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Title: Thermal effects of asymmetric electrolytes in electric double layer capacitors

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Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Molecularly Engineered Energy Materials (MEEM)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Power Sources; Journal Volume: 273; Related Information: MEEM partners with University of California, Los Angeles (lead); University of California, Berkeley; Eastern Washington University; University of Kansas; National Renewable Energy Laboratory
Country of Publication:
United States

Citation Formats

d'Entremont, Anna L., and Pilon, Laurent. Thermal effects of asymmetric electrolytes in electric double layer capacitors. United States: N. p., 2015. Web. doi:10.1016/j.jpowsour.2014.09.080.
d'Entremont, Anna L., & Pilon, Laurent. Thermal effects of asymmetric electrolytes in electric double layer capacitors. United States. doi:10.1016/j.jpowsour.2014.09.080.
d'Entremont, Anna L., and Pilon, Laurent. 2015. "Thermal effects of asymmetric electrolytes in electric double layer capacitors". United States. doi:10.1016/j.jpowsour.2014.09.080.
title = {Thermal effects of asymmetric electrolytes in electric double layer capacitors},
author = {d'Entremont, Anna L. and Pilon, Laurent},
abstractNote = {},
doi = {10.1016/j.jpowsour.2014.09.080},
journal = {Journal of Power Sources},
number = ,
volume = 273,
place = {United States},
year = 2015,
month = 1
  • Polyethylene oxide (PEO), polymethyl methacrylate (PMMA), and polyacrylonitrile (PAN) based gel electrolytes with a mixture of ethylene carbonate and propylene carbonate as plasticizer and lithium perchlorate were used to fabricate an electric double-layer capacitor (EDLC). The performance of EDLCs with these gel electrolytes was investigated by using isotropic high-density graphite electrodes. The ion conductivities of various gel electrolytes were of the order of 10{sup {minus}4} to 10{sup {minus}3} S/cm, and they decreased in the order PAN > PEO > PMMA at ambient temperature. Capacitances approaching the value of EDLCs using organic liquid electrolyte, 20 mF/cm{sup 2}, with an isotropic high-densitymore » graphite electrode were obtained in PAN and PMMA gel electrolytes. The EDLC with PMMA-based gel electrolyte showed good charge-discharge behavior over 10{sup 4} cycles at a charge potential of 3.0 V. The rapid progress in the development of electric vehicles and electronic devices has placed increased demand on high-power capacitors. The EDLC is attractive as a rechargeable pulse power source or backup power supply for such applications.« less
  • Electric double-layer capacitors (EDLCs) are electrical devices that store energy by adsorption of ionic species at the inner surface of porous electrodes. Compared with aqueous electrolytes, ionic liquid and organic electrolytes have the advantage of larger potential windows, making them attractive for the next generation of EDLCs with superior energy and power densities. The performance of both ionic liquid and organic electrolyte EDLCs hinges on the judicious selection of the electrode pore size and the electrolyte composition, which requires a comprehension of the charging behavior from a microscopic view. In this Perspective, we discuss predictions from the classical density functionalmore » theory (CDFT) on the dependence of the capacitance on the pore size for ionic liquid and organic electrolyte EDLCs. CDFT is applicable to electrodes with the pore size ranging from that below the ionic dimensionality to mesoscopic scales, thus unique for investigating the electrochemical behavior of the confined electrolytes for EDLC applications.« less