CN114649554A - Method for processing SOFC multilayer co-fired material - Google Patents

Method for processing SOFC multilayer co-fired material Download PDF

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Publication number
CN114649554A
CN114649554A CN202210275913.9A CN202210275913A CN114649554A CN 114649554 A CN114649554 A CN 114649554A CN 202210275913 A CN202210275913 A CN 202210275913A CN 114649554 A CN114649554 A CN 114649554A
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sofc
multilayer
fired
electrolyte
anode
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高燕
严资林
焦震钧
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Shenzhen Graduate School Harbin Institute of Technology
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Shenzhen Graduate School Harbin Institute of Technology
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/12Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/124Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
    • H01M8/1246Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/12Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/124Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
    • H01M8/1246Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
    • H01M8/1253Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides the electrolyte containing zirconium oxide
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/12Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/124Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
    • H01M8/1246Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
    • H01M8/126Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides the electrolyte containing cerium oxide
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/12Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M8/124Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
    • H01M8/1246Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
    • H01M8/1266Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides the electrolyte containing bismuth oxide
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00Fuel cells; Manufacture thereof
    • H01M8/10Fuel cells with solid electrolytes
    • H01M8/12Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M2008/1293Fuel cells with solid oxide electrolytes

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)
  • Inert Electrodes (AREA)

Abstract

The embodiment of the invention discloses a method for processing SOFC multilayer co-fired material, which comprises the following steps: serially connecting SOFC multilayer co-fired materials in a circuit, placing the circuit in a sintering furnace, and heating to 400-1400 ℃ in an inert atmosphere; and applying an electric field to the SOFC multilayer co-fired material, turning off a power supply when a flash combustion phenomenon occurs, and cooling the SOFC multilayer co-fired material to room temperature after repeating for many times. According to the embodiment of the invention, the electric field is repeatedly applied to the multilayer structure, so that the material and the structure are repeatedly subjected to the second flash stage (mutation stage), atoms/ions on the interface are promoted to be rapidly diffused, the bonding strength of the interface is greatly improved, and the stress of the interface is relieved, so that the layer cracking/cracking of the SOFC in the use process is reduced.

