ELECTROCHEMICAL CELL

• Main Authors: YAMAGIWA KATSUYA, TAKEICHI TOSHINORI, MATSUO TOMOAKI, IGAI YOSHIHITO
• Format: Patent
• Language: English; Japanese
• Published: 10.03.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide an electrochemical cell that can improve durability.SOLUTION: A fuel electrode-supported electrochemical cell includes an electrolyte layer, a fuel electrode provided on one surface of the electrolyte layer, and an air electrode provided on the other surface of the electrolyte layer, and the fuel electrode includes an active layer in contact with the electrolyte layer, the active layer includes a first particle having ionic conductivity and a second particle having electron conductivity, and the first particle has electron conductivity under a fuel electrode atmosphere. In the second particle appearing in the cross section of the active layer, the area of the second particle having a circle equivalent diameter of 1/20 or less of the maximum value of the circle equivalent diameter of the second particle in the cross section is 0.1% or less of the area of the second particle in the cross section.SELECTED DRAWING: Figure 3 【課題】耐久性を向上できる電気化学セルを提供する。【解決手段】電気化学セルは、電気化学セルは、電解質層と、電解質層の一方の面に設けられた燃料極と、電解質層の他方の面に設けられた空気極と、を備え、燃料極は、電解質層に接する活性層を含み、活性層は、イオン伝導性を有する第１の粒子、及び、電子伝導性を有する第２の粒子を含み、第１の粒子は燃料極雰囲気下で電子伝導性も有する、燃料極支持型の電気化学セルである。活性層の断面に現出する第２の粒子は、断面における、第２の粒子の円相当径の最大値の１／２０以下の円相当径をもつ第２の粒子の面積が、断面における第２の粒子の面積の０．１％以下である。【選択図】図３