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https://hdl.handle.net/2440/127207
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Type: | Journal article |
Title: | True meaning of pseudocapacitors and their performance metrics: asymmetric versus hybrid supercapacitors |
Author: | Chodankar, N.R. Pham, H.D. Nanjundan, A.K. Fernando, J.F.S. Jayaramulu, K. Golberg, D. Han, Y.-K. Dubal, D.P. |
Citation: | Small, 2020; 16(37):2002806-1-2002806-35 |
Publisher: | Wiley-VCH GmbH |
Issue Date: | 2020 |
ISSN: | 1613-6810 1613-6829 |
Statement of Responsibility: | Nilesh R. Chodankar, Hong Duc Pham, Ashok Kumar Nanjundan, Joseph F. S. Fernando, Kolleboyina Jayaramulu ... Deepak P. Dubal ... et al. |
Abstract: | The development of pseudocapacitive materials for energy-oriented applications has stimulated considerable interest in recent years due to their high energy-storing capacity with high power outputs. Nevertheless, the utilization of nanosized active materials in batteries leads to fast redox kinetics due to the improved surface area and short diffusion pathways, which shifts their electrochemical signatures from battery-like to the pseudocapacitive-like behavior. As a result, it becomes challenging to distinguish "pseudocapacitive" and "battery" materials. Such misconceptions have further impacted on the final device configurations. This Review is an earnest effort to clarify the confusion between the battery and pseudocapacitive materials by providing their true meanings and correct performance metrics. A method to distinguish battery-type and pseudocapacitive materials using the electrochemical signatures and quantitative kinetics analysis is outlined. Taking solid-state supercapacitors (SSCs, only polymer gel electrolytes) as an example, the distinction between asymmetric and hybrid supercapacitors is discussed. The state-of-the-art progress in the engineering of active materials is summarized, which will guide for the development of real-pseudocapacitive energy storage systems. |
Keywords: | asymmetric supercapacitors battery materials hybrid supercapacitors pseudocapacitive materials |
Description: | First published: 06 August 2020 |
Rights: | © 2020 Wiley‐VCH GmbH |
DOI: | 10.1002/smll.202002806 |
Grant ID: | http://purl.org/au-research/grants/arc/FT180100058 ARC |
Published version: | http://dx.doi.org/10.1002/smll.202002806 |
Appears in Collections: | ARC Research Hub for Graphene Enabled Industry Transformation publications Aurora harvest 4 Chemical Engineering publications |
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