Application of a doped double perovskite structure cathode material for intermediate temperature solid oxide fuel cells

A solid oxide, double perovskite technology, applied in battery electrodes, metal/metal oxide/metal hydroxide catalysts, structural parts, etc., can solve problems such as the reduction of catalytic oxygen reduction reaction ability, and achieve good electrocatalysis Activity, increased polarizability, strong conduction effect

Inactive Publication Date: 2015-12-09
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the existing solid oxide fuel cell cathode material La 1-x Sr x MnO 3 The problem of a sharp decrease in the ability to catalyze the oxygen reduction reaction under medium temperature conditions, and to provide an application of a doped double perovskite structure cathode material for a medium temperature solid oxide fuel cell

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  • Application of a doped double perovskite structure cathode material for intermediate temperature solid oxide fuel cells
  • Application of a doped double perovskite structure cathode material for intermediate temperature solid oxide fuel cells
  • Application of a doped double perovskite structure cathode material for intermediate temperature solid oxide fuel cells

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specific Embodiment approach 1

[0013] Specific embodiment 1: This embodiment is a double perovskite powder material doped with an alkaline earth element Sr as the cathode material of a medium temperature solid oxide fuel cell doped with a double perovskite structure, and the chemical formula is EuBa 1-x Sr x co 2 o 5+δ , where 0

[0014] The intermediate temperature solid oxide fuel cell doped double perovskite structure cathode material described in this embodiment has a chemical formula of EuBa 1-x Sr x co 2 o 5+δ The advantages of the alkaline earth element Sr-doped double perovskite powder material are high crystallinity and strong conductivity, thus exhibiting good electrocatalytic activity.

[0015] The intermediate temperature solid oxide fuel cell doped double perovskite structure cathode material described in this embodiment utilizes the doped ion Sr 2+ has a ratio of Ba 2+ The smaller ionic radius of ions increases the polarization ability of oxygen ions, which improves t...

specific Embodiment approach 2

[0016] Specific embodiment 2: This embodiment is a method for preparing a cathode material with a doped double perovskite structure for a medium-temperature solid oxide fuel cell, and the chemical formula is EuBa 1-x Sr x co 2 o 5+δ The alkaline earth element Sr-doped double perovskite powder material is specifically completed according to the following steps:

[0017] 1. Weighing: According to the chemical formula EuBa 1-x Sr x co 2 o 5+δ Weigh Eu according to Eu:Ba:Sr:Co=1:(1-x):x:2 2 o 3 、BaCO 3 , SrCO 3 and Co 3 o 4 ; the EuBa 1-x Sr x co 2 o 5+δIn 0

[0018] 2. Grinding: Eu 2 o 3 、BaCO 3 , SrCO 3 and Co 3 o 4 Put into the mortar and grind and mix to obtain the mixed material;

[0019] 3. Calcination: Calcinate the mixed material obtained in step 2 at a temperature of 1100-1250°C for 12h-24h to obtain the chemical formula EuBa 1-x Sr x co 2 o 5+δ Alkaline earth element Sr doped double perovskite powder material.

[0020] The pr...

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the specific operation of the grinding and mixing described in step two is as follows: the Eu weighed in step one 2 o 3 、BaCO 3 , SrCO 3 and Co 3 o 4 Put it into an agate mortar and grind and mix for 8min to 12min to obtain the initial mixed raw material, then add absolute ethanol to the initial mixed raw material, and continue to grind and mix for 25min to 35min to obtain the mixed material; the volume of the anhydrous ethanol The mass ratio to the starting mixed raw material is 10mL:(4g~7g). The other specific embodiment two is the same.

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Abstract

The invention relates to a cathode material and a preparation method thereof, particularly a moderate-temperature solid oxide fuel battery doped double-perovskit-structure cathode material and a preparation method thereof. The invention aims to solve the problem that the catalytic oxygen reduction reaction capacity of the existing solid oxide fuel battery cathode material La1-xSrxMnO3 acutely reduces under moderate temperature conditions. The moderate-temperature solid oxide fuel battery doped double-perovskit-structure cathode material is an alkaline earth element Sr-doped double-perovskite powder material, and the chemical formula is EuBa1-xSrxCo2O5+delta. The method comprises the following steps: 1. weighing materials according to the chemical formula EuBa1-xSrxCo2O5+delta; 2. grinding to obtain a mixture; and 3. calcining to obtain the alkaline earth element Sr-doped double-perovskite powder material of which the chemical formula is EuBa1-xSrxCo2O5+delta. The invention is mainly used for preparing the moderate-temperature solid oxide fuel battery doped double-perovskit-structure cathode material.

Description

technical field [0001] The invention relates to the application of a cathode material. Background technique [0002] The solid oxide fuel cell is an electrochemical device that works under high temperature conditions. Its energy conversion is not limited by the Carnot cycle, and its efficiency is as high as about 80%. It is the preferred alternative energy source for thermal power stations, gas turbines and automobiles. The operating temperature of traditional solid oxide fuel cells is usually 800-1000°C, which will bring a series of problems to fuel cell technology: such as aging of materials, interdiffusion between components, high processing and maintenance costs, etc. The development of intermediate temperature solid oxide fuel cells has become one of the research hotspots in this field. Traditional solid oxide fuel cell cathode material La 1-x Sr x MnO 3 Below 1000 °C, the lower oxygen ion conductivity leads to a sharp decrease in the ability to catalyze the oxygen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B01J23/83
CPCY02E60/50
Inventor 夏天施展蒙富常
Owner HEILONGJIANG UNIV
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