An active cathode material for a lithium rechargeable cell is in the form of lithium-containing nickel oxide substituted by three elements including at least cobalt and aluminum. The material has a monoclinic crystal structure and the following general formula: Li.sub.L Ni.sub.(1-C-A-M) Co.sub.C Al.sub.A Mg.sub.M O.sub.2 where: 0.05.ltoreq.L.ltoreq.1.03 0.05.ltoreq.C.ltoreq.0.20 0.11.ltoreq.A.ltoreq.0.20 0.01.ltoreq.M.ltoreq.0.05 and C/A.gtoreq.0.60

Активно материал катода для клетки лития rechargeable in the form of лити-soderja окись никеля замененная 3 элементами включая по крайней мере кобальт и алюминий. Материал имеет моноклинную кристаллическую структуру и following вообще формулу: Li.sub.L Ни.суб.(й-Ч-$$$-NI.SUB.(1-C-A-M) Co.sub.C Al.sub.A Mg.sub.M O.sub.2 где: 0.05.ltoreq.L.ltoreq.1.03 0.05.ltoreq.C.ltoreq.0.20 0.11.ltoreq.A.ltoreq.0.20 0.01.ltoreq.M.ltoreq.0.05 и C/A.gtoreq.0.60