Bipolar electrochemical deposition of HKUST‐1 on carbon and its loading with polypyrrole for supercapacitor electrodes

Using bipolar electrochemistry, carbon paper (CP) is asymmetrically coated with copper metal. Subsequent anodic electrodissolution in a solution containing trimesic acid linkers results HKUST-1 depositing on the surface. The CP-MOF (metal organic framework) composite then soaked pyrrole/isopropanol for several hours before undergoing oxygen/Cu-induced polymerization to fill pores. Variations concentration and soaking time were investigated. X-ray diffraction shows successful synthesis of after pyrrole treatment. Scanning electron microscopy optical suggest that polymer formed within rather than as coating. Further characterization by Fourier transform infrared, photoelectron spectroscopy, gas adsorption, thermogravimetric analysis/differential thermal analysis also carried out. Capacitance was found increase used load HKUST-1. Higher concentrations lead more leaching copper. Differential pulse voltammetry (DPV), galvanostatic charge discharge, electrochemical impedance spectroscopy electrochemically studied redox peaks, capacitance retention, resistivity electrodes.