CATHODE CATALYST FOR LITHIUM-AIR SECONDARY BATTERY, METHOD OF MANUFACTURING THE SAME, AND LITHIUM-AIR SECONDARY BATTERY COMPRISING THE SAME

摘要

The present invention relates to a cathode catalyst for a lithium-air secondary battery, a manufacturing method thereof and a lithium-air secondary battery including the same. The manufacturing method for a cathode catalyst for a lithium-air secondary battery of the present invention comprises a first step of forming an aqueous solution by dissolving manganese ion precursors in distilled water; a second step of manufacturing a mixture by stirring the aqueous solution formed in the first step with a compound selected from the group consisting of potassium permanganate (KMnO_4), sodium permanganate (NaMnO_4), ammonium permanganate (NH_4MnO_4) and calcium permanganate (Ca(MnO_4)_2); a third step of synthesizing alpha phase manganese oxide nanowires (α-MnO_2 nanowires) by hydrothermally synthesizing the mixture manufactured in the second step; and a fourth step of pulverizing the alpha phase manganese oxide nanowires (α-MnO_2 nanowires) by drying the same. The cathode catalyst for a lithium-air secondary battery manufactured according to the manufacturing method of the present invention is able to lower charge and discharge overvoltage by accelerating oxygen reaction in a positive electrode of a lithium-air secondary battery and is able to improve energy efficiency.