Synthesis and investigation of electrolytic sodium-vanadium oxide compounds for cathodes of lithium batteries: the production of compounds with stable initial characteristics

Heterogeneous vanadium oxide compounds were prepared during electrolysis of vanadyl sulfate solution in the presence of sodium ions. The limits of process parameters for synthesis of electrolysis products with stable initial electrochemical characteristics were ascertained. It is shown that the presence of sodium ions gives rise to the deposit adhesion o substrate. Electrochemical properties of the electrolytic deposits depend on the content of sodium ions in deposition electrolyte and subsequent thermal treatment of the deposit. Specific discharge capacity of electrolytic Na-vanadium oxide compounds may reach 320 Ah/kg in case of discharge up to 2.0 V at a density of 100 μA/cm2