Method for preparing anode of solid oxide fuel cell by using immersion method

A solid oxide, fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of easy performance degradation, easy aging, low anode stability, etc., to improve stability, not easy to fall off, and simple preparation process Effect

Inactive Publication Date: 2012-01-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention aims to solve the problem that the anode of the solid oxide fuel cell prepared by the impregnation method has low stability and is easy to age and cause the performance to decline easily; and provides a method for preparing the anode of the solid oxide fuel cell by the impregnation method

Method used

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  • Method for preparing anode of solid oxide fuel cell by using immersion method
  • Method for preparing anode of solid oxide fuel cell by using immersion method
  • Method for preparing anode of solid oxide fuel cell by using immersion method

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specific Embodiment approach 1

[0015] Embodiment 1: The method for preparing solid oxide fuel cell anode by impregnation method in this embodiment is carried out according to the following steps: 1. Mix the catalyst, dispersant and solvent evenly to obtain the impregnation solution, and the catalyst is a metal nitrate , metal ammonium salt, metal oxalate or metal organic acid salt, the metal in the catalyst is Ni, Cu, Ce, Co, Ag, Au, Pt, Pd, Rh or Ru, and the dispersant is alcohol (such as : ethanol), organic acid (such as: formic acid, acetic acid, oxalic acid, tartaric acid, malic acid, oxalic acid, benzoic acid, salicylic acid, caffeic acid), urea or ammonia water, solvent is water, alcohol or ether, catalyst The mass ratio of the catalyst and the dispersant is 100-1 / 100:1, and the total mass fraction of the catalyst and the dispersant is 0.1%-100%; 2. Introduce the impregnation solution into the porous anode support and bake at 400°C; 3. Repeat Step 2. Operate 5 to 20 times, and sinter in a high-tempera...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment is different from Embodiment 1 in that: the porosity of the porous anode support in step 2 is 20%-70%, and the high temperature resistance is 500-1600°C. Other steps and parameters are the same as in the first embodiment.

[0022] In this embodiment, the porosity is preferably 40% to 70%, most preferably 50%.

[0023] The porous anode support body can be a porous high-temperature-resistant ceramic support body prepared as a raw material after fully mixing yttria-stabilized zirconia, alumina, ceria and its doped oxides with a pore-forming agent, or it can be Ni-Fe and other resistant A porous metal support prepared by a superalloy mixed with a pore-forming agent. The pore-forming agent of the porous anode support can use graphite, flour, starch, cellulose, citric acid, macromolecular organic matter, etc. Nitric acid is removed to create pores.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step two, the reducing gas is H 2 or CH 4 . Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for preparing an anode of a solid oxide fuel cell by using an immersion method, belongs to the method for preparing the anode of a fuel cell, and solves the problem of easiness in performance weakening caused by low stability and easiness in aging of the conventional anode, which is prepared by using the immersion method, of the solid oxide fuel cell. The method comprises the following steps of: 1, preparing immersion liquid; 2, adding the immersion liquid into a porous anode supporting body, and roasting; 3, repeating the step 2, and sintering in an air atmosphere; and 4, restoring, and thus obtaining the anode of the solid oxide fuel cell. The method has the advantages that: selectable raw material sources are wide; a preparation process is simple; expensive experimental instruments are not required; large-scale application can be realized; the stability of the anode, which is prepared by using the immersion method with a dispersing agent, of the solid oxide fuel cell is improved; the electric conductivity and catalytic performance of the anode can be improved; porosity can be guaranteed by immersion of the porous anode supporting body; and fuel gas can smoothly reach the anode and an electrolyte interface for reaction, and generated water is drained.

Description

technical field [0001] The invention belongs to a fuel cell anode method. Background technique [0002] Solid oxide fuel cell (SOFC) is a power generation device that directly converts the chemical energy of fuel into electrical energy. It has the advantages of high efficiency, low pollution and wide range of fuel sources. According to the structure, SOFC is generally divided into two types: tube type and flat plate type. Its main components are the anode, electrolyte and cathode, and the oxidizing gas (mainly oxygen) is reduced on the cathode to form O 2- , O 2- Conducted to the anode through the electrolyte. SOFC supplies fuel through the anode, and the fuel interacts with O on the anode 2- The reaction is oxidized. Its anode must meet some basic requirements: provide a catalytically active surface; have sufficiently high electronic conductivity under reducing atmosphere and operating temperature, and remain stable for a long time; have a porous structure; , stable p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 关成志吕喆魏波黄喜强张耀辉关波潘伟平苏文辉
Owner HARBIN INST OF TECH
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