Abstract:
PURPOSE: A lithium-air battery apparatus is provided to maintain a stable battery discharging state by minimizing changes in oxygen supply amount by releasing absorbed oxygen, thereby maintaining a stable battery discharging state. CONSTITUTION: A lithium-air battery apparatus comprises: a negative electrode using a lithium metal; and a positive electrode using a carbon material and a catalyst. The catalyst consists of a metal oxide and an oxygen absorbing material. The oxygen absorbing material absorbs oxygen when oxygen is abundant, and releases oxygen when oxygen is lacking to maintain a stable battery discharging state. The oxygen absorbing material is ceria(CeO2). [Reference numerals] (AA) In case of oxygen enrichment; (BB) In case of oxygen deficiency
Abstract:
PURPOSE: A manufacturing method of an oxide manganese/carbon composite for a lithium/air secondary battery is provided to increase dispersity and binding force of carbon and manganese oxide by reducing a solution of carbon and potassium permanganate, and to obtain the lithium/air battery with improved charging and discharging cyclability. CONSTITUTION: A manufacturing method of an oxide manganese/carbon composite for a lithium/air secondary battery comprises: a step of manufacturing a metal permanganate solution by dissolving metal permanganate powder into a solvent; a step of dispersing carbon into the metal permanganate solution, and manufacturing a manganese oxide/carbon composite by using a reducing agent; and a step of mixing a catalyst which is manufactured in the second step into poly(vinylidene fluoride), and wetting the mixture into nickel foam. The lithium/air secondary battery comprises the manganese oxide/carbon composite as an air electrode.