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

A solid oxide and fuel cell technology, applied in the direction of solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve problems such as complex process, electrical interface transportation loss, and impact on battery operating life, so as to simplify the preparation process and reduce the Production cost, effect of reducing interface transport loss

Inactive Publication Date: 2016-05-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Embodiment 1

[0029] The preparation of embodiment 1 fuel cell

[0030] Taking TDC+Co and LNCA as an example to illustrate the preparation method of this battery.

[0031] Weigh 0.2g TDC+Co sample and 0.2g LNCA; prepare two foamed nickel discs with a diameter of 12.8 mm and a thickness of 1 mm; fill them in the order of foamed nickel discs, TDC+Co samples, LNCA, and foamed nickel discs In a stainless steel mold with a diameter of 13mm, ensure that the sample is evenly spread; dry press molding under a pressure of 200-300MPa, and a finished fuel cell can be obtained.

[0032] Please refer to figure 1 , figure 1 Middle is the cross-sectional electron microscope diagram of the solid oxide fuel cell based on the semiconductor junction effect of the present invention. In the figure, it can be clearly seen that the cell is composed of two layers, the loose layer (ie, the left side) is the LNCA layer, and the dense layer is the LNCA layer. TDC+Co layer, the interface between the two layers is c...

Embodiment 2

[0034] Performance test of embodiment 2 fuel cell

[0035]The single cell obtained in Example 1 is packaged on an alumina tube, and in the temperature range of 400-580 degrees Celsius, the fuel gas (such as hydrogen) and air are respectively passed through the LNCA side and the TDC+Co side of the battery to obtain a stable power output. The specific working principle of the battery is as follows: LNCA is the positive electrode material of the lithium battery. In the lithium battery, lithium ions can move freely in the layered structure of LNCA, thereby ensuring the free migration of lithium ions and realizing the charging and discharging process of the lithium battery; In fuel cells, nickel and cobalt components have very good catalytic activity for fuel molecules (such as hydrogen), and the protons produced by catalysis are smaller than lithium ions, so the protons produced can also move freely in the layered structure of LNCA , so as to realize the fuel cell anode half reac...

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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 ...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/90H01M8/12
CPCH01M4/8647H01M4/9033H01M8/12H01M2008/1293Y02E60/50Y02P70/50
Inventor 王广军龙国徽吴香英纪媛徐付占孟元靖梁旭
Owner JILIN UNIV
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