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Method for improving performance of electrode thin film and solid oxide fuel cell obtained thereby

A technology of electrode film and performance, applied in the field of solid oxide fuel cells, can solve the problems of limited battery area and thickness, easy to break, poor mechanical strength, etc., and achieve the effect of improving contact effect, reducing rigidity, and stabilizing diffusion speed

Inactive Publication Date: 2020-04-28
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the core components of high-temperature solid oxide fuel cells are mainly oxide ceramic materials, the mechanical strength is poor, and they are easy to break during processing, which limits the area and thickness of the battery.

Method used

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  • Method for improving performance of electrode thin film and solid oxide fuel cell obtained thereby
  • Method for improving performance of electrode thin film and solid oxide fuel cell obtained thereby
  • Method for improving performance of electrode thin film and solid oxide fuel cell obtained thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is mainly used as a control experiment group, and the battery used is an anode-supported single fuel cell (battery size 5*5cm 2 ), the battery structure is NiO-YSZ / YSZ / GDC / LSCF, and all preparation methods are routine operations that have been verified by experiments. Electrolyte YSZ layer, GDC barrier layer and LSCF cathode layer were respectively prepared on the anode support layer NiO-YSZ substrate by screen printing method. After repeated printing, a certain thickness of the electrode film is obtained. Then, increase the temperature at a rate of 2 °C / min to 400 °C / min and keep it for 2 hours. After the organic substances in the slurry are completely volatilized, then increase the rate of temperature at 1 °C / min to 900 °C / min and keep it for 2 hours. Finally, cool down to room temperature at a cooling rate of 2°C / min. figure 1It is the sectional view of the untreated battery of this embodiment, and the performance of the untreated electrode thin-fil...

Embodiment 2

[0034] The battery structure used in this embodiment is the same as that in Embodiment 1. In order to further improve the performance of the battery, in this embodiment, a saturated ethanol steam bath is used to treat the films of all levels prepared by the printing method for the second time. The specific implementation method is as follows: the electrolyte YSZ layer, the GDC barrier layer and the LSCF cathode layer are respectively prepared on the anode support layer NiO-YSZ substrate by the screen printing method, and each layer of film is printed, and first placed in a closed ethanol saturated steam device , keep for 3 minutes, when the film is fully flat and there is no obvious printing grid on the surface, then place it on a flat heating platform at 125°C for pre-curing. The pre-cured film has undergone repeated printing and repeated ethanol saturated steam treatment , to obtain a uniform and flat multi-layer electrode film with a certain thickness. Finally, it is proce...

Embodiment 3

[0036] The battery structure used in this example is the same as that in Example 1. The difference is that different types of organic alcohols are used. In this example, closed propanol saturated steam is used to treat the flatness of the film. The LSCF oxygen electrode was prepared by the screen printing method, and the specific implementation method was as follows: the electrolyte YSZ layer, the GDC barrier layer and the LSCF cathode layer were respectively prepared on the anode support layer NiO-YSZ substrate by the screen printing method, and each layer of film printing was completed. Place it in a closed propanol saturated steam device and keep it for 3 minutes. After the film is fully flat and there is no obvious printing grid on the surface, it is then placed on a flat heating table at 125°C for pre-curing. After pre-curing the film, after Repeated printing and repeated ethanol saturated steam treatment to obtain a uniform and flat multi-layer electrode film with a cer...

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Abstract

The invention relates to a method for improving the performance of an electrode thin film. The method comprises the steps of preparing an anode layer; forming an electrolyte thin layer through silk-screen printing, and placing the electrolyte thin layer in a closed environment filled with first organic alcohol saturated steam for homogenizing to prepare an electrolyte layer; forming a barrier thinlayer through silk-screen printing, placing the barrier thin layer in a closed environment filled with second organic alcohol saturated steam for homogenizing to prepare a barrier layer; forming a cathode thin layer through silk-screen printing, and placing the cathode thin layer in a closed environment filled with third organic alcohol saturated steam for homogenizing to prepare a cathode layer;and sequentially placing the anode layer, the electrolyte layer, the barrier layer and the cathode layer from bottom to top, and performing hot pressing under the conditions of 80-180 DEG C and 2-8MPa to obtain the solid oxide fuel cell. The invention further provides a solid oxide fuel cell which is obtained according to the method. According to the invention, the flatness and uniformity of thethin film are significantly improved, and the energy conversion efficiency and stability are improved.

Description

technical field [0001] The invention relates to a solid oxide fuel cell, more particularly to a method for improving the performance of an electrode film and a solid oxide fuel cell obtained therefrom. Background technique [0002] The fuel cell directly converts the chemical energy of the fuel into electrical energy through an electrochemical reaction, and has the characteristics of high energy conversion efficiency and low environmental pollution. Among them, since there is no need to use noble metal catalysts or catalytic components, and it is compatible with hydrogen and various carbon-containing gases and coal gasification for power generation, solid oxide fuel cells are considered to be one of the new power generation technologies with great application prospects. [0003] The core components of solid oxide fuel cells are generally composed of three layers of membranes: anode, electrolyte and cathode. However, since each component is solid, the point contact between s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1213H01M8/1231
CPCH01M8/1213H01M8/1231H01M2008/1293Y02E60/50
Inventor 林逍王建强张林娟关成志肖国萍周靖鲍洪亮王羽
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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