LITHIUM AIR SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a lithium air secondary battery which allows a lithium air secondary battery to be operated as a high-capacity secondary battery, and which is small in voltage difference between charge and discharge, and small in the decrease in discharge capacity even when charge and discharge cycles are repeated.SOLUTION: A lithium air secondary battery comprises: an air electrode including a conductive material, a catalyst and a binding agent; a negative electrode including metallic lithium or a lithium-containing substance; and an electrolyte in contact with the air electrode and the negative electrode. The catalyst of the air electrode includes a praseodymium (Pr) oxide. It is preferable that the praseodymium oxide is hexapraseodymium undecaoxide (PrO-4 PrO). It is particularly preferable that the praseodymium (Pr) oxide includes crystalline water.