ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Construction of enriched CuO/Cu₂O electrode materials with discrete heteroatom-doped graphene oxide and investigation of capacitance performance for symmetrical supercapacitor application

Sibel Yazar

Department of Chemistry, Engineering Faculty, Istanbul University-Cerrahpasa, Avcilar, Istanbul, Turkey

E-mail: sibelyazar@iuc.edu.tr

Received: 17 February 2023  Accepted: 4 May 2023

Abstract:

Supercapacitors are important energy storage systems that need to be investigated for next-generation clean energy continuity, but their capacitance, energy densities, and discharge times need to be improved with a suitable electrode material. Herein, the galvanostatic electrodeposition method for supercapacitors has successfully synthesized copper-based electrodes containing separately S-, N-, and Cl-doped GO. The electrodes offer the perfect surface for enhancing the specific surface area and providing electrically active fields for the Faraday reaction. The Cl-GO@CuO/Cu₂O electrode shows a maximum capacity of 577 F g⁻¹ at 5 mV s⁻¹. In addition, the Cl-GO@CuO/Cu₂O symmetric supercapacitor achieved a maximum energy density of 25.3 Wh kg⁻¹ and maximum power density of 700.0 W kg⁻¹. With capacitance retention of 97.07%, the device exhibits stability for up to 2000 cycles.

Keywords: Copper oxide; Supercapacitor; Graphene oxide; Energy density; Energy storage

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02860-x

Chemical Papers 77 (9) 5259–5273 (2023)