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

Jieqiong Qin ¹Zhi Yang ¹Jiaxin Ma ²Liangzhu Zhang ³Feifei Xing ²Hongtao Zhang ¹Shuxia Tian ⁴Shuanghao Zheng ³Zhong-Shuai Wu³

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作者信息

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;University of Chinese Academy of Sciences,Beijing 100049,China
3. State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China
4. Mechanical and Electrical Engineering Institute,Zhengzhou University of Light Industry,Zhengzhou 450002,China
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Abstract

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.

Key words

2D materials/Mesopores/Heterostructures/Polydopamine/High energy density/Micro-supercapacitors

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基金项目

National Natural Science Foundation of China(22109040)

National Natural Science Foundation of China(22125903)

National Natural Science Foundation of China(22279137)

Top-Notch Talent Program of Henan Agricultural University(30500947)

the"Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy (XDA21000000)

DICP(DICP I202032)

Dalian National Laboratory for Clean Energy(DNL)()

CAS,DNL Cooperation Fund,CAS(DNL202016)

CAS,DNL Cooperation Fund,CAS(DNL202019)

International Postdoctoral Exchange Fellowship Program(Talent-Introduction Program)(YJ20210311)

China Postdoctoral Science Foundation(2021M703145)

Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(YLU-DNL Fund 2021002)

Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(YLU-DNL Fund 2021009)

出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCDCSCD

影响因子：0.771

ISSN：1001-8417

参考文献量52

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