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The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors

Electrochemical double layer capacitors (EDLCs) are energy storage devices that have been used for a wide range of electronic applications. In particular, the electrolyte is one of the important components, directly related to the capacitance and stability. Herein, we first report a series of the sm...

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Autores principales: Han, Taihee, Park, Min-Sik, Kim, Jeonghun, Kim, Jung Ho, Kim, Ketack
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Royal Society of Chemistry 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5604401/
https://www.ncbi.nlm.nih.gov/pubmed/28959391
http://dx.doi.org/10.1039/c5sc02755a
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author Han, Taihee
Park, Min-Sik
Kim, Jeonghun
Kim, Jung Ho
Kim, Ketack
author_facet Han, Taihee
Park, Min-Sik
Kim, Jeonghun
Kim, Jung Ho
Kim, Ketack
author_sort Han, Taihee
collection PubMed
description Electrochemical double layer capacitors (EDLCs) are energy storage devices that have been used for a wide range of electronic applications. In particular, the electrolyte is one of the important components, directly related to the capacitance and stability. Herein, we first report a series of the smallest quaternary ammonium salts (QASs), with ether groups on tails and tetrafluoroborate (BF(4)) as an anion, for use in EDLCs. To find the optimal structure, various QASs with different sized head groups and ether-containing tail groups were systematically compared. Comparing two nearly identical structures with and without ether groups, QASs with oxygen atoms showed improved capacitance, proving that ions with oxygen atoms move more easily than their counterparts at lower electric fields. Moreover, the ether containing QASs showed low activation energy values of conductivities, leading to smaller IR drops during the charge and discharge processes, resulting in an overall higher capacitance.
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spelling pubmed-56044012017-09-28 The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors Han, Taihee Park, Min-Sik Kim, Jeonghun Kim, Jung Ho Kim, Ketack Chem Sci Chemistry Electrochemical double layer capacitors (EDLCs) are energy storage devices that have been used for a wide range of electronic applications. In particular, the electrolyte is one of the important components, directly related to the capacitance and stability. Herein, we first report a series of the smallest quaternary ammonium salts (QASs), with ether groups on tails and tetrafluoroborate (BF(4)) as an anion, for use in EDLCs. To find the optimal structure, various QASs with different sized head groups and ether-containing tail groups were systematically compared. Comparing two nearly identical structures with and without ether groups, QASs with oxygen atoms showed improved capacitance, proving that ions with oxygen atoms move more easily than their counterparts at lower electric fields. Moreover, the ether containing QASs showed low activation energy values of conductivities, leading to smaller IR drops during the charge and discharge processes, resulting in an overall higher capacitance. Royal Society of Chemistry 2016-03-01 2015-11-30 /pmc/articles/PMC5604401/ /pubmed/28959391 http://dx.doi.org/10.1039/c5sc02755a Text en This journal is © The Royal Society of Chemistry 2016 http://creativecommons.org/licenses/by/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Chemistry
Han, Taihee
Park, Min-Sik
Kim, Jeonghun
Kim, Jung Ho
Kim, Ketack
The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors
title The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors
title_full The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors
title_fullStr The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors
title_full_unstemmed The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors
title_short The smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors
title_sort smallest quaternary ammonium salts with ether groups for high-performance electrochemical double layer capacitors
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5604401/
https://www.ncbi.nlm.nih.gov/pubmed/28959391
http://dx.doi.org/10.1039/c5sc02755a
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