KR840002914A - Electrode composition and preparation method thereof - Google Patents

Abstract

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Description

Electrode composition and preparation method thereof

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Claims (23)

Electrode composition An electrode composition, characterized in that the average particle diameter of the coating particles is 0.3mm to 2.5cm and a part of the substrate is coated with a mixture of a binder and an electrically conductive catalyst of electrochemical activity. The electrode composition according to claim 1, wherein the substrate is selected from among aggregates in which the substance, the solid substance or the small particles are bound. The electrode composition of claim 2, wherein the substrate is selected from steel, iron, nickel, platinum, copper, silver or graphite. 4. Electrode composition according to claim 1, 2 or 3, characterized in that the coating is composed of a conjugate of a hydrophobic polymer and a catalyst having a surface area of 100 to 100 m 2 / g. 5. The electrode composition of claim 4, wherein the catalyst is a burning reaction catalyst selected from carbon black, activated carbon, platinum or silver. 6. The electrode composition of claim 5, wherein the catalyst is carbon black and the catalyst surface area is 150 to 500 m < 2 > / g. The electrode composition according to claim 4, wherein the catalyst is a mixture or compound thereof mixed with carbon black decomposition catalyst selected from silver and platinum and carbon black. The electrode composition according to any one of claims 1 to 7, wherein the average diameter of the particles is 0.7 mm to 4 mm. The electrode composition of claim 1, wherein the substrate is a mixture of a solid fluorocarbon binder with a catalyst selected from the group consisting of silver, carbon black, platinum, and activated carbon. The electrode composition of claim 1, wherein the substrate is electrically conductive and completely covered with the mixture. An electrode composition comprising forming a flow mixture of an electrochemically active electroconductive catalyst and a binder and coagulating the flow mixture to bind the catalyst to a matrix to form electrode composition coated particles having an average diameter of 0.3 mm to 2.5 cm. . 12. The method of claim 11, wherein the binder is heated to a temperature at least above the softening point of the binder to form a flow mixture, and the flow mixture is cooled to a temperature below the softening point of the binder to bind the catalyst to the substrate. 12. The method of claim 11, wherein the catalyst, binder and substrate are dispersed in a liquid to form a fluid mixture, and the catalyst is bonded to the substrate by heating the fluid mixture to evaporate the liquid. 12. The process of claim 11 wherein the binder is dissolved in a solvent to form a fluid mixture and the fluid mixture is heated to evaporate the solvent to bind the catalyst to the substrate. 12. The process of claim 11 wherein the catalyst is carbon black, the binder is polytetrafluoroethylene, and the weight ratio of carbon black to binder is 4: 1 to 1: 4. 12. The method of claim 11, wherein a surfactant is added to the mixture. 12. The method according to claim 11, wherein the second catalyst, which is a peroxide decomposition catalyst, is added, and the content of the peroxide decomposition catalyst is 1 to 35% by weight of the total catalyst, and the carbon black content is 65 to 99% by weight of the total catalyst. How to feature. At least one of the electrodes is formed of an electrode composition in which at least a portion of the substrate is coated with an electrically conductive mixture composed of a hydrophobic material and at least one catalyst, wherein the average number of coated particles in the electrode composition is 0.3 mm to 2.5 cm, respectively. Supplying an aqueous electrolyte solution to an electrolytic cell characterized by consisting of two laminated coating layers and passing a current between the anode and the cathode; A method of electrolysis of an aqueous electrolyte solution in an electrolytic cell having a positive electrode in a positive electrode electrolytic chamber and a negative electrode in a negative electrode electrolytic chamber for recovering an electrolytic product. 19. The method of claim 18, wherein an ion permeable membrane is positioned between the anode and the cathode. 20. The method according to claim 18 or 19, wherein an oxygen-containing gas is supplied to the cathode. At least one of the positive electrode and the negative electrode is formed of an electrode composition in which at least part of the substrate is coated with an electrically conductive mixture composed of a hydrophobic material and at least one catalyst, and the average particle diameter of the coated particles in the electrode composition is 0.3 mm to 2.5 cm, respectively. An electrolytic cell having a member for supplying an aqueous electrolyte solution to an electrolytic cell, a member for passing current between an anode and a cathode, and a member for recovering electrolytic products from an electrolytic cell, comprising a plurality of laminated coating layers. 21. The electrolytic cell of claim 20, wherein the substrate is composed of a hydrophobic binder material which is polytetrafluoroethylene and a catalyst selected from the group consisting of smoking and carbon black, silver and platinum. 22. The electrolytic cell of claim 21, wherein the catalyst is a mixture of carbon black and a oxoxide decomposition catalyst. ※ Note: The disclosure is based on the initial application.