Hierarchical 2D MnO2@1D mesoporous NiTiO3 core-shell hybrid structures for high-performance supercapattery electrodes: Theoretical and experimental investigations

Kitchamsetti, N and Samtham, M and Singh, D and Choudhary, E and Rondiya, SR and Ma, Y-R and Cross, RW and Dzade, NY and Devan, RS (2023) Hierarchical 2D MnO2@1D mesoporous NiTiO3 core-shell hybrid structures for high-performance supercapattery electrodes: Theoretical and experimental investigations. In: Journal of Electroanalytical Chemistry, 936 .

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Abstract

Novel hybrid core–shell electrodes of 2D and 1D nanomaterials have the ability to effectively address the relatively lower specific energy of supercapacitors. Herein, we report the utilization of the core–shell structure of hierarchical 2D Manganese Dioxide (MnO2) nanoflakes and 1D Nickel Titanate (NiTiO3) (NTO) mesoporous rods as an efficient supercapacitor electrode providing an enormous surface area and more pathways for OH– ions diffusion. The two-step-chemically processed hybrid porous core–shell hetero-architecture of MnO2@NTO delivers a specific capacitance of 1054.7 F/g, specific power of 11879.87 W/kg, and specific energy of 36.23 Wh/kg. Furthermore, 85.3 % retention in capacitance is perceived after 5000 cycles without degradation in the surface morphological features. Complementary first principles density functional theory (DFT) calculations reveal synergistic interaction of MnO2 with NTO in the MnO2@NTO heterostructure, which improves the electrical conductivity.

Item Type:	Journal Article
Publication:	Journal of Electroanalytical Chemistry
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Capacitance; Computer architecture; Density functional theory; Electrodes; Manganese oxide; Nickel compounds; Shells (structures), Core shell; Core-shell hybrids; Density-functional-theory; Experimental investigations; Hetero-architecture; Hybrid core-shell; Hybrid structure; Mesoporous; Performance; Theoretical investigations, Supercapacitor
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Apr 2023 06:21
Last Modified:	21 Apr 2023 06:21
URI:	https://eprints.iisc.ac.in/id/eprint/81317

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