电解质
电化学
化学
镁
电化学窗口
无机化学
四氢呋喃
窗口(计算)
材料科学
离子电导率
路易斯酸
热稳定性
阴极
化学工程
电极
冶金
计算机科学
物理化学
工程类
操作系统
作者
Oren S. Mizrahi,Nir Amir,Elad Pollak,Orit Chusid,Vered Marks,Hugo E. Gottlieb,Liraz Larush,Ella Zinigrad,Doron Aurbach
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2008-02-01
卷期号:155 (2): A103-A103
被引量:378
摘要
Electrolyte solutions for rechargeable Mg batteries were developed, based on reaction products of phenyl magnesium chloride (PhMgCl) Lewis base and Alcl 3 Lewis acid in ethers. The transmetallation of these ligands forms solutions with Mg x Cl + y and AlCl 4-n Ph n - ions as the major ionic species, as analyzed by multinuclei nuclear magnetic resonance spectroscopy. Tetrahydrofuran (THF) solutions of (PhMgCl) 2 -Alcl 3 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 Ω -1 cm -1 could be measured between -10 and 30°C for these solutions, similar to that of standard electrolyte solutions for Li batteries. Mg ions intercalate reversibly with Chevrel phase (Mg x Mo 6 S 8 ) 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.
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