Solid Oxide Fuel Electrode Alloy Oxides Against Nickel Aggregation

The patent applies composite materials by combining nickel with heterogeneous metals (such as tin, indium, bismuth, or gallium) to form a nickel-based alloy. This composite structure maintains the high catalytic activity of nickel while the heterogeneous metal components prevent nickel aggregation and reduce thermal expansion/contraction, thereby resolving the contradiction between catalyst activity and structural stability under high-temperature operating conditions.

The patent applies local quality by creating a non-uniform distribution of heterogeneous metals within the nickel structure. The heterogeneous metals are distributed at specific locations (such as grain boundaries or surface regions) to locally reinforce the structure and prevent aggregation, while maintaining nickel's catalytic properties in other regions. This localized modification resolves the contradiction by providing structural stability where needed without compromising overall catalyst activity.

The patent uses composite materials by forming a nickel-based alloy with heterogeneous metals that are evenly distributed throughout the solid oxide matrix. This composite approach allows nickel to be widely spread for high three-phase boundary density and performance, while the heterogeneous metal components act as structural stabilizers that prevent aggregation and maintain cell structure durability under high-temperature operating conditions.

The patent applies parameter changes by modifying the chemical composition parameters of the fuel electrode material. By changing the composition from pure nickel to a nickel-based alloy with controlled amounts of heterogeneous metals (e.g., 0.1-10 at% Sn, In, Bi, or Ga), the material achieves both high dispersion for performance and aggregation resistance for durability, resolving the contradiction between productivity and reliability.