Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of an electrode for a solid polymer fuel cell capable of reducing carrying amount of a metal catalyst and capable of suppressing voltage drop in a large current region. SOLUTION: This is the manufacturing method of an electrode for solid polymer fuel cell equipped with a conductive porous substrate, carbon fiber arranged on the conductive porous substrate, and a metal catalyst carried on the carbon fiber, and comprises (i) a process to apply a water repellency treatment on one of the surfaces of the conductive porous substrate, (ii) a process to produce a fibril-like polymer by electrolytic oxidation polymerization of a compound having an aromatic ring on the other surface of the conductive porous substrate, (iii) a process to produce carbon fiber on the conductive porous substrate by calcining the fibril-like polymer, and (iv) a process to have the metal catalyst carried on the carbon fiber. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing carbon fiber that is small in fiber diameter, large in surface area, and used for a catalyst layer of a solid polymer-type fuel cell, enhances the performance of the solid polymer-type fuel cell through improving the efficiency of carrying the catalyst. SOLUTION: The method includes the step A of forming a fibrillar polymer by electrolytic polymerization of an aromatic ring-containing compound and a step B of forming the objective carbon fiber by baking the fibrillar polymer. In this method, in the step A, pulsed electric current is applied wherein the maximum level of the electric current is positive, while the minimum level is negative. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a fibrous carbon, which does not require a spinning process and an infusibilization process and giving a fibrous carbon having excellent electrical conductivity, and especially a diameter of several ten to several hundred nanometers and suitable as an electrode material of a solid-polymer fuel cell and a filler for various resin products. SOLUTION: The method for producing a fibrous carbon includes a step (A) to form a fibrous polymer structure by the electrolytic polymerization of a compound having an aromatic ring on a conductive substrate and a step (B1) to form a fibrous carbon structure by firing the fibrous polymer structure and recover the fibrous carbon by separating the produced fibrous carbon structure from the conductive substrate or a step (B2) to recover the fibrous polymer by separating the fibrous polymer structure from the conductive substrate and obtain the fibrous carbon by firing the fibrous polymer. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an operating method of a solid polymer fuel cell capable of shortening the preliminary operating period. SOLUTION: This is the operating method of the solid polymer fuel cell, having a solid polymer electrolyte membrane 3, an anode catalyst layer 5A arranged on one side of the solid polymer electrolyte membrane 3, and a cathode catalyst layer 5B arranged on another side of the solid polymer electrolyte membrane 3. As a preliminary operation, power generation is carried out, by supplying oxidant gas to the anode catalyst layer 5A and supplying hydrogen gas to the cathode catalyst layer, and then, in the normal operation, power generation is carried out, by supplying fuel gas or liquid to the anode catalyst layer 5A and supplying oxidizer gas to the cathode catalyst layer 5B. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electrode for a solid polymer fuel cell capable of shortening a preliminary operating period, and to provide its manufacturing method. SOLUTION: This is a manufacturing method of an electrode for solid polymer fuel cell, having a catalyst carrier and a metal catalyst carried on the catalyst carrier, and includes a process in which the metal catalyst is carried on the catalyst carrier and a process, in which the catalyst carrier carrying the metal catalyst is applied an oxidation reduction treatment electrochemically in an acid water solution. The electrode for the solid polymer fuel cell manufactured by this method is also provided. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of an electrode for a solid polymer fuel cell capable of sharply improving power generation efficiency of the solid polymer fuel cell. SOLUTION: The electrode for the solid polymer fuel cell is manufactured by generating fibrous polymer on a porous supporting body by oxidizing and polymerizing a compound having aromatic ring on the porous supporting body, generating carbon fiber on the porous supporting body by baking the fibrous polymer, and by making the carbon fiber carry metal by applying electric plating on the carbon fiber. On the electric plating, current is impressed in pulse-form, and duty ratio expressed by formula (1): duty ratio=t 1 /(t 1 +t 2 )×100 [in formula, t 1 denotes current impressing period (second), and t 2 denotes suspension period] is turned into 2 to 20%. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a carbon material capable of controlling pore characteristics and a carbon material manufactured by such method. SOLUTION: The method for manufacturing the carbon material including (i) a process of subjecting a compound having an aromatic ring in the presence of anion to oxidation polymerization or preferably electrolytic oxidation polymerization to generate a polymer, (ii) a process of removing the anion from the obtained polymer, and (iii) a process of firing the polymer from which the anion is removed, more preferably firing the polymer in a non-oxidizing atmosphere to generate the carbon material, and the carbon material manufactured by such method are provided. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition which can give heat-radiating sheets maintaining heat-radiating properties and flame retardancy and simultaneously having sufficient strengths, and to provide the heat-radiating sheet comprising the composition. SOLUTION: This thermoplastic elastomer composition comprising a thermoplastic elastomer, a heat-conductive filler and a flame retardant is characterized by containing a flame-retardant whisker as at least one part of the flame retardant. And the heat-radiating sheet comprises the composition.
Abstract:
PROBLEM TO BE SOLVED: To provide a gasket for preventing the generation of gas which contaminates a magnetic disk or the like in use of electronic equipment without installing a mechanism for degasing in an electronic equipment body. SOLUTION: In the gasket fixed to a cover or a frame and integrated with the cover or the frame, after the gasket is molded in the specified shape, gas contained in the gasket is removed.
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition which can be directly bonded to a metal by injection molding without using an adhesive and has a good adhesiveness. SOLUTION: This composition comprises (a) 100 pts.wt. thermoplastic styrene elastomer comprising a block copolymer, (b) 1-15 pts.wt. maleic anhydride- grafted polyolefin, and 30-170 pts.wt. paraffin oil.