Propionitrile as a single organic solvent for high voltage electric double-layer capacitors
- Authors
- Nguyen, Hoai Van T.; Bin Faheem, Abdullah; Kwak, Kyungwon; Lee, Kyung-Koo
- Issue Date
- 1-7월-2020
- Publisher
- ELSEVIER
- Keywords
- Propionitrile; 1,1-Dimethylpyrrolidinium tetrafluoroborate; Electric double-layer capacitor; High-voltage; Cycle stability
- Citation
- JOURNAL OF POWER SOURCES, v.463
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 463
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/54458
- DOI
- 10.1016/j.jpowsour.2020.228134
- ISSN
- 0378-7753
- Abstract
- This study investigates the novel use of propionitrile (PN) as the single organic solvent for high-voltage carbon/carbon capacitors. Quaternary ammonium salts spiro-(1,1')-bipyrrolidinium tetrafluoroborate (SBPBF4) and 1,1-dimethylpyrrolidinium tetrafluoroborate (DMPBF4) dissolved in acetonitrile (AN) and propionitrile (PN) are compared. PN-based electrolytes exhibit a large and symmetric electrochemical stability, an exceptional anodic potential limit, good ionic conductivity, and low viscosity, allowing EDLCs to operate at 3.5 V even with a high current density (2.5 A g(-1)). Moreover, PN-based electrolytes can suppress the anodic dissolution of the Al current collector at a high potential. These advantages help in the realization of EDLCs with excellent cycling stabilities at high voltages. As a result, at 3.5 V, EDLCs with PN-based electrolytes exhibit the highest energy and power density of 49.3 Wh kg(-1) and 22.9 kW kg(-1), respectively. Therefore, the electrolyte systems reported here could be a promising electrolyte candidate to replace currently commercialized electrolytes for practical applications.
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Collections - College of Science > Department of Chemistry > 1. Journal Articles
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