Electrochemical cell
AssigneeNGK Insulators, Ltd.
InventorsShinji Fujisaki, Takashi Ryu, Makoto Ohmori
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Abstract
The electrochemical cell has an anode, a cathode, and a solid electrolyte layer. The cathode contains a perovskite oxide expressed by the general formula ABO3 and includes at least one of Sr and La at the A site as a main component. The solid electrolyte layer is disposed between the anode and the cathode. The cathode includes a solid electrolyte layer-side region within 3 μm from a surface of the solid electrolyte layer side. The solid electrolyte layer-side region includes a main phase which is configured by the perovskite oxide and a second phase which is configured by Co3O4 and (Co, Fe)3O4. An occupied surface area ratio of the second phase in a cross section of the solid electrolyte layer-side region is less than or equal to 10.5%.
Claims5
An electrochemical cell comprising:
- an anode,
- a cathode containing a perovskite oxide expressed by the general formula ABO3 and including at least one of Sr and La at the A site as a main component, and
- a solid electrolyte layer disposed between the anode and the cathode,
- the cathode including a solid electrolyte layer-side region within 3 μm from a surface of the solid electrolyte layer side, the solid electrolyte layer-side region including a main phase which is configured by the perovskite oxide and a second phase which is configured by Co3O4 and (Co, Fe)3O4,
- an occupied surface area ratio of the second phase in a cross section of the solid electrolyte layer-side region being less than or equal to 10.5%, and
- an occupied surface area ratio of (Co, Fe)3O4 in a cross section of the solid electrolyte layer-side region is greater than an occupied surface area ratio of Co3O4.
Dependencies are inferred from the claim text.