Roles of additives in the trihexyl(tetradecyl) phosphonium chloride ionic liquid electrolyte for primary mg-air cells Yan,Y, Khoo,T, Pozo-Gonzalo,C, Hollenkamp,AF, Howlett,PC, MacFarlane,DR and Forsyth,M 2014, Roles of additives in the trihexyl(tetradecyl) phosphonium chloride ionic liquid electrolyte for primary mg-air cells, Journal of the Electrochemical Society, vol. 161, no. 6, pp. A974-A980, doi: 10.1149/2.031406jes. Attached Files Name Description MIMEType Size Downloads Title Roles of additives in the trihexyl(tetradecyl) phosphonium chloride ionic liquid electrolyte for primary mg-air cells Author(s) Yan,Y Khoo,T orcid.org/0000-0001-8023-0241 Pozo-Gonzalo,C orcid.org/0000-0002-7890-6457 Hollenkamp,AF Howlett,PC orcid.org/0000-0002-2151-2932 MacFarlane,DR Forsyth,M orcid.org/0000-0002-4273-8105 Journal name Journal of the Electrochemical Society Volume number 161 Issue number 6 Start page A974 End page A980 Total pages 7 Publisher Electrochemical Society Inc. Place of publication NJ, United States Publication date 2014-04-29 ISSN 0013-4651 1945-7111 Keyword(s) Science & Technology Physical Sciences Technology Electrochemistry Materials Science, Coatings & Films Materials Science RECHARGEABLE MAGNESIUM BATTERIES METAL-IONS WATER Summary As reported previously, water saturated trihexyl(tetradecyl)phosphonium chloride ([P6,6,6,14][Cl]) ionic liquid (IL) is a promising electrolyte for magnesium-air batteries. The added water plays an important role in enabling high rate and high efficiency Mg dissolution while stabilizing the Mg interphase. In this work, the role of the water was investigated by replacement with other additives such as toluene and tetrahydrofuran to specifically target the assumed roles of water, namely: (i) enhancement of transport properties; (ii) complexation and stabilization of the Mg anode; (iii) provision of active protons for the cathodic reaction. Discharge tests show that ethylene glycol supports comparable performance to that provided by water. Examination of the viscosity and conductivity of different [P6,6,6,14][Cl]/additive mixtures indicates that a simple consideration of solution characteristics cannot explain the observed trends. Rather, other factors, such as the presence of active protons and/or oxygen-donor groups, are also key features for the development of IL electrolytes for practical magnesium-air cells. Finally, the presence of ethylene glycol in the electrolyte results in a complex gel on the Mg interface, similar to that found in the presence of water. This may also play a role in enabling stable discharge of the Mg anode. © 2014 The Electrochemical Society. Language eng DOI 10.1149/2.031406jes Field of Research 091205 Functional Materials 030604 Electrochemistry Socio Economic Objective 850602 Energy Storage (excl. Hydrogen) HERDC Research category C1 Refereed article in a scholarly journal ERA Research output type C Journal article Grant ID CE0561616 Copyright notice ©2014, Electrochemical Society, Inc. Persistent URL http://hdl.handle.net/10536/DRO/DU:30069136 Document type: Journal Article Collections: Institute for Frontier Materials GTP Research Related Links Link Description Connect to published version Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Tue, 20 Jan 2015, 11:55:52 EST Tue, 20 Jan 2015, 11:56:30 EST Tue, 20 Jan 2015, 13:40:05 EST Thu, 29 Jan 2015, 05:05:20 EST Wed, 04 Feb 2015, 08:38:08 EST Wed, 04 Feb 2015, 08:44:01 EST Wed, 04 Feb 2015, 08:45:56 EST Wed, 04 Feb 2015, 08:48:55 EST Wed, 14 Oct 2015, 14:11:17 EST Filtered Full Citation counts:   Cited 14 times in TR Web of Science Cited 15 times in Scopus Search Google Scholar Access Statistics: 640 Abstract Views, 2 File Downloads  -  Detailed Statistics Created: Tue, 20 Jan 2015, 11:56:30 EST

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