FIELD: battery production. SUBSTANCE: invention relates to materials of lithium-ion batteries with high specific energy. An elementary unit of a battery consists of current collectors, an anode, a cathode, an electrolyte and an insulator. Thin–film electrolytes are used as electrolytes, lithium-cation-conducting materials are used as cathodes. A multilayer graphite-silicene composition is used as an anode with a ratio of 5 monoatomic layers of silicene on a graphite substrate of 4-8 monoatomic layers of graphene. The silicene sheets are separated by a gap of 0.24-0.75 nm. The graphite substrate is preferably made of 8 layers and is coated with silicene on both sides. A lithium-ion battery is made from parallel connected elementary cells placed in a housing isolated from the external environment of the atmosphere. The cells can be connected mirrorlike relative to the plane parallel to the plane of the silicene. EFFECT: increase in the number of discharge/charge cycles of the battery to 5000 and above without reducing the specific capacity of the anode below 3500 mAh/g in the operating temperature range (from -50 to 100°C), reducing the size and weight of the lithium-ion battery, eliminating the volumetric expansion of the anodes of the elementary cells and the lithium-ion battery as a whole. 5 cl, 2 dwg, 1 tbl.