ELECTROCHEMICAL REACTION DEVICE

• Main Authors: KAKINUMA YASUO, TAKEUCHI MIZUE, SHIMAZU MEGUMI, SATO YOSHIAKI
• Format: Patent
• Language: English; Japanese
• Published: 13.10.2023
• 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 improve the power generation performance of an electrochemical reaction device by suppressing Mn poisoning of an electrolyte layer.SOLUTION: An electrochemical reaction device includes a flow path defining member that defines a specific gas flow path for exchanging gas with a fuel electrode. The flow path defining member contains Mn and Cr, and at least a portion of the portion defining the specific gas flow path is an oxide film. After conducting an accelerated heating test for the flow path defining member at 1000°C for 100 hours in a hydrogen atmosphere containing 20% water vapor, and when analyzed using an electron beam microanalyzer, the average value Ca of the Mn concentration in the cross section along the thickness direction of the oxide film is 21.0 mass% or less.SELECTED DRAWING: Figure 8 【課題】電解質層のＭｎ被毒を抑制することにより、電気化学反応装置の発電性能を向上させる。【解決手段】電気化学反応装置は、燃料極との間でガスのやり取りを行う特定ガス流路を画定する流路画定部材を備える。流路画定部材は、ＭｎおよびＣｒを含み、かつ、特定ガス流路を画定する部分の少なくとも一部は酸化被膜である。流路画定部材について、２０％水蒸気を含む水素雰囲気下において１０００℃で１００時間の加速加熱試験をした上で、電子線マイクロアナライザにより分析をした場合の酸化被膜の厚み方向に沿った断面におけるＭｎ濃度の平均値Ｃａは２１．０ｍａｓｓ％以下である。【選択図】図８