Fuel electrode doubling as support of solid oxide fuel cell and method of producing the same

A fuel electrode doubling as a support of a solid oxide fuel cell, comprising:

• a three-dimensional network structure formed of oxide coarse particles with an average particle diameter of 30 to 90 μm and a first sol containing first oxide fine particles with an average particle diameter of 0.1 μm or smaller dispersed therein, where the oxide coarse particles are connected to one another via an aggregate of the first oxide fine particles;
• electrode particles having a function as an electrode catalyst dispersed in gaps of the three-dimensional network structure;
• and
• an aggregate of second oxide fine particles that is formed of a second sol containing the second oxide fine particles with an average particle diameter of 0.1 μm or smaller dispersed therein and connects the electrode particles to a surface in the gap of the three-dimensional network structure,
• wherein the oxide coarse particles are connected to one another without the electrode particles.