Structure and compatibility of a magnesium electrolyte with a sulphur cathode

被引：586

作者：

Kim, Hee Soo ^{[1
]}

Arthur, Timothy S. ^{[1
]}

Allred, Gary D. ^{[2
]}

Zajicek, Jaroslav ^{[3
]}

Newman, John G. ^{[4
]}

Rodnyansky, Alexander E. ^{[4
]}

Oliver, Allen G. ^{[3
]}

Boggess, William C. ^{[3
]}

Muldoon, John ^{[1
]}

机构：

[1] Toyota Res Inst N Amer, Ann Arbor, MI 48105 USA

[2] Synthonix, Wake Forest, NC USA

[3] Univ Notre Dame, Notre Dame, IN 46556 USA

[4] Evans Analyt Grp, Chanhassen, MN 55317 USA

来源：

NATURE COMMUNICATIONS | 2011年 / 2卷

关键词：

BATTERIES; ELECTROCHEMISTRY; SURFACE;

D O I：

10.1038/ncomms1435

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Magnesium metal is an ideal rechargeable battery anode material because of its high volumetric energy density, high negative reduction potential and natural abundance. Coupling Mg with high capacity, low-cost cathode materials such as electrophilic sulphur is only possible with a non-nucleophilic electrolyte. Here we show how the crystallization of the electrochemically active species formed from the reaction between hexamethyldisilazide magnesium chloride and aluminum trichloride enables the synthesis of a non-nucleophilic electrolyte. Furthermore, crystallization was essential in the identification of the electroactive species, [Mg(2)(mu-Cl)(3)center dot(6)THF](+), and vital to improvements in the voltage stability and coulombic efficiency of the electrolyte. X-ray photoelectron spectroscopy analysis of the sulphur electrode confirmed that the electrochemical conversion between sulphur and magnesium sulfide can be successfully performed using this electrolyte.

引用

页数：6

共 24 条

[1] Building better batteries [J].