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Quantum Capacitance of Two-Dimensional-Material-Based Supercapacitor Electrodes

Ghosh, S and Behera, SK and Mishra, A and Casari, CS and Ostrikov, KK (2023) Quantum Capacitance of Two-Dimensional-Material-Based Supercapacitor Electrodes. In: Energy and Fuels, 37 (23). pp. 17836-17862.

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Official URL: https://doi.org/10.1021/acs.energyfuels.3c02714


Electrochemical energy storage technology has emerged as one of the most viable solutions to tackle the challenge of fossil-fuel-based technology and associated global pollution. Supercapacitors are widely used for high-power applications, and there is tremendous ongoing effort to make them useful for high-energy storage applications. While electrode materials of supercapacitors play a central role in charge storage performance, insights into the contribution from different charge storage mechanisms are crucial from both fundamental and applied aspects. In this context, apart from the electric double layer and fast redox reaction at/near the surface, another pronounced contribution from the electrode is quantum capacitance (CQ). Here, the origin of CQ, how it contributes to the total capacitance, the possible strategies to improve it, and the state-of-art CQ of electrode materials, including carbon, two-dimensional materials, and their composites, are discussed. Although most of the studies on quantifying CQ are theoretical, some case studies on experimental measurements using standard electrochemical techniques are summarized. With an overview and critical analysis of theoretical studies on quantum capacitance of electrode materials, this review critically examines the supercapacitor design strategies, including choosing the right materials and electrolytes. These insights are also relevant to other types of clean energy storage technologies, including metal-ion capacitors and batteries. © 2023 The Authors. Published by American Chemical Society.

Item Type: Journal Article
Publication: Energy and Fuels
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to American Chemical Society.
Keywords: Capacitance; Electrodes; Energy storage; Fossil fuels; Fuel storage; Metal ions; Redox reactions; Surface reactions, Charge storage; Electrochemical energy storage; Electrode material; Energy storage technologies; Global pollution; Material-based; Quantum capacitance; Supercapacitor electrodes; Two-dimensional materials; Viable solutions, Supercapacitor
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 01 Mar 2024 05:49
Last Modified: 01 Mar 2024 05:49
URI: https://eprints.iisc.ac.in/id/eprint/83833

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