FUEL BATTERY

• Main Authors: NAKANE KAZUYOSHI, MIZUSHITA YOSHINORI, TASHIRO KEISUKE, TAKEI RIKI, HIRAMITSU YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 21.06.2018
• 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 a fuel battery that can equalize water distribution inside the fuel battery.SOLUTION: A fuel battery includes a membrane/electrode assembly 10 including an electrolyte membrane 11 and a catalyst layer 12 and a gas diffusion layer 13 arranged in order on both surfaces of the electrolyte membrane 11 and a pair of separators 20 that sandwich the membrane/electrode assembly 10, and the separator 20 includes a flow path 20a through which reaction gas flows along the gas diffusion layer 13, and the catalyst layer 12 includes a first catalyst layer 12a disposed to face the flow path 20a and a second catalyst layer 12b disposed to face a rib 20b that forms the wall surface of the flow path 20a, and a porosity of the second catalyst layer 12b is larger than that of the first catalyst layer 12a.SELECTED DRAWING: Figure 1 【課題】燃料電池内部の水分布を均一化することを可能とした燃料電池を提供する。【解決手段】電解質膜１１ならびに電解質膜１１の両面にそれぞれ順に配置された触媒層１２およびガス拡散層１３を有する膜／電極接合体１０と、膜／電極接合体１０を挟持する一対のセパレータ２０とを備え、セパレータ２０は、ガス拡散層１３に沿って反応ガスを流通させる流路２０ａを有し、触媒層１２は、流路２０ａに対向して配置される第一の触媒層１２ａと、流路２０ａの壁面を形成するリブ２０ｂに対向して配置される第二の触媒層１２ｂとを有し、第二の触媒層１２ｂを、第一の触媒層１２ａよりも空隙率が大きくなるようにした。【選択図】図１