Description

Method for processing SOFC multilayer co-fired material
Technical Field
The embodiment of the invention relates to the technical field of solid oxide fuel cells, in particular to a method for processing SOFC multilayer co-fired materials.
Background
A Solid Oxide Fuel Cell (SOFC) is a highly efficient and clean energy system that directly converts chemical energy in fossil fuels such as hydrogen, coal, petroleum, natural gas, and other hydrocarbons into electrical energy, and has the advantages of high energy conversion efficiency, cleanliness, no pollution, low noise, strong modular expandability, high power density, and the like.
However, since the solid oxide fuel cell needs to operate at high temperature, the cell is easily delaminated and cracked, and it is difficult to meet the service life requirement of its commercial application.
Disclosure of Invention
The embodiment of the invention provides a method for processing an SOFC (solid oxide fuel cell) multilayer co-fired material, aiming at solving the technical problems of strengthening the bonding strength of a multilayer interface of an SOFC and relieving the stress of the interface so as to reduce the problem of delamination/cracking of the SOFC in the use process.
A processing method of an SOFC multilayer co-fired material comprises the following steps:
serially connecting the SOFC multilayer co-fired material in a circuit, placing the circuit in a sintering furnace, and heating to 400-1400 ℃ in an inert atmosphere;
and applying an electric field to the SOFC multilayer co-fired material, turning off a power supply when a flash combustion phenomenon occurs, and cooling the SOFC multilayer co-fired material to room temperature after repeating for many times.
Further, as shown in fig. 1, the multi-layer co-fired anode-supported SOFC sequentially comprises: an anode support, an electrolyte, a cathode; or a multi-layer co-fired electrolyte supported SOFC material, which sequentially comprises an anode, an electrolyte support and a cathode; or the SOFC material supported by the multilayer co-fired cathode sequentially comprises: an anode, an electrolyte, a cathode support; or the SOFC material supported by the multilayer co-fired metal sequentially comprises: metal support, anode, electrolyte, cathode;
both ends of the SOFC multilayer material are coated with platinum electrodes and sintered, and an electric field is applied to the SOFC multilayer material with platinum electrodes. According to different support layers and different structures of the multi-layer co-fired SOFC, the upper layer and the lower layer of the outermost layer of the multi-layer co-fired SOFC are coated with platinum electrodes and sintered, and an electric field is applied to the SOFC coated with the platinum electrodes, as shown in a test chart in figure 2.
Further, still include: the cathode functional layer comprises La1-xSrxMnO3(LSM)、La1-xSrxCo1-yFeyO3(LSCF)、Sm0.5Sr0.5CoO3(SSC)、BaCo0.4Fe0.4Zr0.1Y0.1O3-δ(BCFZY) or Ba0.5Sr0.5Co0.8Fe0.2O3-δ(BSCF).
Further, the method also comprises the following steps: the electrolyte layer includes at least one of yttria-stabilized zirconia YSZ, scandia-stabilized zirconia ScSZ, doped ceria DCO, a bismuth oxide-based electrolyte material, or a perovskite-structured electrolyte.
Further, still include: the doped cerium oxide DCO includes: gadolinium oxide doped ceria GDC or samarium oxide doped ceria SDC.
Further, still include: the perovskite-structured electrolyte includes: lanthanum gallate LaGaO3And LaGaO doped with Sr, Mg, etc3(LSGM),BaZr0.1Ce0.7Y0.2O3-α(BZCY) or Yb doped BaZr0.1Ce0.7Y0.2O3-α
Further, still include: the anode functional layer comprises a nickel-based anode or a Ni-based anode doped with Co and Ru metals.
Further, still include: the nickel-based anode comprises Ni/YSZ, Ni/GDC, Ni/SDC or Ni/perovskite.
Further, the metal support comprises a stainless steel material, an iron-nickel alloy or an iron-cobalt-nickel alloy.
Further, still include: the applied electric field strength is 50V/cm-200V/cm, and the time is 0.5-2 minutes.
In the embodiment of the invention, flash firing is a phenomenon of nonlinear conductance, luminescence and rapid densification of the material under the action of a proper temperature and an electric field. The curves of the electric field intensity, the current density and the power density of the flash combustion process along with the time can generally divide the whole process into three stages, which respectively correspond to the processes of inoculation (Incubation), mutation (Transient) and Steady-state (Steady-state). The material can be almost completely compact from 0-50% of relative density within a few seconds, so that the sintering time is greatly shortened, the energy consumption is reduced, and the sintering efficiency is improved.
The method for processing the Solid Oxide Fuel Cell (SOFC) multilayer co-fired material can improve the bonding strength of each interface in the material. And repeatedly applying an electric field to the multilayer structure to enable the material and the structure to repeatedly undergo a flash second stage (mutation stage), so that atoms/ions on the interface are rapidly diffused, the bonding strength of the interface is greatly improved, and the stress of the interface is relieved, thereby reducing the layer cracking/cracking of the SOFC in the use process.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a SOFC multilayer co-fired material provided by an embodiment of the invention;
fig. 2 is a schematic diagram of SOFC multilayer co-fired material provided by the embodiment of the invention with power density varying with time;
fig. 3 is a schematic structural diagram of a SOFC multilayer co-fired material provided in embodiment 1 of the present invention;
fig. 4 is a schematic diagram of the change of power density of SOFC multilayer co-fired material with time provided by embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of an SOFC multilayer co-fired material provided in embodiment 2 of the present invention;
fig. 6 is a schematic diagram of the change of power density of SOFC multilayer co-fired material with time provided by embodiment 2 of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
Example 1
This example deals with a multilayer co-fired material for a solid oxide fuel cell, which is La as shown in FIG. 31-xSrxCo1-yFeyO3(LSCF) as cathode, YSZ and GDC as cathodeElectrolyte, Ni-YSZ is anode.
