Bromine-Functionalized Covalent Organic Frameworks for Efficient Triboelectric Nanogenerator

L. Zhai, Siwen Cui, B. Tong, Z. Wu, C. Soutis, G. Zhu, Donglin Jiang, Liwei Mi

Research output: Contribution to journalArticlepeer-review


Covalent organic frameworks (COFs) enable precise integration of various organic building blocks into porous skeletons through topology predesign. Here, we report the first example of COFs by integrating electron withdrawing bromine group onto the skeletons for triboelectric nanogenerators (TENG). The resulting framework exhibits high surface area and good crystallinity. Thus, the bromine functionalized COF has more regular aligned π columns and arrays over the skeleton than bare COFs, which in turn significantly enhances charge transport ability. As a result, bromine functionalized COFs showed higher electrical output performance at 5 Hz with a peak value of short circuit current density of 43.6 μA and output voltage of 416 V, which is 2 and 1.3 times higher than those of bare COFs (21.6 μA and 318 V), respectively. These results demonstrated that this strategy for engineering electron withdrawing groups on the skeleton could open a new aspect of COFs for developing TENG devices.
Original languageEnglish
Pages (from-to)5784-5788
Number of pages5
JournalChemistry - A European Journal
Issue number26
Early online date19 Feb 2020
Publication statusPublished - 7 May 2020


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