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Intermediate temperature solid oxide fuel battery composite cathode and preparation method thereof

A solid oxide and fuel cell technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of unsuitable cathode materials, improve catalytic activity and electrochemical performance, increase mixed conductivity, and increase active area. Effect

Inactive Publication Date: 2012-07-04
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing cathode materials are not suitable for working under medium temperature conditions; and provide a composite cathode for a medium temperature solid oxide fuel cell and a preparation method thereof

Method used

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  • Intermediate temperature solid oxide fuel battery composite cathode and preparation method thereof
  • Intermediate temperature solid oxide fuel battery composite cathode and preparation method thereof
  • Intermediate temperature solid oxide fuel battery composite cathode and preparation method thereof

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specific Embodiment approach 1

[0008] Specific embodiment 1: In this embodiment, the composite cathode of the intermediate temperature solid oxide fuel cell is composed of 50% to 90% Ca 2 Fe 1.4 co 0.6 o 5 and 10% to 50% solid electrolyte, wherein the solid electrolyte is Ce 0.8 Gd 0.2 o 1.95 or Ce 0.8 SM 0.2 o 1.95 .

specific Embodiment approach 2

[0009] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the compound cathode of the intermediate temperature solid oxide fuel cell is composed of 60% to 80% Ca 2 Fe 1.4 co 0.6 o 5 And 20% to 40% solid electrolyte made. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0010] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the compound cathode of the intermediate temperature solid oxide fuel cell is composed of 70% Ca by weight percentage 2 Fe 1.4 co 0.6 o 5 and 30% solid electrolyte. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention discloses an intermediate temperature solid oxide fuel battery composite cathode and a preparation method thereof, and belongs to the field of chemical power solid oxide fuel battery materials. The invention solves the problem that the conventional cathode materials are not suitable for working under the condition of intermediate temperature. The composite cathode material is composed of Ca2Fe1.4Co0.6O5 and a solid dielectric which is Ce0.8Gd0.2O1.95 or Ce0.8Sm0.2O1.95. The method comprises the following steps of: 1, mixing the Ca2Fe1.4Co0.6O5 and the solid dielectric, adding terpilenol and uniformly mixing the three materials to obtain a mixed material; 2, coating the mixed material on the surface of the dielectric, and placing the dielectric in an oven for drying; and 3, sintering the dielectric to obtain the intermediate temperature solid oxide fuel battery composite cathode material on the surface of the dielectric. The cathode has the advantages of high electro-catalytic activity and low polarization resistance in the temperature range of 500 to 700 DEG C.

Description

technical field [0001] The invention belongs to the field of chemical power source solid oxide fuel cell materials. Background technique [0002] As a new type of energy conversion device, solid oxide fuel cell is attracting more and more attention from various countries because of its advantages of high efficiency and cleanliness. Traditional solid oxide fuel cells suffer from poor stability and short lifetime due to their high operating temperature (around 1000°C). The development of intermediate temperature solid oxide fuel cells has become one of the hot research directions. However, the catalytic activity of the electrode decreases rapidly with the decrease of the reaction temperature, and the polarization resistance increases. Traditional high temperature solid oxide battery cathode material La 1-x Sr x MnO 3 Due to its low electrical conductivity and catalytic activity below 800 °C, it is no longer suitable for intermediate temperature solid oxide fuel cells. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 李强赵辉夏天霍丽华高山
Owner HEILONGJIANG UNIV
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