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

Autor: S. A. Razali, Siti Rohana Majid, Noor Zalina Mahmood, Cheng-Kim Sim
Rok vydání: 2019
Předmět:
Zdroj: Journal of Electronic Materials. 49:1024-1035
ISSN: 1543-186X
0361-5235
DOI: 10.1007/s11664-019-07733-2
Popis: 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.
Databáze: OpenAIRE
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