A kind of fuel cell and its preparation method and fuel cell anode material

A technology for fuel cells and anode materials, which is applied in fuel cells, battery electrodes, solid electrolyte fuel cells, etc., can solve the problems of complex preparation process of SOFC electrodes, limited metal material addition, and high production costs, and achieves good regulation and service life. long, simple effect

Active Publication Date: 2019-07-09
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are some disadvantages in the impregnation method: firstly, this method is cumbersome and requires multiple operations; secondly, the amount of metal material added is limited; finally, the gap between the metal particles and the electrode particles in the electrode porous layer prepared by the impregnation method poor bonding strength
On the other hand, at present, because the sintering temperature of the anode material is generally higher than that of the cathode material, the preparation of SOFC electrode materials often requires multiple calcinations, resulting in a complicated preparation process for SOFC electrodes and high production costs.

Method used

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  • A kind of fuel cell and its preparation method and fuel cell anode material
  • A kind of fuel cell and its preparation method and fuel cell anode material
  • A kind of fuel cell and its preparation method and fuel cell anode material

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preparation example Construction

[0028] A method for preparing a fuel cell, comprising: coating the anode material of the fuel cell on one side of the electrolyte support, and at the same time coating the cathode material on the other side of the electrolyte support, and sintering at a temperature of 800-900°C 1~5h.

[0029] The electrolyte support is made of Zr 2 O-based electrolyte or CeO 2 Based on electrolyte. Both types of electrolytes are commonly used in fuel cells and have a wide range of applications. Preferably, the electrolyte support is made of Y 2 O 3 Stable ZrO 2 (YSZ) made. YSZ has good oxygen ion conductivity at high temperature and high stability in oxidizing and reducing atmospheres, and is considered to be the material of choice for high-temperature electrolytes. Further, the surface of YSZ is also coated with Sm 2 O 3 Doped CeO 2 (SDC) functional layer. YSZ has low ion conductivity at medium temperature (500-800℃), which leads to poor battery performance. Add CeO 2 The basic functional lay...

Embodiment 1

[0035] This embodiment provides a fuel cell, which is manufactured by the following steps:

[0036] S1. Preparation of La by solid-phase reaction method 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ Anode precursor powder.

[0037] S2, the synthesized La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ Silver paste and binder are added to the anode precursor powder, where La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ The mass ratio of anode precursor powder to silver paste is 1:0.25, the mass ratio of ethyl cellulose to terpineol in the binder is 1:20, and the binder content is La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ 1.5 times the total mass of anode precursor powder and silver paste. After being fully stirred and evenly mixed, a fuel cell anode material is obtained.

[0038] S3. Use YSZ electrolyte coated with SDC functional layer to make an electrolyte support, and use screen printing to coat the fuel cell anode material on one side of the electrolyte support. At the same time, prepare the LSM cathode on the other side of t...

Embodiment 2

[0040] This embodiment provides a fuel cell, which is manufactured by the following steps:

[0041] S1. Preparation of La by solid-phase reaction method 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ Anode precursor powder.

[0042] S2, the synthesized La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ Silver paste and binder are added to the anode precursor powder, where La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ The mass ratio of anode precursor powder to silver paste is 1:0.43, the mass ratio of ethyl cellulose to terpineol in the binder is 1:20, and the binder content is La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3-δ 1.5 times the total mass of anode precursor powder and silver paste. After being fully stirred and evenly mixed, a fuel cell anode material is obtained.

[0043] S3. Use YSZ electrolyte coated with SDC functional layer to make an electrolyte support, and use screen printing to coat the fuel cell anode material on one side of the electrolyte support. At the same time, prepare the LSM cathode on the other side of t...

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Abstract

The invention provides a fuel cell anode material, belonging to the field of fuel cells, which is prepared by mixing a perovskite-type anode precursor powder with silver paste and a binder, and the content of the silver paste in the fuel cell anode material is 20 to 50 wt%. . Compared with the anode material prepared by the traditional impregnation method, the fuel cell anode material adopts a direct mixing method, which is simpler to operate and easier to adjust the conductivity. The present invention also provides a fuel cell and a preparation method thereof. The method adopts the anode material of the fuel cell mentioned above, and by mixing silver paste, the sintering temperature of the anode material is reduced, so that the anode material and the cathode material can be co-sintered in a medium temperature zone, The production process is greatly simplified and the production cost is saved. The fuel cell has the characteristics of longer service life, high conductivity and strong binding force of the anode material.

Description

Technical field [0001] The present invention relates to the field of fuel cells, in particular to a fuel cell, a preparation method thereof, and a fuel cell anode material. Background technique [0002] The solid oxide fuel cell (SOFC) is an efficient and environmentally friendly power generation device that can directly convert the chemical energy of the fuel into electrical energy. Traditional SOFC generally uses Ni-YSZ cermet as the battery anode. This anode material has the advantages of high catalytic activity, high conductivity and high mechanical strength. However, this material is extremely sensitive to impurities in the fuel gas, and carbon deposits are formed on the surface of Ni particles when hydrocarbons are used as fuel. In addition, during the reduction and oxidation cycle, the mutual conversion between Ni and NiO will cause damage to the anode structure, resulting in the degradation of SOFC performance. [0003] In recent years, the research on SOFC anodes has ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M8/1231
CPCH01M4/8652H01M4/8673H01M8/12H01M2008/1293Y02E60/50Y02P70/50
Inventor 何寿成汪继涛裴海鹏诸华军
Owner YANCHENG INST OF TECH
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