A Synthesis and Characterization of ZIF 67 CTAB-Assisted for Supercapacitor Electrode Active Material
Keywords:
ZIF-67, MOF, Supercapacitor, CTABAbstract
This study investigates the influence of adding hexadecyltrimethylammonium bromide (CTAB) on the morphology and electrochemical performance of ZIF-67, compared to ZIF-67 synthesized without CTAB. The addition of CTAB results in smaller ZIF crystal sizes, which enhances the diffusion capability of electrolyte ions. CTAB-assisted ZIF-67 was characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD) to confirm the material's structure and morphology. Electrochemical performance was evaluated through cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) measurements. The findings revealed that CTAB enhances crystallinity, as observed in XRD analysis, and reduces particle size from an average of 1692 nm to 1057 nm, as measured by SEM. Electrochemical testing further demonstrated that the addition of CTAB during ZIF-67 synthesis increased the specific capacitance from 98.2 F/g to 104.8 F/g in a 3M KOH electrolyte at a current density of 1 A/g. Based on these results, CTAB-assisted ZIF-67 shows great potential as an active electrode material for supercapacitors.
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