A kind of preparation method of cobalt manganese oxygen catalyst

Abstract

The invention provides a preparation method of a cobalt-manganese-oxide catalyst and an application of the cobalt-manganese-oxide catalyst in a lithium-air battery. The cobalt-manganese-oxide catalyst is prepared by rapidly stirring a solution at a room temperature. The method specifically comprises the following steps: (1) dissolving potassium permanganate and manganese sulfate into water, mixing the solution evenly, carrying out a reaction at the room temperature and carrying out suction filtration and drying to obtain amorphous MnO2 powder; (2) dispersing the obtained amorphous MnO2 powder and cobalt chloride into water, and stirring and mixing the solution evenly to obtain a mixed liquid I; (3) mixing sodium borohydride and an inorganic base, and dissolving the mixture into water for stirring evenly, so as to obtain a mixed liquid II; and (4) adding the obtained mixed liquid II to the mixed liquid I, carrying out the reaction under a stirring condition, so as to obtain a product, namely the cobalt-manganese-oxide catalyst. The related raw materials are cheap and available; the process is simple and easy to achieve; the yield is relatively high; and the prepared cobalt-manganese-oxide catalyst is in a porous nanosphere shape, and displays excellent electrochemical properties when applied to the lithium-air battery.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials and electrochemical device materials, and in particular relates to a preparation method of a cobalt-manganese-oxygen catalyst. Background technique [0002] With the intensified consumption of irreversible energy such as petroleum, the chemical energy system is facing increasingly severe challenges. However, the energy density of traditional lithium-ion batteries still cannot meet the growing energy demand. In this case, because the energy density of lithium-air batteries is much higher than that of lithium-ion batteries, its specific energy or energy density is comparable to that of gasoline and diesel. Similarly, a single charge is expected to extend the range of electric vehicles by more than 500km, which has attracted widespread attention. More importantly, lithium-air batteries do not produce harmful pollutants during the reaction process, and are a new type of energy storage sys...

AI Technical Summary

Problems solved by technology

However, the high raw material cost of noble metals is not conducive to practical applications. Therefore, it is of great application significance to further explore other catalysts suitable for lithium-air batteries, adjust their size, morphology and internal structure, and improve their preparation processes and conditions.

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