ANODE FOR SOLID OXIDE FUEL CELL AND SOLID OXIDE FUEL CELL SINGLE CELL

• Main Author: HITOMI TAKUMA
• Format: Patent
• Language: English; Japanese
• Published: 20.06.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a solid oxide fuel cell single cell capable of achieving high output and long life, and an anode for a solid oxide fuel cell that can realize the same.SOLUTION: An anode 1 includes a first porous region 11 and a second porous region 12. The first porous region 11 includes a large number of pores 110. The second porous region 12 is disposed in the first porous region 11 and includes a large number of pores 120 each having a larger diameter than those of the pores 110 in the first porous region 11. The anode 1 include a catalyst metal 13 that is a catalyst for the anode reaction, a sacrificial metal 14 that has a higher ionization tendency than the catalyst metal 13, and an oxygen ion conductive oxide 15. In the anode 1, the proportion of the sacrificial metal 14 existing in the second porous region 12 is larger than the proportion of the sacrificial metal 14 existing in the first porous region 11.SELECTED DRAWING: Figure 1 【課題】高出力化および高寿命化を図ることが可能な固体酸化物形燃料電池単セル、これを実現できる固体酸化物形燃料電池用アノードを提供する。【解決手段】アノード１は、第１多孔領域１１と、第２多孔領域１２とを有する。第１多孔領域１１は、気孔１１０を多数含む。第２多孔領域１２は、第１多孔領域１１内に配置されており、第１多孔領域１１の気孔１１０よりも孔径の大きな気孔１２０を多数含む。アノード１は、アノード反応の触媒となる触媒金属１３と、触媒金属１３よりもイオン化傾向が大きい犠牲金属１４と、酸素イオン伝導性酸化物１５とを含んで構成されている。アノード１において、第２多孔領域１２における犠牲金属１４の存在割合は、第１多孔領域１１における犠牲金属１４の存在割合よりも大きい。【選択図】図１