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Title: Formulation of Ionic-Liquid Electrolyte To Expand the Voltage Window of Supercapacitors

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:
; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1386357
DOE Contract Number:
ERKCC61
Resource Type:
Journal Article
Resource Relation:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 54; Journal Issue: 16; Related Information: FIRST partners with Oak Ridge National Laboratory (lead); Argonne National Laboratory; Drexel University; Georgia State University; Northwestern University; Pennsylvania State University; Suffolk University; Vanderbilt University; University of Virginia
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; catalysis (heterogeneous), solar (fuels), energy storage (including batteries and capacitors), hydrogen and fuel cells, electrodes - solar, mechanical behavior, charge transport, materials and chemistry by design, synthesis (novel materials)

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. doi: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. doi:10.1002/anie.201412257.
@article{osti_1386357,
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 = {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}
}