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

Orange peel-derived activated carbon as an electrode material for supercapacitor application using nickel mesh

B. V. Raghu Vamshi Krishna, T. Nageswara Rao, and H. C. Ananda Murthy

Department of Mechanical Engineering, GITAM School of Technology, Bangalore, India

E-mail: rbelagan@gitam.edu

Received: 16 February 2023  Accepted: 13 April 2023

Abstract:

In the current work, orange peels were employed to prepare the activated carbon by the carbonization method at low temperature (AC-OP) using the nickel mesh for the first time. Through the use of several depiction techniques, the essential characteristics of the novel AC-OP electrode have been examined. The electrochemical behaviour of the AC-OP's electrode has been assessed. By using the scanning electron microscope, the prepared AC-OP powder was found to exhibit honeycomb shape. The energy gap (E_g) is discovered to be 2.06 eV. The electrochemical components of AC-OP powder, which is the primary active ingredient, deposited on nickel mesh act as a current collector. Electrochemical impedance spectroscopic and cyclic voltammetric methods are used to analyse nickel mesh electrodes. The hydrogen diffusion co-efficient of AC-OP electrode is found to be 9.30 × 10^–5 cm² s⁻¹. The developed AC-OP electrode's exceptional capacitive potential was confirmed from the galvanostatic charge–discharge tests, favourable for the fabrication of supercapacitors. These cutting-edge effects might also be quantified for the utility of power storage employing reasonably cost carbon resources in many applications for energy storage.

Keywords: Orange peel; Activated carbon; Nickel mesh electrode; Capacitance; Energy storage

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-023-02833-0

Chemical Papers 77 (9) 4953–4962 (2023)