Fabrication of Co3O4 from Cobalt/2,6-Napthalenedicarboxylic Acid Metal-Organic Framework as Electrode for Supercapacitor Application

Materials

ShujahadeenB. Aziz¹  M.A. Brza¹  MohdFakhrul Zamani Abdul Kadir²  IbnuSyafiq Imaduddin³  SitiRohana Majid³  SitiNor Farhana Yusuf³  SalahR. Saed⁴  Iver Brevik⁵ 

[1] Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Kurdistan Regional Government, Sulaimani 46001, Iraq;Centre for Foundation Studies in Science, University of Malaya, Kuala Lumpur 50603, Malaysia;Centre for Ionics University Malaya, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;Charmo Research Center, Charmo University, Peshawa Street, Chamchamal, Kurdistan Region, Sulaimani 46001, Iraq;Department of Energy and Process Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway;

关键词: metal-organic frameworks (MOFs);    TGA analysis;    XRD and FESEM study;    FTIR study;    CV and GCD examination;    electrochemical properties;   

DOI  :  10.3390/ma14030573

来源: DOAJ

【 摘 要 】

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 °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.

【 授权许可】

Unknown