Phenylacetonitrile (C6H5CH2CN) Ionic Liquid Blends as Alternative Electrolytes for Safe and High-Performance Supercapacitors.

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Flavien IvolFouad Ghamouss

Abstract

The increasing need in the development of storage devices is calling for the formulation of alternative electrolytes, electrochemically stable and safe over a wide range of conditions. To achieve this goal, electrolyte chemistry must be explored to propose alternative solvents and salts to the current acetonitrile (ACN) and tetraethylammonium tetrafluoroborate (Et4NBF4) benchmarks, respectively. Herein, phenylacetonitrile (Ph-ACN) has been proposed as a novel alternative solvent to ACN in supercapacitors. To establish the main advantages and drawbacks of such a substitution, Ph-ACN + Et4NBF4 blends were formulated and characterized prior to being compared with the benchmark electrolyte and another alternative electrolyte based on adiponitrile (ADN). While promising results were obtained, the low Et4NBF4 solubility in Ph-ACN seems to be the main limiting factor. To solve such an issue, an ionic liquid (IL), namely 1-ethyl-3-methylimidazolium bis [(trifluoromethyl)sulfonyl] imide (EmimTFSI), was proposed to replace Et4NBF4. Unsurprisingly, the Ph-ACN + EmimTFSI blend was found to be fully miscible over the whole range of composition giving thus the flexibility to optimize the electrolyte formulation over a large range of IL conce...Continue Reading

References

Sep 15, 1988·Physical Review A: General Physics·A D Becke
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Oct 29, 2008·Nature Materials·Patrice Simon, Yury Gogotsi
Mar 6, 2012·ChemSusChem·Arunabha Ghosh, Young Hee Lee
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May 21, 2020·Frontiers in Chemistry·Shanshan PanHaitao Zhang

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Citations

Jan 14, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Kaelan Rorabeck, Igor Zhitomirsky
Jun 3, 2021·Materials·Apurba Ray, Bilge Saruhan

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