Discharge behaviour and interfacial properties of a magnesium battery incorporating trihexyl(tetradecyl)phosphonium based ionic liquid electrolytes

被引：41
|
作者：
Khoo, Timothy [1 ,4 ]
Somers, Anthony [2 ]
Torriero, Angel A. J. [2 ]
MacFarlane, Douglas R. [3 ,4 ]
Howlett, Patrick C. [2 ,4 ]
Forsyth, Maria [2 ,4 ]
机构：
[1] Monash Univ, Dept Mat Engn, Melbourne, Vic 3800, Australia
[2] Deakin Univ, Inst Frontier Mat, Melbourne, Vic 3125, Australia
[3] Monash Univ, Sch Chem, Melbourne, Vic 3800, Australia
[4] Australian Res Council, Ctr Excellence Electromat Sci, Canberra, ACT, Australia
来源：
ELECTROCHIMICA ACTA | 2013年 / 87卷
基金：
澳大利亚研究理事会;
关键词：
Ionic liquid; Trihexyl(tetradecyl)phosphonium chloride; Mg-air; Magnesium battery; Interface; AIR BATTERIES;
D O I：
10.1016/j.electacta.2012.09.072
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Magnesium-air batteries are a promising high-energy density power source that utilises an active magnesium electrode and oxygen. Herein, the magnesium surface formed during 0.2 mA/cm(2) galvanostatic discharge in trihexy(tetradecyl)phosphonium chloride ionic liquid electrolyte was characterised using FTIR, XPS and mass spectroscopy and the complex nature of the interfacial film formed is described. This film has a conductive gel-like structure and consists of hydrated organophosphonium magnesium(hydroxyl)chlorides. A laboratory synthesised form of the gel showed comparable discharge behaviour and was able to support a discharge current of 0.05 mA/cm(2). The ionic liquid is shown to support oxygen reduction currents of greater than 0.8 mA/cm(2), suggesting that this electrolyte is a suitable candidate for magnesium-air battery applications. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：701 / 708
页数：8
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