Interfacial assembly of 2D polydopamine/graphene heterostructures with well-defined mesopore and tunable thickness for high-energy planar micro-supercapacitors  

作　　者：Jieqiong Qin Zhi Yang Jiaxin Ma Liangzhu Zhang Feifei Xing Hongtao Zhang Shuxia Tian Shuanghao Zheng Zhong-Shuai Wu 

机构地区：[1]College of Science,Henan Agricultural University,Zhengzhou 450002,China [2]State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Mechanical and Electrical Engineering Institute,Zhengzhou University of Light Industry,Zhengzhou 450002,China

出　　处：《Chinese Chemical Letters》2024年第7期439-444,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22109040,22125903,22279137);Top-Notch Talent Program of Henan Agricultural University(No.30500947);the“Transformational Technologies for Clean Energy and Demonstration”Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA21000000);DICP(No.DICP I202032);Dalian National Laboratory for Clean Energy(DNL),CAS,DNL Cooperation Fund,CAS(Nos.DNL202016,DNL202019);International Postdoctoral Exchange Fellowship Program(Talent-Introduction Program)(No.YJ20210311);China Postdoctoral Science Foundation(No.2021M703145);the Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(Nos.YLU-DNL Fund 2021002,YLU-DNL Fund 2021009)。

摘　　要：Two-dimensional(2D)mesoporous pseudocapacitive polymer/graphene heterostructures combine the advanced merits of 2D materials and mesoporous materials,possessing unique nanosheet structure,large specific surface area(SSA),abundant oxygen/nitrogen-containing groups,desirable electrical conductivity and admirable electrochemical redox activity,and hold great potential for constructing high-performance planar micro-supercapacitors(MSCs).Herein,we demonstrate the interfacial assembly of 2D mesoporous polydopamine/graphene(mPDG)heterostructures with well-defined mesopore structure(12 nm)and adjustable thickness(7.5–14.1 nm)for planar high-energy pseudocapacitive MSCs.Attributed to medium thickness,exposed mesopore of 12 nm and large SSA of 108 m^(2)/g,the m PDG with 10.8 nm thickness reveals prominent mass capacitance of 419 F/g and impressive cycling stability with~96%capacitance retention after 5000 cycles.Furthermore,the symmetric mPDG-based MSCs with“water-in-salt”gel electrolyte present wide voltage window of 1.6 V,superior volumetric energy density of 11.5 mWh/cm^(3),outstanding flexibility and self-integration ability.Therefore,this work offers a new platform of controllably synthesizing 2D mesoporous heterostructures for high-performance MSCs.

关 键 词：2D materials MESOPORES HETEROSTRUCTURES POLYDOPAMINE High energy density Micro-supercapacitors 

分 类 号：TM53[电气工程—电器] TB34[一般工业技术—材料科学与工程]