ELECTROCHEMICAL ELEMENT, ELECTROCHEMICAL MODULE, ELECTROCHEMICAL DEVICE, ENERGY SYSTEM, SOLID OXIDE FUEL CELL, AND SOLID OXIDE ELECTROLYTIC CELL

• Main Authors: KUBOTA RYOMA, ONISHI HISAO, TSUDA YUJI, KURISU HIROKI, YODA MASAKAZU, KUNIMATSU MISATO, ECHIGO MITSUAKI
• Format: Patent
• Language: English; Japanese
• Published: 11.10.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRICITY; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

To provide an electrochemical element and the like, having high performance and durability by including a diffusion preventing layer which can suppress element diffusion from a metal support to an electrode layer and which also does not easily block gas diffusion.SOLUTION: An electrochemical element E includes: a gas-permeable metal support 1; a diffusion preventing layer 7 formed on the metal support 1; an electrode layer 2 formed on the diffusion preventing layer 7; an electrolyte layer 4 formed on the electrode layer 2; and a counter electrode layer 6 formed on the electrolyte layer 4. The diffusion preventing layer 7 includes a first diffusion preventing layer 7a having a first porosity, and a second diffusion preventing layer 7b having a second porosity higher than the first porosity.SELECTED DRAWING: Figure 1 【課題】金属支持体から電極層への元素拡散を抑制できかつ、ガスの拡散を阻害しにくい拡散防止層を備えることで高い性能と耐久性を有する電気化学素子等を提供することを目的とする。【解決手段】電気化学素子Ｅは、気体透過可能な金属支持体１と、金属支持体１の上に形成された拡散防止層７と、拡散防止層７の上に形成された電極層２と、電極層２の上に形成された電解質層４と、電解質層４の上に形成された対極電極層６と、を備え、拡散防止層７は、第１気孔率を有する第１拡散防止層７ａ及び第１気孔率よりも気孔率が高い第２気孔率を有する第２拡散防止層７ｂを含む。【選択図】図１