Journal of The Electrochemical Society · 1993 · 242 citations · 0 references
Natural SciencesChemistryMaterials ScienceElectrochemical EngineeringElectrochemistryInorganic ChemistryBattery MaterialsElectrochemical Energy StorageElectrode MaterialsElectrode-electrolyte InterfacesElectrolyte MaterialsElectrolyte SolutionsCoulombic EfficiencyElectrochemical IntercalationElectrolyte ChemistryMagnesium-ion BatteriesRechargeable BatteriesTransition Metal Oxides
The electrochemistry of TiS<sub>2</sub>, ZrS<sub>2</sub>, RuO<sub>2</sub>, Co<sub>3</sub>O<sub>4</sub>, and V<sub>2</sub>O<sub>5</sub> has been studied in several organic solvents containing Mg(ClO<sub>4</sub>)<sub>2</sub> in view of their application as positive electrodes in rechargeable magnesium batteries. Only V<sub>2</sub>O<sub>5</sub> showed promising coulombic capacity and reversibility. Mg<sup>2+</sup> insertion into this oxide depends on the ratio between the amounts of H<sub>2</sub>0 and Mg<sup>2+</sup> as well as on the absolute amount of H<sub>2</sub>0 in the electrolyte. Water molecules preferentially solvating Mg<sup>2+</sup> ions appear to facilitate the insertion process. The highest coulombic capacities of up to 170 Ah/kg were reached in acetonitrile solutions containing 1M Mg(ClO<sub>4</sub>)<sub>2</sub> + 1M H<sub>2</sub>O.