Nowadays, the active search for an anode material, which can be used in lithium-ion current sources, takes place. The potential anode materials are transition metal oxides (SnO2, NiO and others). In this work, submicron NiO powder was obtained using the thermal decomposition of Ni(CH3COO)2⋅4H2O. Besides, a NiO/C composite anode was fabricated and its behavior in the anode half-cell of lithium-ion current source was studied during multiple cycling. The workability of the anode material was shown and its main energy characteristics were determined. The discharge capacity of the NiO/C anode was 355 mA⋅h/g at the current of C/10 and Coulomb efficiency was 99–100% after 40 cycles.