CATALYST LAYER OF FUEL BATTERY AND POLYMER ELECTROLYTE-ELECTRODE ASSEMBLY

• Main Authors: AKATSUKA TAKUYA, GEMBA MIHO, ENDO NORIAKI
• Format: Patent
• Language: English; Japanese
• Published: 11.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a catalyst layer for a high-efficiency fuel battery, in which a proton transfer supplied to a catalyst carrier is improved.SOLUTION: A catalyst layer comprises: a catalyst; a conductive catalyst carrier that carries the catalyst in a fine hole internal part; and a proton conductivity ionomer that coats the catalyst carrier. Since a crystallized level of a front surface of the catalyst carrier is 58% or more, a contact area between the ionomer and the catalyst carrier front surface is reduced, a coating thickness of the ionomer coated to the front surface of the catalyst carrier is increased, both of the catalyst carriers with an interval is easily contacted via the ionomer, and the contact area contacted via the ionomer becomes larger. Therefore, a proton movement amount supplied to the catalyst carrier can be improved.SELECTED DRAWING: Figure 8 【課題】本開示は、触媒担体へ供給するプロトン移動量を向上した高効率な燃料電池用の触媒層を提供する。【解決手段】本開示における触媒層は、触媒と、細孔内部に触媒を担持した導電性の触媒担体と、触媒担体を被覆するプロトン伝導性のアイオノマと、を備え、触媒担体は、表面の結晶化度が５８％以上であるので、アイオノマと触媒担体表面との接触面積が減少し、触媒担体の表面に被覆したアイオノマの被覆厚が増加し、間隔を空けた触媒担体同士が、アイオノマを介して接触し易くなったり、アイオノマを介して接触する接触面積が大きくなったりして、触媒担体へ供給するプロトン移動量を向上することができる。【選択図】図８