Electrochemical properties of lithium air batteries with Pt100−xRux (0 ≤ x ≤ 100) electrocatalysts for air electrodes

Abstract Electrochemical properties of lithium air secondary battery cells with Pt 100− x Ru x (0 ≤  x  ≤ 100) electrocatalysts, prepared by the formic acid reduction method and loaded into air electrodes were examined in 1 mol/l LiTFSA/TEGDME electrolyte solution. Among the cells, the one with the Pt 10 Ru 90 ( x  = 90)/carbon sample showed the largest discharge capacity of 1014 mAh/g and the lowest average charge voltage of 3.74 V. In addition, the x  = 90 sample showed comparatively good cycle stability with discharge capacity of over 800 mAh/g at the 8th cycle. As a result, x  = 90 was confirmed to be the optimized composition as the electrocatalyst for the air electrode.