Document Type : Research Paper

Authors

1 Department of Electronics, UCE Rajasthan Technical University, Kota-324010, India

2 Department of Mathematics, Anand International College of Engineering, Jaipur, 303012, Rajasthan, India

3 Ayandegan Institute of Higher Education, Tonekabon, Iran

Abstract

This paper illustrates the process for creating innovative nano-heterostructures (NHs) and compares how well they perform electrochemically when used as supercapacitor electrodes. The created supercapacitor electrodes for Co-Mn core/shell and Co-Mn/ Co3O4-MnO2 core/shell nano-heterostructures offer the requisite macroporosity to facilitate electrolyte flow, hence lowering device resistance, and nanoporosity with large surface area to enable quicker reaction kinetics. Co-Mn core/shell and Co-Mn/ Co3O4-MnO2 core/shell supercapacitor electrodes both displayed specific capacitance values (731 and 2013 F g-1, respectively, at a constant current density of 2.5 A g-1), high energy (36.5 and 44.7 Wh kg-1, respectively), power density (7.5 and 5.6 kW kg-1, respectively), good capacitance retention, and long cyclicality in a three electrode configuration. Based on the efficient nano-architectural design of the electrode and the coexistence of highly redox active materials at the surface supported by highly conducting metal channels at the core for faster charge transport, the remarkable electrochemical property of the large surface area nano-heterostructures is demonstrated.

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