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New Covalent Organic Square Lattice Based on Porphyrin and Tetraphenyl Ethylene Building Blocks toward High-Performance Supercapacitive Energy Storage by Bidhan Chandra Patra; Santanu Bhattacharya is a Materials Science article available to read on EtoBox.

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Covalent organic frameworks (COFs) are of increasing interest in the field of materials science. Polymerizations of the topologically fitted monomers into two-dimensional (2D) structures with a periodic order often make them crystalline. The existence of this structural periodicity and regular pores makes them effective for facile ion transport and storage applications. We report herein a new porphyrin-based 2D COF using Schiff base condensation reaction between 5,10,15,20-tetrakis(para-amino phenyl) porphyrin (TAPP) and 1,1,2,2-tetrakis(4-formyl-(1,1′biphenyl))-ethane (TFBE) under solvothermal conditions. The asprepared porphyrin-tetraphenyl ethylene COF (PT-COF) possesses high crystallinity along with a large surface area of 1998 m 2 g -1 . The PT-COF electrode was used as a supercapacitive energy storage system with the combination of an electrochemical double-layer capacitor and pseudocapacitor. This COF showed a maximum specific capacitance of 1443 F g -1 at a current density of 1 A g -1 in 0.5 M H 2 SO 4 with 91% capacity retention after 3000 cycles. The presence of the porphyrin unit inside the framework causes good redox activity in the acidic media. During the cathodic sca

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Author

Bidhan Chandra Patra; Santanu Bhattacharya

Publisher

American Chemical Society (ACS)

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)