Abstract
Ionic liquids (ILs), often known as green designer solvents, have demonstrated immense application potential in numerous scientific and technological domains. ILs possess high boiling point and low volatility that make them suitable environmentally benign candidates for many potential applications. The more important aspect associated with ILs is that their physicochemical properties can be effectively changed for desired applications just by tuning the structure of the cationic and/or anionic part of ILs. Furthermore, these eco-friendly designer materials can function as electrolytes or solvents depending on the application. Owing to the distinctive properties such as low volatility, high thermal and electrochemical stability, and better ionic conductivity, ILs are nowadays immensely used in a variety of energy applications, particularly in the development of green and sustainable energy storage and conversion devices. Suitable ILs are designed for specific purposes to be used as electrolytes and/or solvents for fuel cells, lithium-ion batteries, supercapacitors (SCs), and solar cells. Herein, we have highlighted the utilization of ILs as unique green designer materials in Li-batteries, fuel cells, SCs, and solar cells. This review will enlighten the promising prospects of these unique, environmentally sustainable materials for next-generation green energy conversion and storage devices. Ionic liquids have much to offer in the field of energy sciences regarding fixing some of the world’s most serious issues. However, most of the discoveries discussed in this review article are still at the laboratory research scale for further development. This review article will inspire researchers and readers about how ILs can be effectively applied in energy sectors for various applications as mentioned above.
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The original contributions presented in the study are included in the article. Further inquiries can be directed to the corresponding author.
Abbreviations
- HDDA:
-
1,6-Hexanediol diacrylate
- AMII:
-
1–Allyl–3–methylimidazolium iodide
- BMIM Cl:
-
1-Butyl-3-methylimidazolium chloride
- BMII:
-
1-Butyl-3-methylimidazolium iodide
- BMIMBF4 :
-
1-Butyl-3-methylimidazolium tetrafluoroborate
- EMITFSI:
-
1-Ethyl-3-methylimidazolium bis(trifuoromethylsulfonyl)imide
- EMIm:
-
1-Ethyl-3-methylimidazolium
- EMIM:
-
1-Ethyl-3-methylimidazolium
- EMIM Ac:
-
1-Ethyl-3-methylimidazolium acetate
- [EMIm][Tf2N]:
-
1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
- EMIm TFSI:
-
1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
- EMImDCN:
-
1-Ethyl-3-methylimidazolium dicyanamide
- EMIBF4 :
-
1-Ethyl-3-methylimidazolium tetrafluoroborate
- HMII:
-
1-Hexyl-3-methylimidazolium iodide
- [HMIM]I:
-
1-Methyl-3-hexylimidazolium iodide
- PMII:
-
1-Methyl-3-propyl imidazolium iodide
- PMImI:
-
1-Methyl-3-propyl imidazolium iodide
- PMImDP:
-
1-Propyl-3-methylimidazolium dihydrogenphosphate
- [EMIm] [TFSI]:
-
1-Propyl-3-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide
- VHpII:
-
1-Vinyl-3-heptylimidazolium iodide
- BCP:
-
Bathocuproine
- FSI:
-
Bis(fluorosulfonyl) imide
- B.P.:
-
Boiling point
- DSSCs:
-
Dye-sensitized solar cells
- EES:
-
Electrical energy storage
- EDLC:
-
Electrochemical double-layer capacitance
- ESPWs:
-
Electrochemical stability potential windows
- ETL:
-
Electron transport layer
- ETM:
-
Electron transport materials
- FF:
-
Fill factor
- FA:
-
Formamidinium
- GO:
-
Graphene oxide
- GuNCS:
-
Guanidinium thiocyanate
- IoT:
-
Internet of Things
- ILs:
-
Ionic liquids
- M.P.:
-
Melting point
- MAF:
-
Methylammonium formate
- MAPbI3 :
-
Methylammonium lead triiodide
- MA:
-
Methylammonium
- MWNT:
-
Multiwalled carbon nanotube
- NPs:
-
Nanoparticles
- [PyrI4][NTf2]:
-
N-Butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide
- NMB:
-
N-Methylbenzimidazole
- VOC :
-
Open-circuit voltage
- P–HI:
-
P[((3–(4–vinylpyridine) propanesulfonic acid) iodide)–co–(acrylonitrile)]
- PCE:
-
Photon conversion efficiency
- PVDF-HFP:
-
Poly(vinylidene fluoride-co-hexafluoropropylene)
- PEG:
-
Polyethylene glycol
- PPDD:
-
Polypyridyl pendant poly(amidoamine) dendritic derivative
- PTh:
-
Polythiophene
- PIP:
-
Pyrrolidinium (PYR) and piperidinium
- JSC :
-
Short-circuit current
- SS-IL:
-
Solid-state ionic liquids
- SCs:
-
Supercapacitors
- TiOPc:
-
Titanium phthalocyanine
- ZrP:
-
Zirconium phosphate
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We express our sincere gratitude to the Head and Dean, Department of Chemistry, Central University of Allahabad, Prayagraj, for providing laboratory facility.
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Manoj K. Banjare, Rahul Kanaoujiya, Shruti Trivedi, and Kamalakanta Behera: conceptualization and supervision and review and editing. Gaurav Choudhary, Jyoti Dhariwal, and Moumita Saha: review and editing, original draft preparation, and visualization. All the authors contributed to the article and approved the submitted version.
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Choudhary, G., Dhariwal, J., Saha, M. et al. Ionic liquids: environmentally sustainable materials for energy conversion and storage applications. Environ Sci Pollut Res 31, 10296–10316 (2024). https://doi.org/10.1007/s11356-023-25468-w
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DOI: https://doi.org/10.1007/s11356-023-25468-w