The invention discloses a preparation method for a
ruthenium-
oxide-based
electrode material. The preparation method comprises the following steps of dissolving 2-5 g of hydration
ruthenium trichloride and 1-3 g of carbon material into 100-200 ml of
alcohol-water solution, and evenly mixing the mixture to obtain
mixed solution; adding 10-150 ml of NH4HCO3 solution with the concentration of 1.0-2.0 mol / L into the
mixed solution, and adjusting a PH value into 7-9 to obtain Ru(OH)4; after aging is conducted and foreign ions are removed in a centrifugal mode, conducting
dehydration processing to obtain a
composite electrode material of amorphous
ruthenium dioxide and the carbon material; adding a conductive agent of carbon nano-tubes or KS6 conductive
graphite counting for 10-20% of the total weight into the prepared
composite electrode material, and fully mixing and
grinding the mixture to obtain the ruthenium-
oxide-based
electrode material. Precursors adopted in the preparation method for the ruthenium-
oxide-based
electrode material are the hydration
ruthenium trichloride, the carbon material and
ammonium bicarbonate, mixing is more even, the carbon nano-tubes or KS6 conductive
graphite is selected to serve as the conductive agent, the
composite electrode material has the advantages of being high in specific capacity, low in
equivalent series resistance, long in service life, low in cost and the like.