can maintain reliable electrochemical behaviors in various deformation states,showing its potentials in future portable and wearable devices.