Electrochemical Behavior of Nanoporous Supercapacitors with Oligomeric Ionic Liquids
Journal Article
·
· Journal of Physical Chemistry. C
- East China Univ. of Science and Technology, Shanghai (China)
- Univ. of California, Riverside, CA (United States)
According to a recent study [Matsumoto, M. ; J. Am. Chem. Soc. 2017, 139, 16072-16075], an oligomeric ionic liquid (OIL) may exhibit a wide electrochemical window and an exceptionally high capacitance in electric double layer (EDL) transistors. However, little is known on applicability of OILs in EDL capacitors with porous electrodes. To understand the capacitive performance of OILs, here we investigate the charging behavior, EDL structure, and capacitance for different types of OILs using the classical density functional theory. In contrast to their application to field-effect transistors, the capacitive performance of OILs in nanoporous electrodes is sensitive to the charging potential. We report that although adoption of oligomeric cations shows little advantage for the electrical charging of a positive electrode, they enhance the energy storage density for negative electrodes.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); UT-Battelle LLC/ORNL, Oak Ridge, TN (Unted States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1566350
- Alternate ID(s):
- OSTI ID: 1761784
- Journal Information:
- Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 26 Vol. 122; ISSN 1932-7447
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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