Preparation method of cathode barrier layer of metallic-propping solid oxide fuel cell

A fuel cell cathode and solid oxide technology, which is applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of high film cost and battery performance degradation, avoid volatility loss, avoid film shedding, and facilitate scale-up and scale The effect of chemical manufacturing

Inactive Publication Date: 2015-01-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The interlayer is prepared at a relatively low temperature by radio frequency magnetron reactive sputtering, which avoids the reaction with the zirconia-based electrolyte to form a cerium-zirconium oxide solid solution, but the sputtered dense layer needs to be between 400 and 1000°C Annealing treatment, the metal support will be oxidized in this temperature range, resulting in degradation of battery performance; at the same time, the cost of preparing thin films by radio frequency magnetron reactive sputtering is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A, ethyl cellulose is dissolved in terpineol, and the ethyl cellulose terpineol solution that makes ethyl cellulose content is 2wt% is applied to the deposition of cathode barrier layer as screen printing binder ;

[0025] B. Will Ce 0.8 Gd 0.2 o 2-δ The powder was added to the ethyl cellulose terpineol solution, and ground for 4 hours to obtain a stable and uniform cathode barrier layer slurry, wherein Ce 0.8 Gd 0.2 o 2-δ The weight ratio of powder and ethylcellulose terpineol solution is 2:1;

[0026] C, the cathode barrier layer slurry is evenly deposited on AM-1 (composition as shown in Table 1) support body / Fe by screen printing 2 o 3 -Ce 0.8 Gd 0.2o 2-δ Thin film / NiO-YSZ thin film / YSZ thin film half-cell;

[0027] D. Sinter the metal-supported half-cell containing the cathode barrier layer at 1200° C. for 4 hours in a vacuum atmosphere with a pressure of 0.5 Pa, control the heating and cooling rate to 3° C. / min, and cool to room temperature to prepare t...

Embodiment 2

[0031] A, ethyl cellulose is dissolved in terpineol, and the ethyl cellulose terpineol solution that makes ethyl cellulose content is 3wt% is applied to the deposition of cathode barrier layer as screen printing binding agent ;

[0032] B. Will Ce 0.8 SM 0.2 o 2-δ The powder was added to the ethyl cellulose terpineol solution, and ground for 3 hours to obtain a stable and uniform cathode barrier layer slurry, wherein Ce 0.8 SM 0.2 o 2-δ The weight ratio of powder and ethylcellulose terpineol solution is 2.5: 1;

[0033] C, the cathode barrier layer slurry is evenly deposited on AM-1 (composition as shown in Table 1) support body / Fe by screen printing 2 o 3 -Ce 0.8 Gd 0.2 o 2-δ Thin film / NiO-YSZ thin film / YSZ thin film half-cell;

[0034] D. Sinter the metal-supported half-cell containing the cathode barrier layer at a temperature of 1100° C. for 4 hours in a vacuum atmosphere with a pressure of 1.0 Pa, control the heating and cooling rate to 4° C. / min, and cool to r...

Embodiment 3

[0036] A, ethyl cellulose is dissolved in terpineol, and the ethyl cellulose terpineol solution that makes ethyl cellulose content is 1wt% is applied to the deposition of cathode barrier layer as screen printing binder ;

[0037] B. Will Ce 0.85 Y 0.15 o 2-δ The powder was added to the ethyl cellulose terpineol solution, and ground for 2 hours to obtain a stable and uniform cathode barrier layer slurry, wherein Ce 0.85 Y 0.15 o 2-δ The weight ratio of powder and ethylcellulose terpineol solution is 4:1;

[0038] C, the cathode barrier layer slurry is evenly deposited on AM-1 (composition as shown in Table 1) support body / Fe by screen printing 2 o 3 -Ce 0.8 Gd 0.2 o 2-δ Thin film / NiO-YSZ thin film / YSZ thin film half-cell;

[0039] D. Sinter the metal-supported half-cell containing the cathode barrier layer at 1150° C. for 3.5 hours in a vacuum atmosphere with a pressure of 0.1 Pa, control the heating and cooling rate to 5° C. / min, and cool to room temperature to prep...

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Abstract

The invention discloses a preparation method of a cathode barrier layer of a metallic-propping solid oxide fuel cell. The preparation method comprises the following steps: adding cathode barrier layer material powder into an ethylene cellulose terpilenol solution proportionally and grinding to obtain paste; depositing the paste on a thick porous metal propping layer film/thin porous metal ceramic gradient transition layer film/thin porous anode layer film/thin compact electrolyte layer film half cell in a silk-screen printing manner; sintering for 2-4h at 1000-1200 DEG C in a vacuum atmosphere, controlling the temperature rise and temperature reduction rate to 0.5-5 DEG C/min, and cooling to room temperature to obtain a product. The cathode barrier layer is sintered at high temperature in a low vacuum atmosphere, so that a supporting body is prevented from being oxidized excessively, the film dropping caused by cerium valence reduction in a cerium-oxide-based electrolyte barrier layer in a reducing atmosphere is avoided, and the volatile loss of Ga in LaGaO3-based electrolyte barrier layer is also avoided, and therefore, a high-performance cathode material can be effectively prevented from reacting with zirconium-oxide-based solid electrolyte under a preparation condition.

Description

technical field [0001] The invention relates to the technical field of fuel cell materials, in particular to a method for preparing a metal-supported solid oxide fuel cell cathode barrier layer. Background technique [0002] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, SOFC) is an all-solid-state power generation device that directly converts the chemical energy in the fuel into electrical energy through an electrochemical reaction. The conversion process has many advantages, among which the outstanding advantage is the wide applicability of fuel, that is, hydrogen, carbon monoxide and hydrocarbons can be used as fuel, so hydrogen, carbon monoxide, natural gas, liquefied petroleum gas, coal gas, biomass can be widely used Various hydrocarbon fuels such as gas, methanol and ethanol. Solid oxide fuel cells have a wide range of applications, and their main applications include distributed power stations, household power stations, vehicle auxiliary power supplies, uninterrupti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCH01M8/0269H01M8/126Y02E60/50
Inventor 屠恒勇余晴春
Owner SHANGHAI JIAO TONG UNIV
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