A method for preparing a room-temperature-operable metal calcium-oxygen battery

Abstract

The application provides a preparation method of a room-temperature-operable metal calcium-oxygen battery, which comprises the following steps: polishing a metal calcium negative electrode to be smooth and flat, and removing a surface oxide layer; using a foamed nickel or a stainless steel mesh as a positive electrode current collector, loading carbon active material in the positive electrode current collector to prepare a carbon material positive electrode, and drying the carbon material positive electrode; mixing an electrolyte calcium salt, an ionic liquid and an organic solvent, stirring at room temperature until the mixture is clear and transparent to obtain an organic electrolyte, and using activated 4A molecular sieves to remove trace water in the organic electrolyte; using glass fiber filter paper as a battery diaphragm, and constructing the polished smooth metal calcium negative electrode, the dried carbon material positive electrode, the glass fiber filter paper and the water-removed organic electrolyte in a Swagelok battery to obtain the battery. The metal calcium-oxygen battery prepared by using the preparation method can stably work in air at room temperature, and has excellent electrochemical performance. In addition, the preparation method is simple in process and suitable for large-scale industrial production.

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