A novel route for electrosynthesis of CuCr2O4 nanocomposite with p-type conductive polymer as a high performance material for electrochemical supercapacitors

Abstract

In this work, supercapacitive performance of polypyrrole copper chromate nano particles (Ppy/CuCrO NPs) was studied. CuCrO NPs with the average size of 20nm were synthesized simply by hydrothermal method and the composite electrodes were then electropolymerized on the surface of glassy carbon electrode. Common surface analysis techniques such as scanning electron microscopy (SEM), transmission electron microscopy(TEM) and Fourier transform infrared (FTIR) were used to study the morphology and structure of the composite. Furthermore, for electrochemical evaluation of composite electrodes, techniques including cyclic voltammetry (CV), galvanostatic charge discharge (CD) and impedance spectroscopy (EIS) were used. Using cyclic voltammetry, the specific capacitance values of Ppy and Ppy/CuCrO NPs were calculated to be 109 and 508 F g, respectively. Results show that using CuCrO NPs in the structure of polymeric films led to increased specific capacitance of composite electrodes more than four times that of poly pyrrole. Increasing the conductivity and stability of composite electrodes through continuous cycles are the other advantages of using CuCrO NPs as active materials in a polymeric structure.

Modified carbon black, CB/MnO2 and CB/MnO2/PPy nanocomposites synthesised by microwave-assisted method for energy storage devices with high electrochemical performances

“…The combination of CB/MnO 2 with PPy is beneficial to improve the cyclic stability. Equivalent circuit model analysis EIS measurements were carried out to analyse the kinetics and other properties of as-prepared material [88,89]. The EIS as a powerful technique supplies the electrical properties of electrodes [90].…”

Hollow and Hierarchical Cobalt–Metal Organic Framework@CoCr2O4 Microplate Array as a Battery‐Type Electrode for High‐Performance Hybrid Supercapacitors

“…Notably, a larger CV curve enclosed area for Co–MOF@CoCr 2 O 4 /NF was seen, which implied a much stronger capacity storage comparing with the powder electrode (Co–MOF@CoCr 2 O 4 ) as well as Co–MOF precursor . The CV curves (Figure b) of Co–MOF@CoCr 2 O 4 /NF at various sweep rates of 5∼50 mV s −1 presented that the redox peak current was in direct proportion to the scan rate.…”

Nanocomposite of p-type conductive polymer/iron (III) trimesic (Fe-BTC) metal–organic frameworks: synthesis, characterisation and pseudocapacitance performance

“…The kinetics of the electrochemical reaction on the surface of the electrode/electrolyte was examined by EIS spectra analysis [37][38][39][40][41][42][43][44][45][46][47][48]. The EIS data of fabricated samples was employed to draw their Nyquist plots as displayed in Figure 10.…”