<b>Abstract</b>— <p>An original method for the synthesis of silver vanadium oxide (Ag₂V₄O₁₁) has been developed, which includes the mechanochemical activation of a mixture of vanadium pentoxide and silver nitrate in a planetary mill, followed by thermal treatment in a muffle furnace at a temperature of 700°C for 5 h in an air environment, resulting in a product yield of 99.5% in a highly dispersed state. It has been established that the introduction of 8 wt % Ag₂V₄O₁₁ allows for a twofold improvement in polarization characteristics compared to the conventional (CF_<i>x</i>)_<i>n</i> sample. It has been shown that, at a discharge current density above 1.0 mA/cm², there is a significant decrease in specific discharge capacity and average discharge potential for both the traditional (CF_<i>x</i>)_<i>n</i> sample and samples with a low content of silver vanadium oxide. Increasing the content of Ag₂V₄O₁₁ above 8 wt % leads to a reduction in the specific capacity of the samples due to the lower energy density of this material compared to that of (CF_<i>x</i>)_<i>n</i>. The highest energy density at a higher discharge potential is exhibited by the sample with an 8 wt % content of silver vanadium oxide (630 mAh/g), while the traditional sample has a capacity of 570 mAh/g. Electrodes based on the composition fluorocarbon–silver vanadium oxide and primary cells based on them surpass known analogs in terms of capacity, stability, and retention.</p>