Proton type solid oxide fuel cell cathode material and application

A fuel cell cathode and solid oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of first-order phase transition, poor long-term stability, and fast performance decay, and achieve high catalytic performance, good stability, well-matched effect

Inactive Publication Date: 2020-06-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many researches on the electrolyte of the proton-type solid oxide fuel cell, and in the cathode, the medium-low temperature oxygen ion-type cathode is usually applied to the proton-type solid oxide fuel cell system, resulting in poor matching between the electrode and the electrolyte, rapid performance decay and poor long-term stability
For example, studies have shown that BSCF has high performance in proton-type solid oxides, but its thermal matching and chemical compatibility with proton conductor electrolytes are poor, and it is easy to fall off the surface of the electrolyte during operation, resulting in large interface resistance. The first-order phase transition is easy to occur, and it is difficult to meet the long-term stable operation requirements
wxya 2 o 6-δ Bilayer perovskite materials such as bilayer perovskite materials have also been widely studied, but there are still problems such as matching and stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Ba(NO 3 ) 2 , Co(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Zr(NO 3 ) 4 ·5H 2 O, Y (NO 3 ) 3 ·6H 2 O, added into 250mL deionized water at a molar ratio of 1:0.3:0.3:0.2:0.2, heated and stirred at 80°C until the solution was clear. Then, according to the molar ratio of nitrate and glycine 1:1.0, weigh 0.25mol glycine and add it into it, adjust the pH to 7 with ammonia water, continue stirring and heating to evaporate water until the solution becomes a gel. BaCo obtained by self-propagating combustion method 0.3 Fe 0.3 Zr 0.2 Y 0.2 o 3-δ The primary powder was calcined at 1000°C for 2 hours to obtain the final powder. Add terpineol containing 6wt% ethyl cellulose (0.4:1 mass ratio to the powder) to the cathode powder, and grind evenly to obtain cathode slurry. The resulting slurry was coated to a 10 μm thick BaZr 0.8 Y 0.2 o 3-δ BaZr 0.8 Y 0.2 o 3-δ +NiO anode support film surface, sintered at 900 °C for 2h to obtain BCFZY / BZY / BZY-NiO battery. Perform...

Embodiment 2

[0013] Ba(NO 3 ) 2 , Co(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Ce(NO 3 ) 3 ·6H 2 O, Yb(NO 3 ) 3 ·6H 2 O, add it into 200mL deionized water at a molar ratio of 1:0.3:0.3:0.2:0.2, heat and stir at 80°C until the solution is clear. Then, according to the molar ratio of nitrate and glycine 1:1.0, weigh 0.24mol glycine and add it into it, adjust the pH to 6 with ammonia water, continue stirring and heating to evaporate water until the solution becomes a gel. BaCo obtained by self-propagating combustion method 0.3 Fe 0.3 Ce 0.2 Yb 0.2 o 3-δ The primary powder was calcined at 1000°C for 2 hours to obtain the final powder. Add terpineol containing 6wt% ethyl cellulose (0.4:1 mass ratio to the powder) to the cathode powder, and grind evenly to obtain cathode slurry. The resulting slurry was coated to a 15 μm thick BaCe 0.8 Yb 0.2 o 3-δ BaCe 0.8 Yb 0.2 o 3-δ The surface of the anode supporting film was sintered at 900°C for 2h to obtain a BCFZYb / BCYb / BCYb-NiO bat...

Embodiment 3

[0015] Ba(NO 3 ) 2 , Co(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Ce(NO 3 ) 3 ·6H 2 O, Yb(NO 3 ) 3 ·6H 2 O, added to 250mL deionized water at a molar ratio of 1:0.4:0.2:0.3:0.1, heated and stirred at 80°C until the solution was clear. Then, according to the molar ratio of nitrate and glycine 1:1.0, weigh 0.25 mol of glycine and add it, adjust the pH to 8 with ammonia water, and continuously heat and evaporate water until the solution becomes gelatinous. BaCo obtained by self-propagating combustion method 0.4 Fe 0.2 Ce 0.3 Yb 0.1 o 3-δ The primary powder was calcined at 1000°C for 2 hours to obtain the final powder. Add terpineol containing 6wt% ethyl cellulose (0.4:1 mass ratio to the powder) to the cathode powder, and grind evenly to obtain cathode slurry. The resulting slurry was coated to a 10 μm thick BaCe 0.7 Zr 0.1 Yb 0.2 o 3-δ BCe 0.7 Zr 0.1 Yb 0.2 o 3-δ +NiO anode support film surface, sintered at 900 °C for 2h to obtain BCFZYb / BCZYb / BCZYb-NiO ba...

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Abstract

The invention relates to a proton type solid oxide fuel cell cathode material. The cathode material is characterized in that the composition general formula of the cathode material is BaCo <0.6-x>Fe<x>M<0.4-y>N<y>O<3-delta>, wherein M is one of Zr or Ce, N is one of Y or Yb, x is greater than or equal to 0 and less than or equal to 0.6, y is greater than or equal to 0 and less than 0.4, and deltais greater than 0 and less than or equal to 0.5. The cathode material is well matched with a common proton type solid oxide electrolyte at medium and low temperatures, the requirement for electrochemical performance can be met by adjusting the cobalt-iron ratio, and the problem that the proton type solid oxide fuel cell cathode material is deficient is solved.

Description

technical field [0001] The invention belongs to the field of solid oxide fuel cells, and in particular relates to a proton-type solid oxide fuel cell cathode material. Background technique [0002] The operating temperature of proton-type solid oxide fuel cells is between 350°C and 650°C. Compared with the high-temperature operating environment of traditional oxygen-ion-conducting solid oxide fuel cells, it has the advantages of simple sealing, low cost and high stability. At present, there are many researches on the electrolyte of the proton-type solid oxide fuel cell, and in the cathode, the medium-low temperature oxygen ion-type cathode is usually applied to the proton-type solid oxide fuel cell system, resulting in poor matching between the electrode and the electrolyte, rapid performance decay and Poor long-term stability and other issues. For example, studies have shown that BSCF has high performance in proton-type solid oxides, but its thermal matching and chemical c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCH01M4/8647H01M4/8885H01M2004/8684Y02E60/50
Inventor 程谟杰戚惠颖赵哲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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