4.6 Article

Magnesium ion conducting, room temperature molten electrolytes

Journal

ELECTROCHEMISTRY COMMUNICATIONS
Volume 11, Issue 10, Pages 2027-2031

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.08.045

Keywords

Room temperature molten electrolyte; Magnesium rechargeable battery; Electrochemical reversibility; Magnesium deposition and dissolution; Vibrational spectroscopy; Magnesium ion conductivity; Secondary battery; Spectroscopic characterization

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Room temperature, magnesium ion conducting binary molten electrolyte consisting of acetamide and magnesium perchlorate has been prepared and characterized. The molten liquid is very stable and shows high ionic conductivity, of the order of several mS cm(-1) at 25 degrees C with other favourable physicochemical properties. Vibrational spectroscopic studies reveal that the free ion concentration is higher than that of ion pairs and aggregates in the melt. The electrochemical reversibility of magnesium deposition and dissolution is demonstrated using voltammetry and impedance studies. Preliminary studies on rechargeable batteries assembled using gamma-MnO2 and Mg metal as the electrodes together with the molten electrolyte show high discharge capacity. (C) 2009 Elsevier B.V. All rights reserved.

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