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Title: Formulation of ionic liquid electrolyte to expand the voltage window of supercapacitors

Abstract

We report an effective method to expand the operating potential window (OPW) of electrochemical capacitors based on formulating the ionic liquid (IL) electrolytes. Moreover, 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’s cation and anion toward the two electrodes limits the OPW of the cell and therefore its energy density. Additionally, 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:
 [1];  [1];  [1]
  1. Drexel Univ., Philadelphia, PA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1265356
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: 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. 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. 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 = {We report an effective method to expand the operating potential window (OPW) of electrochemical capacitors based on formulating the ionic liquid (IL) electrolytes. Moreover, 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’s cation and anion toward the two electrodes limits the OPW of the cell and therefore its energy density. Additionally, 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}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 48 works
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Works referenced in this record:

A review of electrode materials for electrochemical supercapacitors
journal, January 2012

  • Wang, Guoping; Zhang, Lei; Zhang, Jiujun
  • Chemical Society Reviews, Vol. 41, Issue 2, p. 797-828
  • DOI: 10.1039/C1CS15060J

Double layer supercapacitor properties of onion-like carbon materials
journal, September 2008

  • Bushueva, E. G.; Galkin, P. S.; Okotrub, A. V.
  • physica status solidi (b), Vol. 245, Issue 10, p. 2296-2299
  • DOI: 10.1002/pssb.200879608