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A method for preparing electrolyte film by pre-pressing assisted sintering, battery/electrolytic cell

An electrolyte film and assisted sintering technology, which is applied in the direction of electrolytic components, electrolytic processes, fuel cells, etc., can solve the problem of reduction and achieve the effect of simplified process, simple equipment, and consistent density

Active Publication Date: 2022-05-17
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method utilizes the pressure-assisted method to directly prepare a dense electrolyte film on a metal support, which can solve the problem of sintering and densification of the electrolyte film, and at the same time reduce the sintering temperature, simplify the sintering process, reduce the sintering cost, and further realize commercial applications.

Method used

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  • A method for preparing electrolyte film by pre-pressing assisted sintering, battery/electrolytic cell
  • A method for preparing electrolyte film by pre-pressing assisted sintering, battery/electrolytic cell
  • A method for preparing electrolyte film by pre-pressing assisted sintering, battery/electrolytic cell

Examples

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Effect test

Embodiment 1

[0091] Using powder metallurgy method 10×10cm 2 The Cr-Fe support body, the Fe content is 10%, the porosity of the support body is guaranteed at 40%, after the surface of the support body is guaranteed to be flat, a layer of NiO-GDC with a certain amount of pore-forming agent is cast as the anode, the thickness is 50 μm. After drying, continue to cast a layer of GDC as electrolyte with a thickness of 30 μm. After drying, put it into a heating furnace for debinding treatment by slowly raising the temperature at 1-2°C / min to 200-300°C for 1h-2h. After debinding, add a layer of high-pressure polyethylene film on top of the electrolyte powder layer as a pressure transmission medium layer with a thickness of 1mm. Then the material is placed in the mold, and pressurized by a hydraulic press with a pressure of 250MPa. After pressurization, the anode and electrolyte are sintered, and the sintering temperature is 1350°C. After the sintering is completed, the test gas leakage rate m...

Embodiment 2

[0094] 10×20cm prepared by powder metallurgy 2 The Cr-based porous support body, the Fe content is 7%, the porosity of the support body is guaranteed to be 40%, after the surface of the support body is guaranteed to be smooth, a layer of NiO-ScSZ with a certain amount of pore-forming agent is cast as the anode, the thickness is 50 μm. After drying, continue to cast a layer of ScSZ (zirconia-based) as electrolyte with a thickness of 20 μm. After drying, put it into a heating furnace for debinding treatment by slowly raising the temperature at 1-2°C / min to 250°C for 1 hour. After debinding, add a layer of polyethylene film with a thickness of 0.5mm on top of the electrolyte powder layer as a pressure transmission medium layer, then place the material in the mold, and pressurize it with a hydraulic press at a pressure of 350MPa. After pressurization, the anode and electrolyte are sintered, and the sintering temperature is 1350°C. After the sintering is completed, the test gas ...

Embodiment 3

[0096] 15×15cm prepared by powder metallurgy 2 The ferritic stainless steel support body, the Cr content is 22%, the porosity of the support body is controlled at 40%, after the surface is smoothed, a layer of NiO-GDC with a certain amount of pore-forming agent is cast as the anode, and the thickness is 30 μm , sintered at 1100 ° C for 1 hour, and then continued to flow casting to prepare a Co-doped GDC electrolyte, and the thickness of the electrolyte slurry layer was 50 μm. After drying, put it into a heating furnace for debinding treatment by slowly raising the temperature at 1-2°C / min to 250°C for 1 hour. After debinding, a layer of polyamide film with a thickness of 1 mm is added on the electrolyte powder layer as a pressure transmission medium layer, and the above materials are placed in a hydraulic press for pressurization treatment with a pressure of 300 MPa. After pressurization, the anode and electrolyte are sintered, and the sintering temperature is 1050°C. After ...

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Abstract

The invention provides a method for preparing an electrolyte film by pre-pressing assisted sintering, and a battery / electrolytic cell. The method includes: first removing the solvent and part of the binder in the electrolyte layer through pre-sintering; then, adding a pressure transmission medium on the electrolyte layer layer, and then use the pressure transmission medium layer as a medium to apply pressure to the electrolyte layer; combined with sintering and densification treatment, a dense electrolyte film can finally be obtained. In the method provided by the present invention, on the basis of removing the solvent and part of the adhesive in the electrolyte, combined with the additional pressure transmission medium layer, the electrolyte layer can be processed by a conventional pressure applying device (such as a press or a roller press). Uniform densification by pre-press assisted sintering. Therefore, the preparation method provided by the present invention can not only obtain a uniform and dense electrolyte film, but also simplify the pressurization process and reduce the manufacturing cost. Therefore, the method has a very high commercial application prospect.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cell production equipment, in particular to a method for preparing an electrolyte film by pre-pressing assisted sintering, and a battery / electrolytic cell. Background technique [0002] As a new type of electrochemical power generation device, solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) has great application prospects. The specific performance is as follows: firstly, SOFC has high energy efficiency per unit volume and volumetric energy density, which can realize high-power and high-efficiency power generation. If combined heat and power, its energy conversion efficiency can reach more than 80%; secondly, SOFC has the characteristics of low pollution , which is environmentally friendly; at the same time, SOFC has good energy adaptability, and can directly use hydrocarbon fuel gases such as natural gas, petroleum liquefied gas, and coal gas. [0003] A solid oxide fuel cell consist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1213H01M8/1246H01M8/1253H01M8/126C25B9/17C25B11/031
CPCH01M8/1213H01M8/1246H01M8/1253H01M8/126H01M2008/1293Y02E60/50
Inventor 李成新李娇苏康思远
Owner XI AN JIAOTONG UNIV
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