摘要:
Disclosed is a membrane-electrode structure for a solid polymer fuel cell comprising a pair of electrode catalyst layers and a polyeletrolyte membrane sandwiched between the electrode catalyst layers, wherein the electrode catalyst layers contain polyarylene having a sulfonic acid group, said polyarylene comprising a recurring unit represented by the following formula (A) and a recurring unit represented by the following formula (B);
摘要:
A process of producing an electrode paste having excellent storage stability and capable of forming a catalyst layer that has a sufficient pore volume for high generating performance, and an electrode paste composition having such properties are disclosed. The process comprises mixing and agitating carbon black supporting a catalyst metal, a polymer electrolyte, an organic solvent and at least either carbon fiber or water thereby to finely disperse the carbon black to a predetermined mean particle diameter of particles dispersed in the mixed solution, and admixing a dispersant to the mixed solution and agitating the resultant mixture to obtain an electrode paste in which particles having a predetermined mean particle diameter are uniformly dispersed.
摘要:
Disclosed is a membrane-electrode structure for a solid polymer fuel cell comprising a pair of electrode catalyst layers and a polyeletrolyte membrane sandwiched between the electrode catalyst layers, wherein the electrode catalyst layers contain polyarylene having a sulfonic acid group, said polyarylene comprising a recurring unit represented by the following formula (A) and a recurring unit represented by the following formula (B);
摘要:
A process of producing an electrode paste having excellent storage stability and capable of forming a catalyst layer that has a sufficient pore volume for high generating performance, and an electrode paste composition having such properties are disclosed. The process comprises mixing and agitating carbon black supporting a catalyst metal, a polymer electrolyte, an organic solvent and at least either carbon fiber or water thereby to finely disperse the carbon black to a predetermined mean particle diameter of particles dispersed in the mixed solution, and admixing a dispersant to the mixed solution and agitating the resultant mixture to obtain an electrode paste in which particles having a predetermined mean particle diameter are uniformly dispersed.
摘要:
A polymer which has a flexible structure in its main chain and thus exhibits a high toughness and can difficultly be deteriorated in its mechanical properties and thermal properties even when sulfonated, a sulfonic acid group-containing polymer obtained by the sulfonation of the polymer, and a proton-conductive membrane having an excellent mechanical strength and durability made of the sulfonic acid group-containing polymer. A novel halogenated aromatic compound represented by the following general formula (1m) is provided: wherein A independently represents an electron-withdrawing group; B independently represents an electron-donating atom or group; X represents a chlorine atom, iodine atom or bromine atom; R to R may be the same or different and each represent a hydrogen atom, fluorine atom or alkyl group; and n represents an integer of 2 or more.
摘要:
A diyne-containing (co)polymer which is soluble in organic solvents, has excellent processability, and gives a cured coating film excellent in heat resistance, solvent resistance, low-dielectric characteristics, and mechanical strength; processes for producing the same; and a cured film. The diyne-containing (co)polymer contains at least 10 mol% repeating units represented by the following formula (1) and has a weight-average molecular weight of from 500 to 1,000,000: wherein Y represents a specific bivalent organic group; Ar represents a bivalent organic group; and n represents 0 or 1.
摘要:
A membrane-electrode assembly for direct methanol type fuel cell and a proton conductive membrane for direct methanol type fuel cell are disclosed. The membrane-electrode assembly comprises a negative electrode and a positive electrode assembled via a proton conductive membrane, the negative electrode being provided with a negative electrode-side separator having a mechanism for feeding a methanol aqueous solution as a fuel, the positive electrode being provided with a positive electrode-side separator having a mechanism for feeding an oxidizing agent gas, and the proton conductive membrane comprising a polymer containing 0.05-99.95 mol% of a repeating constitutional unit represented by the formula (A), and 0.05-99.95 mol% of a repeating constitutional unit represented by the formula (B).
摘要:
A polyarylene copolymer which comprises (A) from 60 to 3 mol% aromatic compound units having a main chain containing one or more electron-withdrawing groups therein and (B) from 40 to 97 mol% aromatic compound units having a main chain containing no electron-withdrawing groups therein (provided that (A)+(B) = 100 mol%), and a proton-conductive membrane comprising the polyarylene copolymer having sulfonic acid groups.
摘要:
Electronic parts and a process for manufacturing the electronic parts are provided. The electronic parts comprise an electric insulating material exhibiting a high heat resistance and low dielectric constant as a structural component. The electric insulating material is formed of a polyimide containing a recurring unit represented by the following general formula (1).