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Chemrxiv_PANI@TCOFs_24.09.2020.pdf (1.46 MB)

Post-Synthetic Modification of Covalent Organic Frameworks via in Situ Polymerization of Aniline for Enhanced Capacitive Energy Storage

preprint
submitted on 24.09.2020 and posted on 25.09.2020 by Tapas Dutta, Abhijit Patra

Covalent organic frameworks (COFs) with layered architecture with open nanochannels and high specific surface areas are promising candidates for energy storage. However, the low electrical conductivity of two-dimensional COFs often limits their scope in energy storage applications. The conductivity of COFs can be enhanced through post-synthetic modification with conducting polymers. Herein, we developed polyaniline (PANI) modified triazine-based COFs via in situ polymerization of aniline with the porous frameworks. The composite materials showed high conductivity of 1.4-1.9 x 10-2 S cm-1 at room temperature with 10-fold enhancement in specific capacitance than the pristine frameworks. The fabricated supercapacitor exhibited a high energy density of 24.4 W h kg-1 and a power density of 200 W kg-1 at 0.5 A g-1 current density. Moreover, the device fabricated using the conducting polymer-triazine COF composite can light up a green light-emitting diode for 1 min after being charged for 10 s.

Funding

DST-SERB (EMR/2017/000233)

History

Email Address of Submitting Author

abhijit@iiserb.ac.in

Institution

Indian Institute of Science Education and Research Bhopal

Country

India

ORCID For Submitting Author

0000-0003-3144-1813

Declaration of Conflict of Interest

No conflict of interest

Version Notes

Chemrxiv_PANI@TCOFs_24.09.2020

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