Charge storage behavior of sugar derived carbon/MnO2 composite electrode material for high-performance supercapacitors

Vangapally, Naresh and V., Kiran Kumar and Martha, Surendra Kumar and et al, . (2022) Charge storage behavior of sugar derived carbon/MnO2 composite electrode material for high-performance supercapacitors. Journal of Alloys and Compounds, 893. ISSN 0925-8388

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Herein, we present an efficient and simple method to develop a 3D-Carbon /MnO2 (C/MnO2) composite active material for high-performance supercapacitors. MnO2 nanorods are synthesized by the hydrothermal process, and corresponding carbon composite is synthesized from table sugar precursors using the combustion process. MnO2 has rod-like morphologies and forms 3D electrode architectures with carbon, and contains about 5–10 nm of carbon coating. The charge storage behavior studied by galvanostatic charge-discharge cycling shows capacitance of 416 F g−1 at 1 A g−1 with capacitance retention of 90% after 5000 cycles. The superior electrochemical performance is attributed to the one–dimensional ion transport of Mn ion, the in-situ 3D electrode architecture, and carbon coating that enhances the conductivity and the surface area of MnO2. C/MnO2 composite exhibits an energy density of 60 Wh kg−1 with a power density of 201 W kg−1. The combined pseudocapacitive behavior of MnO2 and electric double-layer capacitors property of carbon exhibits significant electrochemical performance in the aqueous electrolyte. The synthesis approach uses environment benign active materials with the low cost of electrode fabrication provides an alternative route for the development of high-performance supercapacitors. © 2021 Elsevier B.V.

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IITH Creators:
IITH CreatorsORCiD
Martha, Surendra Kumar
Item Type: Article
Additional Information: Surendra K. Martha acknowledges the DST-IISc Energy Storage Platform on Supercapacitors and Power Dense Devices through the MECSP-2K17 program under grant no. DST/TMD/MECSP/2K17/20 , Government of India for financial support to this work. V. Kiran Kumar acknowledges the University grant commission.
Uncontrolled Keywords: 3D electrode; Cycle life; Electrochemical supercapacitor; MnO2 nanorods; Pseudocapacitance; Sugar derived carbon
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 13 Jul 2022 12:18
Last Modified: 13 Jul 2022 12:18
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