Microwave assisted cobalt incorporated covalent organic frameworks as cathode material for asymmetric supercapacitor device
- Authors
- Shanavaz, H.; Prasanna, B.P.; Prashanth, M.K.; Jhaa, Gaurav; Alharethy, Fahd; Raghu, M.S.; Jeon, Byong-Hun; Kumar, K. Yogesh
- Issue Date
- Jan-2024
- Publisher
- Elsevier Ltd
- Keywords
- Covalent organic frameworks; Device fabrication; Microwave synthesis; Supercapacitors
- Citation
- Journal of Alloys and Compounds, v.970, pp.1 - 12
- Indexed
- SCOPUS
- Journal Title
- Journal of Alloys and Compounds
- Volume
- 970
- Start Page
- 1
- End Page
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192904
- DOI
- 10.1016/j.jallcom.2023.172634
- ISSN
- 0925-8388
- Abstract
- Nitrogen-rich covalent organic frameworks (COF) with crystallinity and porosity are finding applications in electrochemical energy storage applications. The present work aims at developing a microwave-assisted synthetic method for the synthesis of COF using benzene-1,3-diamine and terephthalaldehyde (BDT-COF) through imine bond. BDT-COF modification was through the incorporation of cobalt (BDT@Co-COF). The morphological, structural and electrochemical properties of BDT-COF and BDT@Co-COF were examined and compared. Enhanced electrochemical performance was observed in BDT@Co-COF with a specific capacitance of 445 F/g compared to BDT-COF (196 F/g) at 2 mV/s. The density functional theory (DFT) shows a decreased bandgap in BDT@Co-COF (1.12 eV) compared to BDT-COF (1.70 eV). Asymmetric supercapacitor device (ASD) was fabricated using BDT@Co-COF and BDT-COF as positive and negative electrodes, respectively. The specific capacitance of ASD is found to be 220 F/g at 2 mV/s. A coin-type cell, model CR 2016, was also fabricated using the above-mentioned electrodes and used to power two red LEDs in parallel with a 1.45 V turn-on voltage for 10 min. The good stability and results of device fabrication tells about the well-confined structural arrangement in BDT@Co-COF.
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