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Properties of Asymmetric Benzyl-Substituted Ammonium Ionic Liquids and Their Electrochemical Properties

Properties of Asymmetric Benzyl-Substituted Ammonium Ionic Liquids and Their Electrochemical... Benzyl-substituted quaternary ammonium ions were used to form room-temperature ionic liquids with chloroaluminate ions. Asymmetric ammonium structures significantly lowered the melting point of the ionic liquid. Asymmetric benzyl-substituted ammonium chlorides were mixed with to form acidic room-temperature ionic liquids. It is shown that the melting point and viscosity are a function of the symmetry of the quaternary ammonium ion and its molecular weight. Asymmetry and low molecular weight favor lower viscosity and melting point, and higher conductivity. These liquids were neutralized with NaCl and tested as electrolytes for sodium batteries. The neutralized ionic liquid of benzyldimethylethylammonium chloride had a low self-discharge current (3.96 μA/cm2) at room temperature on a platinum electrode substrate. © 2005 The Electrochemical Society. All rights reserved. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Electrochemical Society IOP Publishing

Properties of Asymmetric Benzyl-Substituted Ammonium Ionic Liquids and Their Electrochemical Properties

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Copyright
Copyright © 2005 ECS - The Electrochemical Society
ISSN
0013-4651
eISSN
1945-7111
DOI
10.1149/1.1850335
Publisher site
See Article on Publisher Site

Abstract

Benzyl-substituted quaternary ammonium ions were used to form room-temperature ionic liquids with chloroaluminate ions. Asymmetric ammonium structures significantly lowered the melting point of the ionic liquid. Asymmetric benzyl-substituted ammonium chlorides were mixed with to form acidic room-temperature ionic liquids. It is shown that the melting point and viscosity are a function of the symmetry of the quaternary ammonium ion and its molecular weight. Asymmetry and low molecular weight favor lower viscosity and melting point, and higher conductivity. These liquids were neutralized with NaCl and tested as electrolytes for sodium batteries. The neutralized ionic liquid of benzyldimethylethylammonium chloride had a low self-discharge current (3.96 μA/cm2) at room temperature on a platinum electrode substrate. © 2005 The Electrochemical Society. All rights reserved.

Journal

Journal of the Electrochemical SocietyIOP Publishing

Published: Jan 5, 2005

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