Solid oxide fuel cell based on semiconductor junction effect and preparation method of solid oxide fuel cell

Abstract

The invention relates to a solid oxide fuel cell based on a semiconductor junction effect and a preparation method of the solid oxide fuel cell. The solid oxide fuel cell structurally comprises a cathode, an anode and current collectors, wherein the current collectors are arranged on outer sides of the cathode and the anode. The solid oxide fuel cell is characterized in that the cathode is a proton / oxygen ion conductor material with properties of an n-type semiconductor, the anode is a proton / oxygen ion conductor material with properties of a p-type semiconductor, and a current carrier depletion layer is at the interface between the cathode and the anode. The solid oxide fuel cell is not equipped with a solid electrolyte layer, so that the ohmic loss caused by electrolyte is decreased to zero; and meanwhile, the solid oxide fuel cell further has the advantages of low interface transportation loss, production cost and working temperature and the like.

Description

technical field [0001] The invention belongs to the field of fuel cells, in particular to a p-n junction solid oxide fuel cell. Background technique [0002] Fuel cell technology is considered to be one of the most promising clean energy technologies in the 21st century. Usually fuel cells are divided into 5 categories: proton exchange membrane fuel cells, solid oxide fuel cells, molten carbonate fuel cells, phosphoric acid fuel cells and alkaline fuel cells. But in fact, the focus of current research is mainly on proton exchange membrane fuel cells and solid oxide fuel cells. Proton exchange membrane fuel cells have the advantages of low operating temperature, convenient maintenance, and fast start-up speed. There have been many successful demonstration projects, but they are still far from meeting the requirements of commercial applications. First of all, the use of precious metal platinum leads to high product prices on the one hand, and on the other hand has extremely ...

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Problems solved by technology

Although this structure ensures that the fuel cell can realize the conversion of chemical energy to electrical energy, there are some inherent defects in the structure.

The three-layer structure makes the preparation process of the fuel cell complex and brings relatively high process costs; the three-layer structure must contain two interfaces: the electrolyte anode interface and the electrolyte cathode interface, these two interfaces will cause a large electrical interface transport Loss, resulting in fuel cell power and efficiency loss; interfaces will diffuse or even react with each other, which directly affects the operating life of the battery; the intermediate layer electrolyte will bring a lot of ohmic loss, which is why solid oxide fuel cells need to operate at high temperatures The main reason for the operation below

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