Role of the electrode-edge in optically sensitive three-dimensional carbon foam-MoS2 based high-performance micro-supercapacitors

Kumar, S and Mukherjee, A and Telpande, S and Mahapatra, AD and Kumar, P and Misra, A (2023) Role of the electrode-edge in optically sensitive three-dimensional carbon foam-MoS2 based high-performance micro-supercapacitors. In: Journal of Materials Chemistry A .

PDF jou_mat_che_2023.pdf - Published Version Restricted to Registered users only Download (4MB) | Request a copy

Abstract

Developing high-performance micro-supercapacitors in a limited footprint area is important for miniaturized electronics, where enhancement in energy storage per unit area is critical. In this study, we used zig-zag edge based interdigitated electrodes for the micro-supercapacitor. The novel electrode geometry contributes to improved electrochemical capacitance, energy density, and power density compared to planar edge interdigitated electrodes. The zig-zag edges of the electrodes induce stronger electric field intensity between the interdigitated fingers contributing to enhanced charge storage capacity. A simulation study further confirmed the enhanced electric field intensity. A layered molybdenum disulfide (MoS2) nanostructure directly grown on a three-dimensional scaffold of carbon foam (CF) is used as the electrode material. The novel zig-zag interdigitated electrode geometry demonstrated an areal capacitance of 21 mF cm−2, which is 242% (or ∼350% enhancement while considering electrode interdigitated finger area only) higher than that of the planar edge electrodes using the same material. Moreover, the optically sensitive CF-MoS material resulted in an optically chargeable supercapacitor upon illumination with 600 nm radiation, where a self-powered voltage generation is observed. The study provides broad future prospects for combining electrode design and optically sensitive materials for enhanced charge storage in micro-supercapacitors. Thus, the study demonstrated a promising route to design efficient planar supercapacitor devices for miniaturized electronics and self-powered devices. © 2023 The Royal Society of Chemistry.

Item Type:	Journal Article
Publication:	Journal of Materials Chemistry A
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry.
Keywords:	Capacitance; Carbon; Carbon disulfide; Electric fields; Electrochemical electrodes; Foams; Layered semiconductors; Scaffolds; Storage (materials); Supercapacitor, Carbon foam; Electric field intensities; Electrode geometries; Inter-digitated electrodes; Interdigitated electrodes; Interdigitated fingers; Microsupercapacitors; Miniaturized electronics; Performance; Zig-zag, Molybdenum disulfide
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	15 Mar 2023 06:15
Last Modified:	15 Mar 2023 06:15
URI:	https://eprints.iisc.ac.in/id/eprint/80992

Actions (login required)

View Item