METHOD FOR MANUFACTURING ELECTROLYTE MEMBRANE-ELECTRODE STRUCTURE

• Main Authors: MATSUMORI HIROSHI, FUKUMIZU TAKAO, ASANO YOICHI, YAMAWAKI TAKUMA
• Format: Patent
• Language: English; Japanese
• Published: 25.01.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide an electrolyte membrane-electrode structure which can suppress physical deformation of an electrolyte membrane even with a simple structure, and which enables the achievement of superior power generation characteristics.SOLUTION: An electrolyte membrane-electrode structure 12 is arranged by holding an electrolyte membrane 24 between and by an anode electrode 26 and a cathode electrode 28. In the anode electrode 26, a first porous layer 34 is interposed between a first electrode catalyst layer 30 and a first gas diffusion layer 32. In the cathode electrode 28, a second porous layer 42 is interposed between a second electrode catalyst layer 38 and a second gas diffusion layer 40. A first superposed body 35 including the first gas diffusion layer 32 with the first porous layer 34 superposed thereon is larger, in seepage pressure, than a second superposed body 43 including the second gas diffusion layer 40 with the second porous layer 42 superposed thereon. The seepage pressure of the first superposed body 35 is 25-120 kPa, and the seepage pressure of the second superposed body 43 is 5-25 kPa.SELECTED DRAWING: Figure 1 【課題】電解質膜の物理的な変形を簡易な構成で抑制可能であり、且つ優れた発電特性を得ることが可能な電解質膜・電極構造体を提供する。【解決手段】電解質膜・電極構造体１２は、電解質膜２４をアノード電極２６とカソード電極２８で挟持して構成される。アノード電極２６の第１電極触媒層３０及び第１ガス拡散層３２の間には、第１多孔質層３４が介在する。また、カソード電極２８の第２電極触媒層３８及び第２ガス拡散層４０の間には、第２多孔質層４２が介在する。第１ガス拡散層３２と第１多孔質層３４とを重畳した第１重畳体３５は、第２ガス拡散層４０と第２多孔質層４２とを重畳した第２重畳体４３に比して透水圧が大きく、且つ第１重畳体３５の透水圧は２５〜１２０ｋＰａであり、第２重畳体４３の透水圧は５〜２５ｋＰａである。【選択図】図１