Formulation of ionic liquid electrolyte to expand the voltage window of supercapacitors
Abstract
Abstract An effective method to expand the operating potential window (OPW) of electrochemical capacitors based on formulating the ionic‐liquid (IL) electrolytes is reported. Using model electrochemical cells based on two identical onion‐like carbon (OLC) electrodes and two different IL electrolytes and their mixtures, it was shown that the asymmetric behavior of the electrolyte cation and anion toward the two electrodes limits the OPW of the cell and therefore its energy density. Also, a general solution to this problem is proposed by formulating the IL electrolyte mixtures to balance the capacitance of electrodes in a symmetric supercapacitor.
- Authors:
-
- Drexel Univ., Philadelphia, PA (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1265356
- Alternate Identifier(s):
- OSTI ID: 1786063
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition); Journal Volume: 54; Journal Issue: 16; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; electrochemical capacitor; electrochemistry; energy density; ionic liquids; operating potential window
Citation Formats
Van Aken, Katherine L., Beidaghi, Majid, and Gogotsi, Yury. Formulation of ionic liquid electrolyte to expand the voltage window of supercapacitors. United States: N. p., 2015.
Web. doi:10.1002/anie.201412257.
Van Aken, Katherine L., Beidaghi, Majid, & Gogotsi, Yury. Formulation of ionic liquid electrolyte to expand the voltage window of supercapacitors. United States. https://doi.org/10.1002/anie.201412257
Van Aken, Katherine L., Beidaghi, Majid, and Gogotsi, Yury. Wed .
"Formulation of ionic liquid electrolyte to expand the voltage window of supercapacitors". United States. https://doi.org/10.1002/anie.201412257. https://www.osti.gov/servlets/purl/1265356.
@article{osti_1265356,
title = {Formulation of ionic liquid electrolyte to expand the voltage window of supercapacitors},
author = {Van Aken, Katherine L. and Beidaghi, Majid and Gogotsi, Yury},
abstractNote = {Abstract An effective method to expand the operating potential window (OPW) of electrochemical capacitors based on formulating the ionic‐liquid (IL) electrolytes is reported. Using model electrochemical cells based on two identical onion‐like carbon (OLC) electrodes and two different IL electrolytes and their mixtures, it was shown that the asymmetric behavior of the electrolyte cation and anion toward the two electrodes limits the OPW of the cell and therefore its energy density. Also, a general solution to this problem is proposed by formulating the IL electrolyte mixtures to balance the capacitance of electrodes in a symmetric supercapacitor.},
doi = {10.1002/anie.201412257},
journal = {Angewandte Chemie (International Edition)},
number = 16,
volume = 54,
place = {United States},
year = {Wed Mar 18 00:00:00 EDT 2015},
month = {Wed Mar 18 00:00:00 EDT 2015}
}
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