Аннотация:The paper presents the results of a computer simulation of lithium peroxide formation accompanying the discharge of a lithium-air battery (LAB). Two models (biporous and regular biporous) of the structure of the cathode active layer (AL) were compared based on our previous computer simulation of LAB discharge. The use of the regular biporous model was shown to be preferable. The effect of the initial pore radius in the cathode AL on the discharge characteristics was revealed. The discharge characteristics were significantly improved when the initial pore size increased. The use of the regular biporous model together with an attempt to increase the initial pore radius in the cathode AL structure makes it possible to increase the current density and specific capacity of the cathode during LAB discharge by several orders of magnitude.