Lithium vanadium bronze LiV3O8 was synthesized by the method of aqueous solution and by solid state method. The synthesized materials were characterized using X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM). Thermal stability and temperature dependences of conductivity for the bronze samples synthesized by both methods were studied. At room temperature the conductivity of the bronze obtained by solid state method is three times higher. LiV3O8| Li3.4Si0.4P0.6O4 |LiV3O8 solid state cell was analysed by pulse potentiometry and voltammetry at 320°С. It is shown that lithium vanadium bronze has a good adhesion to Li+ solid electrolyte, does not react with it below 330 оС and does not degrade with cycling. It was established that the microstructure of the active material of the cathode, which determines the kinetics of Li+ intercalation/deintercalation, dominates the characteristics of the investigated cell.