METHOD FOR PRODUCING CATHODE MATERIAL FOR RECHARGEABLE LITHIUM-AIR BATTERIES, CATHODE MATERIAL FOR RECHARGEABLE LITHIUM-AIR BATTERIES AND RECHARGEABLE LITHIUM-AIR BATTERY

摘要

A method for producing a cathode material for rechargeable lithium-air batteries, which has a cathode catalyst loaded onto carbon, the method comprising: a step of sonicating a mixed solution comprising a carbon having a specific surface area of 20 to 1,500m2/g, a surfactant and a solvent, and a step of in situ synthesis of the cathode catalyst by (1) adding a cathode catalyst raw material to the mixed solution and (2) adding a solution containing an oxidant to the mixed solution to cause in situ precipitation of the cathode catalyst onto the carbon, the catalyst having a wire form in which the short axis length is smaller than that of the carbon and is 2 to 50 nm and the long axis length is longer than that of the carbon and is 5 to 200 nm; and a cathode material for rechargeable lithium-air batteries, which has a cathode catalyst loaded onto carbon, wherein the percentage of the weight of the cathode catalyst to the total of the weights of the carbon and cathode catalyst ("the weight of the cathode catalyst" / " the total of the weights of the carbon and cathode catalyst") is 1% or more and 50% or less; and a rechargeable lithium-air battery comprising a cathode material produced by the above method.