ELECTROCHEMICAL REACTION UNIT

• Main Authors: SUZUKI SHINSUKE, HOTTA NOBUYUKI, KAKINUMA YASUO, SHIMAZU MEGUMI, SATO YOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 13.06.2023
• Subjects: APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTIONOF COMPOUNDS OR NON-METALS; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To inhibit the scattering of Mn contained in an interconnector into a fuel chamber.SOLUTION: A fuel cell stack includes: an electrochemical reaction single cell that includes an electrolyte layer containing a solid oxide, and an air electrode and a fuel electrode facing each other in a first direction with the electrolyte layer sandwiched therebetween; and a Mn-containing interconnector that is located on the opposite side of the air electrode in the first direction with respect to the fuel electrode and that defines a fuel chamber facing the fuel electrode. The interconnector has: a reaction area facing part located in an area where the electrolyte layer, the air electrode and the fuel electrode are overlapped in a first directional view; and a reaction area non-facing part that is not included in the reaction area facing part. The fuel cell stack further includes a specific member that is in contact with the reaction area facing part and that contains a specific element forming a compound with Mn, the specific member at least partially facing the fuel chamber. The specific member is located only in an interconnector side portion of the fuel chamber.SELECTED DRAWING: Figure 7 【課題】インターコネクタに含まれるＭｎが燃料室に飛散することを抑制する。【解決手段】燃料電池スタックは、固体酸化物を含む電解質層と、電解質層を挟んで第１の方向に互いに対向する空気極および燃料極と、を含む電気化学反応単セルと、燃料極に対して第１の方向の空気極とは反対側に位置するインターコネクタであって、燃料極が面する燃料室を画定し、かつ、Ｍｎを含むインターコネクタと、を備え、インターコネクタは、第１の方向視において電解質層と空気極と燃料極とが重なっている領域に位置する反応領域対向部と、反応領域対向部に含まれない反応領域非対向部と、を有する、燃料電池スタックにおいて、反応領域対向部に接する特定部材であって、Ｍｎと化合物を形成する特定元素を含み、少なくとも一部が燃料室に面する特定部材を備え、特定部材は、燃料室のインターコネクタ側部分のみに位置している。【選択図】図７