Solid oxide fuel cell anode with high stability and high efficiency and method for manufacturing the same

A solid oxide fuel cell anode comprising:

• a porous permeable metal substrate;
• a diffusion barrier layer disposed over the porous permeable metal substrate;
• and
• a nano-composite film disposed over the diffusion barrier layer and having a plurality of metal nanoparticles, a plurality of metal oxide nanoparticles, and a plurality of nano gas pores that are connected to form a plurality of nano gas channels;, the sizes of the metal nanoparticles are larger than the sizes of the metal oxide nanoparticles, and the sizes of the metal nanoparticles are about 2 to 4 times of the sizes of the metal oxide nanoparticles;
• wherein the metal nanoparticles connect with one another to form a 3-dimensional (3D) electron conductive network while the metal oxide nanoparticles connect to form a 3D oxygen ion conductive network, the 3D electron conductive network and the 3D oxygen ion conductive network are interlaced or intermixed each other, the nano gas pores between the metal nanoparticles and the metal oxide nanoparticles are formed by hydrogen reduction, the size of the metal nanoparticles is smaller than 100 nm, the size of the metal oxide nanoparticles is smaller than 40 nm, and the size of the nano gas pores and the size of the nano gas channels are smaller than 100 nm, the diffusion barrier layer is made of a compound with perovskite structure selected from the group consisting of lanthanum strontium manganese chromite, lanthanum strontium manganese cobaltite, lanthanum strontium chromite, and lanthanum strontium cobaltite, the lanthanum strontium manganese chromite is La75Sr0.25Cr0.5Mn0.5.