Evaluation of Electrochemical Effects of Metal Oxide Nanoparticles on Porous Carbon-Based Electrode in Supercapacitor

The advancement of supercapacitors as prominent and pioneering energy storage devices has garnered substantial scholarly and industrial interest. In this context, this research paper employs a facile, rapid, and highly efficient synthesis technique with significant potential for industrial scalability. The study focuses on the synthesis of two distinct composites utilizing various ratios of CuCrO₂ and ZnO with carbon black (CB) and activated carbon (AC). The characteristics of the synthesized nanoparticles (ZnO and CuCrO₂) and electrodes were assessed using structural and performance analyses. FESEM analysis of the prepared electrodes showed nearly uniform material distribution on the nickel foam. Among the synthesized composite samples, the electrodes containing CuCrO₂ exhibited better performance and stability than the other samples. The ZnO- and CuCrO₂-based electrodes delivered specific capacitances of ۶۰۰ and ۷۰۰ F·g⁻¹, respectively, at a scan rate of ۵۰ mV·s⁻¹. After ۵۰۰۰ charge–discharge cycles at ۱ A·g⁻¹, the ZnOC۳ and CuCrO₂C۳ electrodes retained ۸۷% and ۹۱% of their initial capacitance, respectively, indicating good cycling stability. Moreover, when the current density increased from ۱ to ۵ A·g⁻¹, the ZnOC۳ electrode retained ۸۳% of its specific capacitance. Under the same conditions, the CuCrO₂C۳ electrode maintained ۹۲% capacitance retention. The main novelty of this study, compared to previously reported works, lies in the use of a simple and efficient synthesis method while achieving enhanced electrochemical performance. To the best of our knowledge, no previous study has reported the synergistic incorporation of n-type ZnO and p-type delafossite CuCrO₂ within a carbon-based hybrid electrode for supercapacitor applications.

کلیدواژه ها:

Supercapacitor ، Hybrid Energy Storage ، CuCrO۲ ، Electrochemical properties