Preparation method for ruthenium-oxide-based electrode material

Abstract

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.

Description

technical field [0001] The invention relates to a method for preparing a ruthenium oxide-based electrode material, in particular to a preparation method for an electrochemical supercapacitor ruthenium oxide-based electrode material. Background technique [0002] As a new type of energy device with fast charging and discharging, high energy storage density and large capacity, supercapacitor has broad application prospects in the fields of mobile communication, national defense technology, green energy, and electric vehicles. According to the energy storage principle, supercapacitors can be divided into electric double layer capacitors based on the electric double layer energy storage mechanism and electrochemical capacitors based on the faradaic redox reaction energy storage mechanism. According to different electrode materials, electrochemical capacitors are divided into metal oxides Supercapacitors and conductive polymer supercapacitors, among which metal oxide ruthenium ox...

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Problems solved by technology

The second is the cathodic electrodeposition method to deposit ruthenium oxide on substrates such as tantalum or titanium, but it is difficult to deposit directly on the surface of common collectors such as tantalum or titanium.

The third is the preparation of ruthenium oxide by cyclic voltammetry electrodeposition. Due to the poor conductivity of the oxide, the internal resistance of the surface will increase after electrodeposition to form a film, and the deposition amount is very small, which is not suitable for large-scale production.

The fourth is to form a ruthenium oxide film on the surface of tantalum or titanium base by coating thermal decomposition method, but the conditions are not easy to control and the requirements are harsh

The above four methods generally have disadvantages such as high equipment requirements or low ruthenium oxide output or poor adhesion