Reversibility of Mg/Mg2+ couple in a gel polymer electrolyte

Investigations on solid state rechargeable magnesium batteries are consider ed important similar to lithium batteries. In view of negligible hazards an d less reactivity of the magnesium, in comparison with lithium, studies on rechargeable magnesium batteries are expected to have a wide scope in futur e. Solid polymer electrolytes, which conduct Mg2+ ions and reversibility of a Mg/Mg2+ couple are essential components of the studies. In the present i nvestigations, the existence of reversibility of a Mg/Mg2+ couple in a gel polymer electrolyte (GPE) medium is established for the first time in liter ature. Results obtained by electrochemical impedance spectroscopy and cycli c voltammetry on Mg/GPE/Mg, SS/GPE/SS symmetrical cells show evidence for t he reversibility. (C) 1999 Elsevier Science Ltd. All rights reserved.