In this work structural and transport properties of layered LiNi1−y−z Co y Mn z O2 (y =0.25, 0.35, 0.5 and z =0.1) cathode materials are presented. In the considered group of oxides, LiNi1−y−z Co y Mn z O2, there is no clear correlation between electrical conductivity and the a parameter (M–M distance in the octahedra layers). A non-monotonic modification of electrical properties of Li x Ni0.65Co0.25Mn0.1O2 cathode materials is observed upon lithium deintercalation.