Electrolyte solutions with a wide electrochemical window for recharge magnesium batteries

被引:450
作者
Mizrahi, Oren [1 ]
Amir, Nir [1 ]
Pollak, Elad [1 ]
Chusid, Orit [1 ]
Marks, Vered [1 ]
Gottlieb, Hugo [1 ]
Larush, Liraz [1 ]
Zinigrad, Ella [1 ]
Aurbach, Doron [1 ]
机构
[1] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel
关键词
D O I
10.1149/1.2806175
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Electrolyte solutions for rechargeable Mg batteries were developed, based on reaction products of phenyl magnesium chloride (PhMgCl) Lewis base and AlCl3 Lewis acid in ethers. The transmetallation of these ligands forms solutions with MgxCly+ and AlCl4-nPhn- ions as the major ionic species, as analyzed by multinuclei nuclear magnetic resonance spectroscopy. Tetrahydrofuran (THF) solutions of (PhMgCl)(2)-AlCl3 exhibit optimal properties: highly reversible Mg deposition (100% cycling efficiency) with low overvoltage: < 0.2 V and electrochemical windows wider than 3 V. A specific conductivity of 2-5 X 10(-3) Omega(-1) cm(-1) could be measured between -10 and 30 degrees C for these solutions, similar to that of standard electrolyte solutions for Li batteries. Mg ions intercalate reversibly with Chevrel phase (MgxMo6S8) cathodes in these solutions. These systems exhibit high thermal stability. The solutions may enable the use of high voltage, high-capacity Mg insertion materials as cathodes and hence open the door for research and development of high- energy density, rechargeable Mg batteries. (c) 2007 The Electrochemical Society.
引用
收藏
页码:A103 / A109
页数:7
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