Journal
JOURNAL OF ENERGY STORAGE
Volume 52, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2022.104740
Keywords
Electrolyte; Energy and power density; Supercapacitor; Salt effect; Redox mediators; Capacitance
Categories
Funding
- University Grants Commision (UGC), New Delhi, India [201610158088]
- Deenbandhu Chhotu Ram University of Science and Technology, Murthal [DCRUST/Sch./2019/508, DCRUST/Sch./2021/218-223]
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This paper explores the importance of electrolytes in the performance of supercapacitors and the characteristics of different electrolytes in energy storage. The paper classifies current electrolytes into different categories and discusses the important parameters to consider when selecting an electrolyte for supercapacitors. It also discusses the role of redox mediators in enhancing the electrochemical behavior of supercapacitors.
The role of an electrolyte is quite indispensable towards the supercapacitors' performance including the essential parameters like power density, energy density, specific capacitance, cyclic stability, rate performance and can make a noticeable difference altogether. In this paper, an overview about the performance characteristics of various electrolytes towards energy storage is explored. Additionally, the classification of the several present-day electrolytes into different categories such as aqueous, organic, ionic liquid, solid and quasi-state electrolyte, hydrogel polymer electrolyte, organo-gel electrolyte, water in salt electrolyte and green electrolytes is rationally illustrated. The article encompasses the important parameters to be considered while selecting an electrolyte for supercapacitors such as thermal stability, electrochemical stability, energy and power densities, equivalent series resistance, capacitance, salt as well as solvent effect and many more. Even, it confers about redox mediators playing a key role in enhancing the electrochemical behavior of supercapacitors. We assure that the paper can lead about the key aspects for selection, proposed observance about good capacitance data and reaction mechanism occurring at electrified interface and with future aspects, it can invite a bulk readability.
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