Solid oxide fuel cell and preparation method thereof

A solid oxide, fuel cell technology, applied in the field of electrochemistry, can solve the problem of high ionic conductivity electrode reaction kinetics catalysis ability, easy to produce second equal

Inactive Publication Date: 2010-03-03
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, a single material has not been able to combine high ionic conductivity, outstanding electrode reaction kinetics, and catalytic capabilities.
[0004] The widely used electrolyte material is yttrium-stabilized ZrO 2 , doped CeO 2 or doped LaGaO 3 , where the doubly doped LaGaO 3 It has high ionic conductivity, but it is easy to generate a second phase, so the stability needs to be improved

Method used

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  • Solid oxide fuel cell and preparation method thereof
  • Solid oxide fuel cell and preparation method thereof
  • Solid oxide fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Fabrication of solid oxide fuel cells

[0057] 1) Ce 0.8 SM 0.2 o 1.9 Preparation of Electrolyte Powder

[0058] By preparing the solution of the nitrate of the metal ion according to the stoichiometric ratio (Ce:Sm mole is 4:1), and then adding a certain amount of glycine (NH 2 -CH 2 -COOH) makes the amount of glycine and nitrate ions in the solution satisfy the molar ratio of 1:2. The prepared solution is evaporated to dryness by heating until it spontaneously ignites to generate oxide powder, and is calcined at 600°C for 2 hours to remove possible residual carbon impurities to form a cubic crystal phase of Ce 0.8 SM 0.2 o 1.9 Powder.

[0059] 2) Flower-shaped nano-CeO 2 preparation of

[0060] By dissolving 0.005 mole of metal ion Ce nitrate, 0.01 mole of glucose, and 0.015 mole of acrylamide in 80 milliliters of deionized water, adding 3.2 milliliters of 25% by weight ammonia water under stirring to form a gel, and continuing to stir for 5 After 1 hour, tra...

Embodiment 2

[0066] 10% Sm-doped flower-like cerium-based solid oxide fuel cells

[0067] The preparation and test conditions of the battery are similar to those in Example 1, except that the flower-shaped nano-CeO 2 During preparation, the nitrate of Sm is also added to the mixed solution composed of nitrate of Ce, glucose and acrylamide, and the metering of adding Sm satisfies the following relationship: the molar ratio of Ce to Sm is 9:1, and the total amount of metal ions is kept No change, still 0.005mol. The molecular formula of the cerium-based material to obtain the anode and cathode is Ce 0.9 SM 0.1 o 1.95 .

[0068] When using pure H 2 As fuel, under the test condition of 600°C, the maximum output power density of the battery is about 55mW / cm 2 , the resistance of the full battery is about 2.5Ω.cm 2 . Compared with Example 1, the Sm-doped flower-like material has higher oxygen ion conductivity, which improves the performance of the battery.

Embodiment 3

[0070] 20% Sm-doped flower-like cerium-based material solid oxide fuel cell

[0071] The preparation and test conditions of the battery are similar to those in Example 2, except that the doping ratio of the flower-shaped cerium-based material Sm is 20%. When using pure H 2 As a fuel, under the test condition of 600°C, the maximum output power density of the battery is about 59mW / cm 2 , the resistance of the full battery is about 2.8Ω.cm 2 .

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Abstract

The invention provides a solid oxide fuel cell. The anode layer, cathode layer and electrolyte layer of the cell contain cerium-based materials; the cerium-based materials of the anode layer and the cathode layer are cerium-based materials with a flower-shaped structure; and the anode layer and the cathode layer also carry catalysts and/or conductive additives. The invention also provides a preparation method of the cell. The solid oxide fuel cell has improved performance and service life and improves the acoustic performance of electrodes, thereby improving the overall reaction activity of the electrodes. The cell can use medium-low temperature solid oxide fuels of a plurality of fuels including hydrocarbons.

Description

technical field [0001] The invention relates to a solid oxide fuel cell and a preparation method of the cell, belonging to the field of electrochemistry. Background technique [0002] Solid oxide fuel cell (SOFC for short) belongs to the third-generation fuel cell, which is an all-solid-state chemical power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. It is generally considered to be a fuel cell that will be widely used in the future like the proton exchange membrane fuel cell. [0003] Solid oxide fuel cells (SOFC) can directly use various carbon-based fuels from a wide range of sources and low prices; fuels are easy to store and transport, and can be suitable for large-scale power generation, distributed power sources and small and medium-sized mobile power sources. In the past 70 years, the research and development of high-tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M8/02H01M4/86H01M4/90H01M4/92H01M8/126
CPCY02E60/521Y02E60/50
Inventor 肖国亮李泓陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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