LSCF and Ni-YSZ were coated with platinum electrodes and the electrodes were sintered as specified by the different platinum pastes. The bonding of the electrode to the material is good. The multilayer co-fired ceramic with platinum electrodes on the surface is connected in series in a circuit and placed in a sintering furnace.
And heating the sintering furnace to 800 ℃, and keeping the temperature for 10 minutes. An electric field of 100V/cm was applied, and a voltage of 5V was applied assuming that the thickness of the multilayer co-fired ceramic was 0.5 mm. After the electric field is applied, the flash phenomenon occurs, the current is rapidly increased, and the power supply is automatically switched to a current mode. At which time the power is immediately turned off. After 10 seconds, the electric field was applied again, and the second stage (abrupt change stage) of flash firing was repeated 10 times. And cooling the furnace until the temperature is reduced to room temperature. The approximate power density change over time is shown in fig. 4.
Example 2
This example deals with a multilayer co-fired material for a solid oxide fuel cell, which is BaCo as shown in FIG. 50.4Fe0.4Zr0.1Y0.1O3-δ(BCFZY) as cathode, BaZr0.1Ce0.7Y0.1Yb0.1O3–δ(BZCYb) is an electrolyte, and Ni-BZCYb is an anode. Coating platinum electrodes on both ends, and sintering the electrodes according to the specifications of different platinum slurries. The electrode is well bonded to the material. The multilayer co-fired ceramic with platinum electrodes on the surface is connected in series in a circuit and placed in a sintering furnace. The platinum electrode may be omitted.
And heating the sintering furnace to 900 ℃, and keeping the 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, the flash phenomenon occurs, the current is rapidly increased, and the power supply is automatically switched to the current mode. At which time the power is immediately turned off. After 10 seconds, the electric field was applied again, and the second stage (abrupt change stage) of flash firing was repeated 10 times. And cooling the furnace until the temperature is reduced to room temperature. The variation of the power density with time is shown in fig. 6.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A method for processing an SOFC multilayer co-fired material is characterized by comprising the following steps:
serially connecting the SOFC multilayer co-fired material in a circuit, placing the circuit in a sintering furnace, and heating to 400-1400 ℃ in an inert atmosphere;
and applying an electric field to the SOFC multilayer co-fired material, turning off a power supply when a flash combustion phenomenon occurs, and cooling the SOFC multilayer co-fired material to room temperature after repeating for many times.
2. The process of claim 1, wherein a multilayer co-fired anode supported SOFC, comprises in sequence: an anode support, an electrolyte, a cathode; or a multilayer co-fired electrolyte supported SOFC material, which sequentially comprises an anode, an electrolyte support and a cathode; or the SOFC material supported by the multilayer co-fired cathode sequentially comprises: an anode, an electrolyte, a cathode support; or the SOFC material supported by the multilayer co-fired metal sequentially comprises: metal support, anode, electrolyte, cathode;
both ends of the SOFC multilayer material are coated with platinum electrodes and sintered, and an electric field is applied to the SOFC multilayer material with platinum electrodes.
3. The processing method according to claim 2,
the cathode layer comprises La1-xSrxMnO3、La1-xSrxCo1-yFeyO3、Sm0.5Sr0.5CoO3、BaCo0.4Fe0.4Zr0.1Y0.1O3-δOr Ba0.5Sr0.5Co0.8Fe0.2O3-δAt least one of (1).
4. The treatment method according to claim 1 or 2, wherein the electrolyte layer comprises at least one of yttria-stabilized zirconia, scandia-stabilized zirconia, doped ceria, a bismuth oxide-based electrolyte material, or a perovskite-structured electrolyte.
5. The treatment method according to claim 4, wherein the doped cerium oxide comprises: gadolinium oxide doped ceria or samarium oxide doped ceria.
6. The treatment method according to claim 4, wherein the perovskite-structured electrolyte comprises: LaGaO3And Sr, Mg doped LaGaO3,BaZr0.1Ce0.7Y0.2O3-αOr Yb-doped BaZr0.1Ce0.7Y0.2O3-α
7. The process of claim 2 wherein the anode layer comprises a nickel-based anode or a Co, Ru metal doped Ni-based anode.
8. The process of claim 7, wherein the nickel-based anode comprises Ni/YSZ, Ni/GDC, Ni/SDC, or Ni/perovskite.
9. The process of claim 2, wherein the metal support comprises a stainless steel material, an iron-nickel alloy, or an iron-cobalt-nickel alloy.
10. The treatment according to claim 1, wherein the electric field strength is applied at 50V/cm to 200V/cm for 0.5 to 2 minutes.
CN202210275913.9A 2022-03-21 2022-03-21 Method for processing SOFC multilayer co-fired material Pending CN114649554A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117577909A (en) * 2024-01-15 2024-02-20 港华能源创科(深圳)有限公司 Sintering method and structure of anode supported SOFC half-cell

Citations (2)

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Publication number Priority date Publication date Assignee Title
US20140306381A1 (en) * 2011-07-29 2014-10-16 Rishi Raj Methods of flash sintering
CN110078496A (en) * 2018-01-25 2019-08-02 国家电投集团科学技术研究院有限公司 The preparation method and preparation facilities of ceramic material

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US20140306381A1 (en) * 2011-07-29 2014-10-16 Rishi Raj Methods of flash sintering
CN110078496A (en) * 2018-01-25 2019-08-02 国家电投集团科学技术研究院有限公司 The preparation method and preparation facilities of ceramic material

Non-Patent Citations (2)

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Title
JUNGHUM PARK, ET AL,: "Sub-second sintering process for La6Sr4Co2Fe8O3-δ-gadolinium doped ceria composite cathode via a flash light irradiation method for intermediate temperature-solid oxide fuel cells", 《JOURNAL OF ALLOYS AND COMPOUNDS》, vol. 895, 23 November 2021 (2021-11-23), pages 1 - 9, XP086892143, DOI: 10.1016/j.jallcom.2021.162683 *
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117577909A (en) * 2024-01-15 2024-02-20 港华能源创科(深圳)有限公司 Sintering method and structure of anode supported SOFC half-cell

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