Covalent Organic Frameworks with Tailored Functionalities for Modulating Surface Potentials in Triboelectric Nanogenerators

Designing materials with high triboelectric is an efficient way of improving output performance of triboelectric nanogenerators (TENGs). Herein, we synthesized a series of covalent organic frameworks (COFs) with similar skeletons but various functional groups ranging between electron‐donating and el...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2022-10, Vol.61 (42), p.e202211601-n/a
Main Authors: Lin, Chao, Sun, Linhai, Meng, Xutong, Yuan, Xin, Cui, Cheng‐Xing, Qiao, Huijie, Chen, Pengjing, Cui, Siwen, Zhai, Lipeng, Mi, Liwei
Format: Article
Language:English
Subjects:
Built-in Functionalities
Computer applications
Covalent Organic Frameworks
Fluorination
Functional groups
Nanogenerators
Self-Powered Anticorrosion
Surface Potential
Triboelectric Nanogenerators
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Summary:Designing materials with high triboelectric is an efficient way of improving output performance of triboelectric nanogenerators (TENGs). Herein, we synthesized a series of covalent organic frameworks (COFs) with similar skeletons but various functional groups ranging between electron‐donating and electron‐withdrawing. These COFs form an ideal platform for clarifying the contribution of each group to TENG performance because the pore wall is perturbed in a predesigned manner. Kelvin probe force microscopy and computational data suggest that surface potentials and electron affinities of COFs can be improved by introducing electron‐donating or withdrawing groups, with the highest values observed for fluorinated COF. The TENG with fluorinated COF delivered an output voltage and current of 420 V and 64 μA, respectively, which are comparable to other reported materials. This strategy can be used to efficiently screen suitable frameworks as TENG materials with excellent output performance. Covalent organic frameworks (COFs) with similar skeletons but different functional groups ranging from electron‐donating to electron‐withdrawing on the pore channel were pre‐designed as TENGs platform and further used to protect the cathodic current of carbon steel. Besides, the corresponding output performance of the COF‐TENG to be precisely tuned through the transmit effects of surface sites to the polygonal backbones.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202211601