Electrochemical properties of carbon materials and La0.6Sr 0.4Fe0.6Mn0.4O3 electrocatalysts for air electrodes of lithium-air secondary batteries

Abstract

Lithium-air batteries using Ketjen Black-EC600JD for their air electrodes exhibited a rather large discharge capacity of about 3000 mAh g-1 at a current density of 0.05 mA cm-2. However, the cycle performance of the batteries was very poor due to the high overpotential for charging. The cycle properties were greatly improved by adding the Fe-Mn-based perovskite-type oxide, La0.6Sr0.6Fe0.6Mn0.4O 3 to the air electrodes as an electrocatalyst.