Electrode, electrolytic capacitor, and method for manufacturing those

An electrode comprising:

• a core portion including a first metal;
• and
• a porous portion disposed in contact with the core portion,
• wherein:
• the porous portion includes:
• a porous body integrated with the core portion, the porous body including the first metal;
• a first dielectric layer covering at least a part of a surface of the porous body;
• and
• a second dielectric layer covering at least a part of the first dielectric layer,
• the first dielectric layer includes oxide of the first metal,
• the second dielectric layer includes oxide of a second metal, the second metal being different from the first metal, and
• a dynamic contact angle of water in the porous portion is less than or equal to 60°.

An electrode manufacturing method comprising the steps of:

• preparing a core portion including a first metal, and a porous body integrated with the core portion, the porous body including the first metal;
• forming a first dielectric layer including oxide of the first metal to cover at least a part of a surface of the porous body by performing anodization of the porous body;
• and
• forming a second dielectric layer including oxide of a second metal to cover at least a part of a surface of the first dielectric layer, the second metal being different from the first metal.