Covalent organic frameworks (COFs) with redox-active moieties are potential capacitive energy storage materials. However, their performance is limited by their poor electrical conductivity and sluggish ion diffusion in their nanopores. Herein, we report coaxial one-dimensional van der Waals heterostructures (vdWHs) comprised of a carbon nanotube (CNT) core and a pyrene–pyridine COF shell synthesized by an in situ wrapping method. The coaxial structure allows efficient electronic interaction between the CNT core and COF shell and improves the electrical conductivity significantly. It also improves electrolyte ion accesses to redox-active pyridine groups in the COF, resulting in excellent capacitive energy storage performance with a high specific capacitance of ∼360 F g−1, an excellent rate capability of ∼80%, and a good stability of 92% capacitance retention after 20 000 charge/discharge cycles. Our strategy opens the door to create other multi-dimensional vdWHs for various potential applications.
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22 November 2021
Research Article|
November 23 2021
One-dimensional covalent organic framework—Carbon nanotube heterostructures for efficient capacitive energy storage
Special Collection:
One-Dimensional van der Waals Materials
Fei Liu;
Fei Liu
1
State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences
, Guangdong 510070, China
2
School of Chemical and Biomolecular Engineering, The University of Sydney
, Darlington, New South Wales 2006, Australia
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Chaojun Wang;
Chaojun Wang
2
School of Chemical and Biomolecular Engineering, The University of Sydney
, Darlington, New South Wales 2006, Australia
3
Beijing Institute of Aerial Materials, No. 8, Hangcai Avenue, Haidian District
, Beijing 100095, China
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Chang Liu;
Chang Liu
2
School of Chemical and Biomolecular Engineering, The University of Sydney
, Darlington, New South Wales 2006, Australia
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Zixun Yu;
Zixun Yu
2
School of Chemical and Biomolecular Engineering, The University of Sydney
, Darlington, New South Wales 2006, Australia
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Meiying Xu;
Meiying Xu
a)
1
State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences
, Guangdong 510070, China
a)Authors to whom correspondence should be addressed: xumy@gdim.cn; yuan.chen@sydney.edu.au; and l.wei@sydney.edu.au
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Yuan Chen
;
Yuan Chen
a)
2
School of Chemical and Biomolecular Engineering, The University of Sydney
, Darlington, New South Wales 2006, Australia
a)Authors to whom correspondence should be addressed: xumy@gdim.cn; yuan.chen@sydney.edu.au; and l.wei@sydney.edu.au
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Li Wei
Li Wei
a)
2
School of Chemical and Biomolecular Engineering, The University of Sydney
, Darlington, New South Wales 2006, Australia
a)Authors to whom correspondence should be addressed: xumy@gdim.cn; yuan.chen@sydney.edu.au; and l.wei@sydney.edu.au
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a)Authors to whom correspondence should be addressed: xumy@gdim.cn; yuan.chen@sydney.edu.au; and l.wei@sydney.edu.au
Note: This paper is part of the APL Special Collection on One-Dimensional van der Waals Materials.
Appl. Phys. Lett. 119, 211905 (2021)
Article history
Received:
September 30 2021
Accepted:
November 12 2021
Citation
Fei Liu, Chaojun Wang, Chang Liu, Zixun Yu, Meiying Xu, Yuan Chen, Li Wei; One-dimensional covalent organic framework—Carbon nanotube heterostructures for efficient capacitive energy storage. Appl. Phys. Lett. 22 November 2021; 119 (21): 211905. https://doi.org/10.1063/5.0073426
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