Synthesis and Characterization of Ternary Mesoporous Carbon/ZnMn2O4 for Supercapacitor Application

Sim, Cheng Kim and Razali, S.A. and Majid, Siti Rohana and Mahmood, Noor Zalina (2020) Synthesis and Characterization of Ternary Mesoporous Carbon/ZnMn2O4 for Supercapacitor Application. Journal of Electronic Materials, 49 (2). pp. 1024-1035. ISSN 0361-5235, DOI

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Mesoporous carbon/ZnMn2O4 (C/ZMO) was synthesized via a simple and economical combustion method. C/ZMO-1 exhibited high porosity with a specific surface area of 794.94 m2 g−1. Energy-dispersive x-ray spectroscopy results and x-ray diffraction patterns have proved that ZMO was successfully doped to the carbon source. Electrochemical properties of the materials were investigated with cyclic voltammetry and galvanostatic charge–discharge in 6 M KOH electrolyte using a three-electrode system. The electrochemical measurements demonstrated that the capacitance of C/ZMO-1 improved after ZMO was introduced, from 117.06 Fg−1 to 122.94 Fg−1 at a current density of 0.3 Ag−1. Additionally, high durability was observed in C/ZMO-1 with 90.77% of capacitance retention after 5000 cycles at various current densities. A symmetrical C/ZMO-1||C/ZMO-1 cell was fabricated with high durability and stability of 98.78%. An energy density of 1.94 Wh kg−1 and power density of 129.43 W kg−1 of the symmetrical cell has been achieved. A long cycle life with excellent durability results implied that mesoporous carbon composite is a promising, cost-effective and environmentally friendly electrode material for supercapacitors. © 2019, The Minerals, Metals & Materials Society.

Item Type: Article
Funders: Universiti Malaya: GPF037B-2018
Uncontrolled Keywords: energy storage material; mesoporous carbon composite; supercapacitor; ZnMn2O4
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Q Science > QH Natural history
Divisions: Faculty of Science > Department of Physics
Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 23 Jun 2020 04:49
Last Modified: 23 Jun 2020 04:49

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