Hibrit süperkapasitörler için metal-organik kompozit temelli malzemeler

Hybrid supercapacitors, consisting of battery-like and capacitive electrodes, are considered promising energy storage devices due to their favorable power and density. The style and manufacture of battery-like and capacitive electrodes with high specific capacitances, high performance, and desired toughness are crucial to improving the overall energy storage performance of hybrid supercapacitors. Metal-organic frameworks (MOF) with functional properties, tunable chemical structures can result in preferable energy storage efficiencies of hybrid supercapacitors. Different types of MOF calcinations have been studied in supercapacitor applications In this work, a cobalt-based 2D coordination polymer was prepared under standard solvothermal conditions using Co(NO3)2.6H2O as metal precursor, 1,4-benzenedicarboxylate(BDC) and 1-vinylimidazole (1-VIM) as organic ligants and N,N-dimethylformamide (DMF) and ethanol as solvents. 2D coordination polymer [Co3(BDC)3(1-vim)2] was obtained and chracterized by thermogravimetry/differential thermal analysis (TA), powder X-ray diffraction (PXRD) and Fourier transforms infrared spectroscopy (FTIR). TA results confirmed that [Co3(BDC)3(1-vim)2] decomposes in three main stages and the finally Co3O4 formation was observed. Vibration of vinily, carboxyl and C—H were observed in FTIR results. Powder X-ray data was used to characterise crystal structures formed. Cobalt-based active materials, Co3O4 was obtained by thermal treatments at diffrenet temperratures and chracterized by powder X-ray diffraction. Polyvinylidene fluoride was used as the binder material and and conductive carbon was used to improve the conductivity in making of electrodes for supercapacitors. Electrochemical performance of [Co3(BDC)3(1-vim)2] and Co3O4 were studied by the cyclic voltammetry in a three- electrode system in KOH and Na2SO4 electrolyte. The results are compatible with the literature values.