Interlayer hydrogen-bonded covalent organic frameworks as high-performance supercapacitors

Halder, A., Ghosh, M., Khayum M, A., Bera, S., Addicoat, M. ORCID: 0000-0002-5406-7927, Sasmal, H.S., Karak, S., Kurungot, S. and Banerjee, R., 2018. Interlayer hydrogen-bonded covalent organic frameworks as high-performance supercapacitors. Journal of the American Chemical Society. ISSN 0002-7863

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Abstract

Covalent organic frameworks (COFs) have emerged as promising electrode materials in supercapacitors (SCs). However, their insoluble powder like nature, poor capacitive performance in pristine form, integrated with inferior electrochemical stability is a primary concern for their long-term use in electrochemical-devices. Keeping this in perspective, herein, we report a redox active and hydrogen bonded COF with ultrahigh stability in conc. H2SO4 (18 M), conc. HCl (12 M) and NaOH (9 M). The as-synthesized COF fabricated as thin sheets were efficiently employed as a free-standing supercapacitor electrode material using 3 M aq. H2SO4 as an electrolyte. Moreover, the pristine COF sheet showcased outstanding areal capacitance 1600 mFcm-2 (gravimetric 169 Fg-1) and excellent cyclic stability (> 1,00,000) without compromising its capacitive performance or coulombic efficiency. Moreover, as a proof-of-concept, a solidstate supercapacitor device was also assembled and subsequently tested.

Item Type: Journal article
Publication Title: Journal of the American Chemical Society
Creators: Halder, A., Ghosh, M., Khayum M, A., Bera, S., Addicoat, M., Sasmal, H.S., Karak, S., Kurungot, S. and Banerjee, R.
Publisher: American Chemical Society
Date: 22 August 2018
ISSN: 0002-7863
Identifiers:
NumberType
10.1021/jacs.8b06460DOI
Divisions: Schools > School of Science and Technology
Depositing User: Jonathan Gallacher
Date Added: 28 Aug 2018 10:06
Last Modified: 22 Aug 2019 03:00
URI: http://irep.ntu.ac.uk/id/eprint/34376

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