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

Autor: Chao Lin, Linhai Sun, Xutong Meng, Xin Yuan, Cheng‐Xing Cui, Huijie Qiao, Pengjing Chen, Siwen Cui, Lipeng Zhai, Liwei Mi
Rok vydání: 2022
Předmět:
Zdroj: Angewandte Chemie (International ed. in English). 61(42)
ISSN: 1521-3773
Popis: 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.
Databáze: OpenAIRE
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