Formulation of ionic liquid electrolyte to expand the voltage window of supercapacitors
Journal Article
·
· Angewandte Chemie (International Edition)
- Drexel Univ., Philadelphia, PA (United States)
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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1265356
- Alternate ID(s):
- OSTI ID: 1786063
- Journal Information:
- Angewandte Chemie (International Edition), Vol. 54, Issue 16; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 223 works
Citation information provided by
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