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Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

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Division of Electronics and Electrical Engineering, Dongguk University-Seoul, Seoul 04620, Korea
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Centre of Excellence for Energy Research, Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology (Deemed to be University), Chennai 600119, India
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Graphene Research Institute, Sejong University, Seoul 05006, Korea
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Institute of Nano and Advanced Materials Engineering, Sejong University, Seoul 05006, Korea
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Integrated Organic Electronics Lab, School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
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Electrochemical Energy Laboratory, Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, India
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Research Unit of Advanced Materials for Energy Storage, Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand
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Author to whom correspondence should be addressed.
Polymers 2020, 12(4), 918; https://doi.org/10.3390/polym12040918
Received: 14 March 2020 / Revised: 11 April 2020 / Accepted: 11 April 2020 / Published: 15 April 2020
Since the ability of ionic liquid (IL) was demonstrated to act as a solvent or an electrolyte, IL-based electrolytes have been widely used as a potential candidate for renewable energy storage devices, like lithium ion batteries (LIBs) and supercapacitors (SCs). In this review, we aimed to present the state-of-the-art of IL-based electrolytes electrochemical, cycling, and physicochemical properties, which are crucial for LIBs and SCs. ILs can also be regarded as designer solvents to replace the more flammable organic carbonates and improve the green credentials and performance of energy storage devices, especially LIBs and SCs. This review affords an outline of the progress of ILs in energy-related applications and provides essential ideas on the emerging challenges and openings that may motivate the scientific communities to move towards IL-based energy devices. Finally, the challenges in design of the new type of ILs structures for energy and environmental applications are also highlighted. View Full-Text
Keywords: ionogel; polymer electrolytes; energy storage; electric double-layer capacitors; interfacial property ionogel; polymer electrolytes; energy storage; electric double-layer capacitors; interfacial property
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MDPI and ACS Style

Karuppasamy, K.; Theerthagiri, J.; Vikraman, D.; Yim, C.-J.; Hussain, S.; Sharma, R.; Maiyalagan, T.; Qin, J.; Kim, H.-S. Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications. Polymers 2020, 12, 918.

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