Solid oxide fuel cell cathode material and its composite cathode material and its preparation method and battery composite cathode preparation method

A fuel cell cathode, solid oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as performance degradation, difficulty in sintering and bonding of double perovskite cathode materials and electrolyte layers, etc., to increase electrical conductivity, improve The effect of battery performance

Active Publication Date: 2017-06-06
上海氢洋科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems that the existing perovskite cathode materials cannot meet the long-term operation of solid oxide fuel cells under medium temperature conditions, that is, the performance will be significantly reduced and the sintering and bonding of double perovskite cathode materials and electrolyte layers are difficult, and provide one with K 2 NiF 4 Structural double perovskite composite oxide and doped cerium oxide as composite cathode material for intermediate temperature solid oxide fuel cell and preparation method thereof, and preparation method of battery composite cathode using it as cathode material

Method used

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  • Solid oxide fuel cell cathode material and its composite cathode material and its preparation method and battery composite cathode preparation method
  • Solid oxide fuel cell cathode material and its composite cathode material and its preparation method and battery composite cathode preparation method
  • Solid oxide fuel cell cathode material and its composite cathode material and its preparation method and battery composite cathode preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Solid phase synthesis method:

[0045] to La 2 o 3 , SrCO 3 ,Co 2 o 3 , Fe 2 o 3 As raw material, according to La 1.2 Sr 0.8 co 0.8 Fe 0.2 o 4+δ The stoichiometric ratio of the mixture was prepared, and alcohol was used as a medium, and ball milled in an agate ball mill jar for 24 hours. After mixing evenly, it was dried in an oven at 120°C. Put the dried powder in the air at 1200°C for 12 hours, after cooling, use alcohol ball mill for 24 hours, dry at 120°C, and pass through a 200-mesh sieve to obtain La 1.2 Sr 0.8 co 0.8 Fe 0.2 o 4+δ Powder.

[0046] Synthetic La 1.2 Sr 0.8 co 0.8 Fe 0.2 o 4+δ Powder and Ce 0.8 SM 0.2 o 2 Mix according to the mass ratio of 70:30, ball mill for 24 hours to mix evenly, and dry at 120°C to obtain La 1.2 Sr 0.8 co 0.8 Fe 0.2 o 4+δ +Ce 0.8 SM 0.2 o 2 Composite cathode materials for solid oxide fuel cells.

Embodiment 2

[0048] Polymer precursor method:

[0049] Hydrated La(NO 3 ) 3 , hydrated Pr(NO 3 ) 3 , hydrated Ni(NO 3 ) 2 , hydrated Cu(NO 3 ) 2 As raw material, according to La 1.425 PR 0.475 Ni 0.8 Cu 0.2 o 4+δ The stoichiometric ratio is dissolved in deionized water to prepare solution a, and at the same time, an appropriate amount of citric acid and ethylene glycol are added to deionized water and stirred until completely dissolved to form solution b, wherein the molar ratio of metal ions: citric acid: ethylene glycol is 1:2:4. Mix solution b and solution a, stir until uniform, then continue heating and stirring at 80°C to form a gel, then place the gel at 400°C for 2 hours to carbonize the resin, and place the obtained porous foam product in the air for calcination at 1200°C After cooling for 12 hours, use alcohol ball milling for 24 hours, dry at 120°C, and pass through a 200-mesh sieve to obtain La 1.425 PR 0.475 Ni 0.8 Cu 0.2 o 4+δ Powder.

[0050] Synthetic La ...

Embodiment 3

[0052] Glycine-nitrate method:

[0053] With hydrated Nd(NO 3 ) 3 , hydrated Ni(NO 3 ) 2 , hydrated Co(NO 3 ) 2 As raw material, according to Nd 1.95 Ni 0.7 co 0.3 o 4+δ Dissolve the stoichiometric ratio in deionized water, then add an appropriate amount of glycine and stir evenly to form a solution, wherein the molar ratio of glycine: metal ion is 2:1, heat and stir at 100°C to form a wet gel, then increase the temperature to 250°C, After burning, collect the precursor powder and place it under argon for calcination at 1200°C for 12 hours, then place it under air again at 800°C for 12 hours, and after cooling, use alcohol ball mill for 24 hours, dry at 120°C, and pass through a 200-mesh sieve to obtain Nd 1.95 Ni 0.7 co 0.3 o 4+δ Powder.

[0054] with synthetic Nd 1.95 Ni 0.7 co 0.3 o 4+δ Powder and Ce 0.8 Gd 0.2 o 2 Mix according to the mass ratio of 50:50, ball mill for 24 hours to mix evenly, and dry at 120°C to get Nd 1.95 Ni 0.7 co 0.3 o 4+δ +Ce ...

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Abstract

The invention discloses a solid oxide fuel cell cathode material and a solid oxide fuel cell composite cathode material and a preparation method thereof and a cell composite cathode preparation method, the solid oxide fuel cell composite cathode material includes A2-x-zA 'xB1-yB' yO4 + delta (I) and Ce1-wMwO2 (II), the mass ratio of A2-x-zA 'xB1-yB' yO4 + delta (I) to Ce1-wMwO2 (II) is 30:70-70:30, A is one or more than one substance selected from Nd, Pr, La and Sm, A ' is one or more than one substance selected from Sr, Ca, Ba, Nd, Pr, La and Sm, B and B 'are respectively one or more than one substance selected from Mn, Fe, Co, Ni and Cu in one or several, wherein x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1, z is greater than or equal to 0 and less than or equal to 0.1, delta is greater than or equal to 0 and less than or equal to 1, M is one of Gd or Sm, and w is greater than or equal to 0 and less than or equal to 0.2. The solid oxide fuel cell composite cathode material can improve chemical stability and catalytic properties of a cathode in the medium temperature area, and the cell performance and operating life can be improved.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to a solid oxide fuel cell material and its composite cathode material, a preparation method thereof, and a battery composite cathode preparation method. Background technique [0002] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, abbreviated as SOFC) is an all-solid-state power generation device that directly converts chemical energy in fuel into electrical energy through electrochemical reactions. It is a new type of efficient and clean energy conversion device. SOFC has many advantages, such as: no need to use noble metals as electrodes; wide applicability of fuel, that is, hydrogen, carbon monoxide and hydrocarbons can be used as fuel; high energy conversion efficiency; fast electrode reaction; only gas-solid two The phase system eliminates the corrosion problem caused by the liquid electrolyte; the high-quality exhaust gas discharged can be combined with the gas t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88
CPCH01M4/8652H01M4/8835H01M4/9033Y02E60/50
Inventor 李斯琳
Owner 上海氢洋科技有限公司
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