True Meaning of Pseudocapacitors and Their Performance Metrics: Asymmetric versus Hybrid Supercapacitors
Article
Chodankar, Nilesh R., Pham, Hong Duc, Nanjundan, Ashok Kumar, Fernando, Joseph F. S., Jayaramulu, Kolleboyina, Golberg, Dmitri, Han, Young-Kyu and Dubal, Deepak P.. 2020. "True Meaning of Pseudocapacitors and Their Performance Metrics: Asymmetric versus Hybrid Supercapacitors." Small. 16 (37). https://doi.org/10.1002/smll.202002806
Article Title | True Meaning of Pseudocapacitors and Their Performance Metrics: Asymmetric versus Hybrid Supercapacitors |
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ERA Journal ID | 3432 |
Article Category | Article |
Authors | Chodankar, Nilesh R., Pham, Hong Duc, Nanjundan, Ashok Kumar, Fernando, Joseph F. S., Jayaramulu, Kolleboyina, Golberg, Dmitri, Han, Young-Kyu and Dubal, Deepak P. |
Journal Title | Small |
Journal Citation | 16 (37) |
Article Number | 2002806 |
Number of Pages | 35 |
Year | 2020 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 1613-6810 |
1613-6829 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/smll.202002806 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1002/smll.202002806 |
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 |
ANZSRC Field of Research 2020 | 340604. Electrochemistry |
400404. Electrochemical energy storage and conversion | |
Public Notes | The accessible file is the accepted version of the paper. Please refer to the URL for the published version. |
Byline Affiliations | Dongguk University, Korea |
Centre for Future Materials | |
Queensland University of Technology | |
Indian Institute of Technology Jammu, India |
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