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Anti-CO2-poisoning solid oxide fuel cell cathode material and preparation method of solid oxide fuel cell cathode material

A fuel cell cathode, solid oxide technology, applied in battery electrodes, chemical instruments and methods, iron compounds, etc., can solve problems such as reducing the electrochemical performance of cathode catalysts, and achieve improved anti-CO2 poisoning performance, good chemical stability, The effect of excellent resistance to CO2

Pending Publication Date: 2021-07-20
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to solve the problem that the existing solid oxide fuel cell cathode catalyst is easy to interact with CO in the air. 2 The reaction produces an insulating phase, which reduces the electrochemical performance of the cathode catalyst, and provides an anti-CO 2 Poisoned solid oxide fuel cell cathode material and preparation method thereof

Method used

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  • Anti-CO2-poisoning solid oxide fuel cell cathode material and preparation method of solid oxide fuel cell cathode material
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  • Anti-CO2-poisoning solid oxide fuel cell cathode material and preparation method of solid oxide fuel cell cathode material

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specific Embodiment approach 1

[0025] Specific embodiment 1: In this embodiment, an anti-CO 2 The chemical formula of the poisoned solid oxide fuel cell cathode material is Bi 0.5 Sr 0.5 Fe 1-x m x o 3-δ , wherein M is Ti, Mo, Nb or Ta, the value range of x is 0.1≤x≤0.4, and the value range of δ is 0≤δ≤0.1.

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that: the value range of x is 0.2≤x≤0.3. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: This embodiment is an anti-CO 2 The preparation method of the poisoned solid oxide fuel cell cathode material is completed according to the following steps:

[0028] One, Bi 2 o 3 , SrCO 3 , Fe 2 o 3 uniformly mixed with a metal oxide containing element M, then ground, and then calcined to obtain a cathode precursor powder;

[0029] The molar ratio of Bi element, Sr element, Fe element and M element in the cathode precursor powder described in step 1 is 0.5:0.5:(1-x):x, wherein the value range of x is 0.1≤x≤0.4 ;

[0030] 2. Put the cathode precursor powder into the mold, and then press the cathode precursor powder under pressure to obtain a cylinder; put the cylinder into a muffle furnace for sintering to obtain a dense ceramic sheet, and then the dense ceramic sheet Grinding to obtain cathode powder;

[0031] 3. The electrolyte powder Ce 0.9 Gd 0.1 o 1.95 Put it into the mold, and then put the electrolyte powder Ce under pressure ...

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Abstract

The invention discloses an anti-CO2-poisoning solid oxide fuel cell cathode material and a preparation method thereof, and relates to a cell cathode material and a preparation method thereof. The invention aims to solve the problem that an existing solid oxide fuel cell cathode catalyst is easy to react with CO2 in air to generate an insulating phase, so that the electrochemical performance of the cathode catalyst is reduced. The chemical formula of the anti-CO2-poisoning solid oxide fuel cell cathode material is Bi0.5Sr0.5Fe1-xMxO3-delta, wherein M is Ti, Mo, Nb or Ta. The method comprises the following steps: 1, preparing cathode precursor powder; 2, preparing cathode powder; 3, preparing a solid electrolyte substrate; 4, preparing symmetrical electrodes; and 5, sintering at high temperature to obtain Bi0.5Sr0.5Fe1-xMxO3-delta. The anti-CO2-poisoning solid oxide fuel cell cathode material can be obtained.

Description

technical field [0001] The invention relates to a battery cathode material and a preparation method thereof. Background technique [0002] The solid oxide fuel cell belongs to the third generation fuel cell, which is an all-solid-state chemical power generation device that directly converts the chemical energy stored in the fuel and oxidant into electrical energy at medium and high temperatures, with a power generation efficiency of 45% to 60% %, the cogeneration efficiency is as high as 80%. It can be widely used in fixed power stations, household power supplies, ship power, automobile power, space and aerospace and other fields. The cathode is an important part of the solid oxide fuel cell. The oxygen reduction reaction mainly occurs on the cathode side. The electrochemical performance of the material has a great influence on the long-term operation stability and output characteristics of the entire battery system. [0003] Among them, the iron-based perovskite structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00H01M4/90
CPCC01G49/009H01M4/9033C01P2002/72C01P2004/03C01P2006/40Y02E60/50
Inventor 李强赵辉孙丽萍
Owner HEILONGJIANG UNIV
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