Fabrication of co3o4 from cobalt/2,6-napthalenedicarboxylic acid metal-organic framework as electrode for supercapacitor application

Imaduddin, Ibnu Syafiq and Majid, Siti Rohana and Aziz, Shujahadeen B. and Brevik, Iver and Yusuf, Siti Nor Farhana and Brza, M. A. and Saeed, Salah R. and Kadir, Mohd Fakhrul Zamani Abdul (2021) Fabrication of co3o4 from cobalt/2,6-napthalenedicarboxylic acid metal-organic framework as electrode for supercapacitor application. Materials, 14 (3). ISSN 1996-1944, DOI https://doi.org/10.3390/ma14030573.

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In this study, cobalt-based metal-organic framework (MOF) powder was prepared via the solvothermal method using 2,6-naphthalenedicarboxylic acid (NDC) as the organic linker and N,N-dimethylformamide (DMF) as the solvent. The thermal decomposition of the pristine cobalt-based MOF sample (CN-R) was identified using a thermogravimetric examination (TGA). The morphology and structure of the MOFs were modified during the pyrolysis process at three different temperatures: 300, 400, and 500 degrees C, which labeled as CN-300, CN-400, and CN-500, respectively. The results were evidenced via field-emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). The crystallite size of all samples was calculated using Scherrer's equation. The smallest crystallite size of 7.77 nm was calculated for the CN-300 sample. Fourier transform infrared spectroscopy (FTIR) spectra were acquired for all the samples. The graphical study of the cyclic voltammogram (CV) gave the reduction and oxidation peaks. The charge transfer resistance and ionic conductivity were studied using electrical impedance spectroscopy (EIS). The galvanostatic charge-discharge (GCD) responses of all samples were analyzed. The relatively high specific capacitance of 229 F g(-1) at 0.5 A g(-1) was achieved in the sample CN-300, whereby 110% of capacitance was retained after 5000 cycles. These findings highlighted the durability of the electrode materials at high current densities over a long cycle.

Item Type: Article
Funders: University of Sulaimani, Norwegian University of Science and Technology, Universiti Malaya
Uncontrolled Keywords: Metal-organic frameworks (MOFs); TGA analysis; XRD and FESEM study; FTIR study; CV and GCD examination; Electrochemical properties
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms Zaharah Ramly
Date Deposited: 21 Jun 2022 08:41
Last Modified: 21 Jun 2022 08:41
URI: http://eprints.um.edu.my/id/eprint/34050

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