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

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

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Two-dimensional(2D)mesoporous pseudocapacitive polymer/graphene heterostructures combine the ad-vanced 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(12nm)and ad-justable thickness(7.5-14.1nm)for planar high-energy pseudocapacitive MSCs.Attributed to medium thickness,exposed mesopore of 12nm and large SSA of 108 m2/g,the mPDG with 10.8nm 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 elec-trolyte present wide voltage window of 1.6 V,superior volumetric energy density of 11.5 mWh/cm3,out-standing flexibility and self-integration ability.Therefore,this work offers a new platform of controllably synthesizing 2D mesoporous heterostructures for high-performance MSCs.

2D materialsMesoporesHeterostructuresPolydopamineHigh energy densityMicro-supercapacitors

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

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College of Science,Henan Agricultural University,Zhengzhou 450002,China

State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China

University of Chinese Academy of Sciences,Beijing 100049,China

Mechanical and Electrical Engineering Institute,Zhengzhou University of Light Industry,Zhengzhou 450002,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaTop-Notch Talent Program of Henan Agricultural Universitythe"Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy DICPDalian National Laboratory for Clean Energy(DNL)CAS,DNL Cooperation Fund,CASCAS,DNL Cooperation Fund,CASInternational Postdoctoral Exchange Fellowship Program(Talent-Introduction Program)China Postdoctoral Science FoundationJoint Fund of the Yulin University and the Dalian National Laboratory for Clean EnergyJoint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy

22109040221259032227913730500947XDA21000000DICP I202032DNL202016DNL202019YJ202103112021M703145YLU-DNL Fund 2021002YLU-DNL Fund 2021009

2024

10.1016/j.cclet.2023.108845

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(7)