Electrolyte-mediated dense integration of graphene-MXene films for high volumetric capacitance flexible supercapacitors

作     者：Min Zhang Jun Cao Yi Wang Jia Song Tianci Jiang Yanyu Zhang Weimeng Si Xiaowei Li Bo Meng Guangwu Wen Min Zhang;Jun Cao;Yi Wang;Jia Song;Tianci Jiang;Yanyu Zhang;Weimeng Si;Xiaowei Li;Bo Meng;Guangwu Wen

作者机构：School of Chemistry and Chemical EngineeringShandong University of TechnologyZibo255049China School of Materials Science and EngineeringShandong University of TechnologyZibo255049China School of Chemical Engineering and TechnologyTianjin UniversityTianjin300071China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin300072China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2021年第14卷第3期

页      面：699-706页

核心收录：

学科分类：081702[工学-化学工艺] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：This work was supported by the Natural Science Foundation of Shandong Province(Nos.ZR2018BB038 and ZR2019BEM041) the National Natural Science Foundation of China(Nos.21805171,51802178 and 51804189) 

主　　题：electrolyte-mediated dense structure continuous ion transport channels composite film flexible supercapacitors high energy density 

摘      要：High conductivity two-dimensional(2D)materials have been proved to be potential electrode materials for flexible supercapacitors because of its outstanding chemical and physical ***,electrodes based on 2D materials always suffer from limited electrolyte-accessible surface due to the restacking of the 2D sheets,hindering the full utilization of their surface *** this regard,an electrolyte-mediated method is used to integrate dense structure reduced graphene oxide/MXene(RGM)-electrolyte composite *** such composite films,reduced graphene oxide(RGO)and MXene sheets are controllable assembly in compact layered structure with electrolyte filled between the *** electrolyte layer between RGO and MXene sheets forms continuous ion transport channels in the composite ***,the RGM-electrolyte composite films can be used directly as self-supporting electrodes for supercapacitors without additional conductive agents and *** a result,the composite films demonstrate enhanced volumetric specific capacity,improved volumetric energy density and higher power density compared with both pure RGO electrode and porous composite electrode prepared by traditional ***,when the mass ratio of MXene is 30%,the electrode delivers a volumetric specific capacity of 454.9 F·cm^(−3) with a high energy density of 39.4 Wh·L^(−1).More importantly,supercapacitors based on the composite films exhibit good flexibility electrochemical *** investigation provides a new approach to synthesize dense structure films based on 2D materials for application in high volumetric capacitance flexible supercapacitors.