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Treatment method of SOFC (solid oxide fuel cell) multi-layer co-fired material

A treatment method and co-firing technology, applied in fuel cells, electrical components, electrochemical generators, etc., can solve the problems of easy delamination, cracking and difficulty in meeting life requirements of batteries

Pending Publication Date: 2022-06-21
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, because solid oxide fuel cells need to operate at high temperatures, the cells are prone to delamination and cracking, and it is difficult to meet the life requirements of their commercial applications.

Method used

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  • Treatment method of SOFC (solid oxide fuel cell) multi-layer co-fired material
  • Treatment method of SOFC (solid oxide fuel cell) multi-layer co-fired material
  • Treatment method of SOFC (solid oxide fuel cell) multi-layer co-fired material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] This example deals with a multi-layer co-fired material for a solid oxide fuel cell, such as image 3 shown, the material is La 1-x Sr x Co 1-y Fe y O 3 (LSCF) as the cathode, YSZ and GDC as the electrolyte, and Ni-YSZ as the anode.

[0030] The LSCF and Ni-YSZ were coated with platinum electrodes, and the electrodes were sintered as specified for different platinum pastes. The combination of electrode and material is good. Multilayer co-fired ceramics with platinum electrodes on the surface are connected in series in a circuit and placed in a sintering furnace.

[0031] The sintering furnace was heated to 800°C and kept at a constant temperature for 10 minutes. An electric field of 100 V / cm was applied, and a voltage of 5 V was applied assuming that the thickness of the multilayer co-fired ceramic was 0.5 mm. After the electric field is applied, a flash-burn phenomenon occurs, the current increases rapidly, and the power supply automatically switches to the cur...

Embodiment 2

[0033] This example deals with a multi-layer co-fired material for a solid oxide fuel cell, such as Figure 5 shown, the multilayer material is BaCo 0.4 Fe 0.4 Zr 0.1 Y 0.1 O 3-δ (BCFZY) is the cathode, BaZr 0.1 Ce 0.7 Y 0.1 Yb 0.1 O 3–δ (BZCYYb) is the electrolyte and Ni-BZCYYb is the anode. Coat both ends with platinum electrodes and sinter the electrodes as specified for different platinum pastes. The electrode and the material are combined well. Multilayer co-fired ceramics with platinum electrodes on the surface are connected in series in a circuit and placed in a sintering furnace. Platinum electrodes can be omitted.

[0034] The sintering furnace was heated to 900°C and kept at a constant temperature for 10 minutes. An electric field of 120V / cm is applied, and if the thickness of the multilayer co-fired ceramic is 0.5mm, a voltage of 6V is applied. After the electric field is applied, a flash-burn phenomenon occurs, the current increases rapidly, and the p...

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Abstract

The embodiment of the invention discloses a treatment method of an SOFC (Solid Oxide Fuel Cell) multi-layer co-fired material, which comprises the following steps: connecting the SOFC multi-layer co-fired material in series in a circuit, placing in a sintering furnace, and heating to 400-1400 DEG C in an inert atmosphere; and applying an electric field to the SOFC multi-layer co-fired material, turning off a power supply when a flash burning phenomenon occurs, repeating for multiple times, and then reducing the furnace temperature to room temperature. According to the embodiment of the invention, the electric field is repeatedly applied to the multi-layer structure, so that the material and the structure are repeatedly subjected to the second stage (abrupt change stage) of flash burning, atoms / ions on the interface are promoted to be quickly diffused, the bonding strength of the interface is greatly improved, the stress of the interface is relieved, and the spallation / cracking of the SOFC in the use process is reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of solid oxide fuel cells, in particular to a method for processing SOFC multilayer co-fired materials. Background technique [0002] Solid oxide fuel cell (SOFC) is an efficient and clean energy system that directly converts chemical energy in fossil fuels such as hydrogen, coal, oil, natural gas and other hydrocarbons into electrical energy. It has the advantages of no pollution, low noise, strong modular scalability, and high power density. [0003] However, since solid oxide fuel cells need to operate at high temperatures, the cells are prone to delamination and cracking, and it is difficult to meet the life requirements of their commercial applications. SUMMARY OF THE INVENTION [0004] Embodiments of the present invention provide a method for treating SOFC multi-layer co-fired materials, and the technical problem to be solved is to strengthen the bonding strength of the mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1246H01M8/1253H01M8/126
CPCH01M8/1246H01M8/1253H01M8/126H01M8/1266H01M2008/1293
Inventor 高燕严资林焦震钧
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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