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Method for preparing double-layered pore-structured solid oxide fuel cell (SOFC) anode by impregnation method

A solid oxide, fuel cell technology, applied in solid electrolyte fuel cells, battery electrodes, structural parts, etc., can solve the problems of low electrochemical activity and uneven distribution of metal nickel nanoparticles, improve output performance, avoid significant The effect of agglomeration and maintaining the stability of the microstructure

Inactive Publication Date: 2014-05-28
HARBIN INST OF TECH
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Problems solved by technology

[0005] The present invention aims to solve the technical problem of low electrochemical activity caused by the non-uniform distribution of metal nickel nanoparticles in the porous YSZ support in the impregnation process of preparing solid oxide fuel cell anodes by the existing impregnation method, thereby providing a Method for preparing solid oxide fuel cell anode with double-layer pore structure by impregnation method

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  • Method for preparing double-layered pore-structured solid oxide fuel cell (SOFC) anode by impregnation method

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specific Embodiment approach 1

[0017] Embodiment 1: A method of preparing a solid oxide fuel cell anode with a double-layer pore structure by an impregnation method in this embodiment is carried out according to the following steps:

[0018] 1. Put 1-5 parts of 8YSZ powder and 1-5 parts of flour into an agate mortar and grind until they are evenly mixed to obtain mixed powder 1, and then put 0.14-0.22g of mixed powder 1 into a 13mm-diameter In a stainless steel mold, hold the pressure for 5-30s under a pressure of 100-300MPa to make a YSZ anode support with flour as a pore-forming agent;

[0019]2. Put 1-5 parts of 8YSZ powder and 1-5 parts of cassava flour into an agate mortar and grind them until they are evenly mixed to obtain mixed powder 2. Sieve and spread 0.02-0.1g of mixed powder 2 evenly on the surface of the YSZ anode support obtained in step 1 with flour as a pore-forming agent, apply a pressure of 300-500MPa and keep the pressure for 20-80s, take it out, and then put it in high temperature In a...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 1, the pressure is kept at 200 MPa for 15 seconds. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 2, a pressure of 400 MPa is applied and the pressure is maintained for 50 seconds. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a method for preparing a double-layered pore-structured SOFC anode by an impregnation method, relates to a method for preparing an SOFC anode, and aims to solve the technical problem of low electrochemical activity caused by the nonuniform distribution of metallic nickel nano particles, in a porous YSZ (yttria stabilized zirconia) supporter, existing during the impregnation process when the SOFC anode is prepared in the conventional impregnation method. The method comprises the following steps: (1), preparing an YSZ anode supporter adopting flours as pore-forming agents; (2), preparing a porous YSZ anode supporter with a double-layered pore structure and poriness; (3), preparing a compact YSZ electrolyte membrane; (4), preparing a compact YSZ electrolyte surface cathode; (5), preparing the double-layered pore-structured SOFC anode through impregnation. The SOFC anode can greatly improve the output performance of a single cell as compared with the performances of cells prepared by adopting single pore-forming agents, and can be applied in the field of SOFC anode preparation.

Description

technical field [0001] The invention relates to a method for preparing an anode of a solid oxide fuel cell. Background technique [0002] Solid oxide fuel cell (SOFC) is a new type of energy conversion device, which can directly convert the chemical energy of fuel into electrical energy without going through the Carnot cycle process, so its efficiency is not limited by the Carnot cycle efficiency, and the overall efficiency can be Up to 80% or more. In the case of increasingly severe energy and environmental problems, SOFC has become a hot spot and key direction of research in various countries. The traditional SOFC uses an electrolyte-supported structure, in which the thickness of the yttria-stabilized zirconia (YSZ) electrolyte is on the order of millimeters. YSZ serves as the electrolyte on the one hand and the support of the entire battery on the other hand. Due to the large thickness of the YSZ electrolyte used, the traditional SOFC needs to work at about 1000°C to re...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCH01M4/8875H01M4/8885H01M4/8896H01M8/10Y02E60/50
Inventor 张耀辉高园园吕喆黄喜强魏波朱星宝王志红苏文辉
Owner HARBIN INST OF TECH
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