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Absent double-perovskite structured negative electrode material of middle-temperature solid oxide fuel battery and preparation method for material

A solid oxide and double perovskite technology, applied in battery electrodes, structural parts, circuits, etc., can solve the problem of reduced ability to catalyze oxygen reduction reaction, achieve good electrocatalytic activity, increase polarization ability, and strong conductivity Effect

Inactive Publication Date: 2014-04-02
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 MnO 3 The ability to catalyze the oxygen reduction reaction is drastically reduced under medium temperature conditions, and a kind of cathode material with a vacant double perovskite structure for a medium temperature solid oxide fuel cell and its preparation method are provided

Method used

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  • Absent double-perovskite structured negative electrode material of middle-temperature solid oxide fuel battery and preparation method for material
  • Absent double-perovskite structured negative electrode material of middle-temperature solid oxide fuel battery and preparation method for material
  • Absent double-perovskite structured negative electrode material of middle-temperature solid oxide fuel battery and preparation method for material

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specific Embodiment approach 1

[0013] Specific implementation mode 1: This implementation mode is a double perovskite powder material in which the cathode material of a medium-temperature solid oxide fuel cell with a vacancy double perovskite structure is a metal cation deficiency, and the chemical formula is Pr 1-x Ba 1-y co 2 o 5+δ , where 0<x≤0.1, 0<y≤0.1, 0.3≤δ≤0.5.

[0014] The intermediate temperature solid oxide fuel cell vacancy double perovskite structure cathode material described in this embodiment has a chemical formula of Pr 1-x Ba 1-y co 2 o 5+δ The metal cation-deficient double perovskite powder material has the advantages of high crystallinity and strong conductivity, thus exhibiting good electrocatalytic activity.

[0015] The cathode material with a vacancy double perovskite structure for an intermediate temperature solid oxide fuel cell described in this embodiment uses vacancy ions to reduce the amount of oxygen ion adsorption, thereby increasing the polarization ability of oxygen ...

specific Embodiment approach 2

[0016] Specific embodiment 2: This embodiment is a method for preparing a cathode material with a vacant double perovskite structure for a medium-temperature solid oxide fuel cell, and the chemical formula is Pr 1-x Ba 1-y co 2 o 5+δ The metal cation-deficient double perovskite powder material is specifically completed according to the following steps:

[0017] 1. Weighing: According to the chemical formula Pr 1-x Ba 1-y co 2 o 5+δ Weigh Pr according to Pr:Ba:Co=(1-x):(1-y):2 6 o 11 、BaCO 3 , CO 3 and Co 2 o 3 ; the Pr 1-x Ba 1-y co 2 o 5+δ In 0

[0018] 2. Grinding: the Pr taken in step 1 6 o 11 、BaCO 3 , CO 3 and Co 2 o 3 Put into the mortar and grind and mix to obtain the mixed material;

[0019] 3. Calcination: calcining the mixed material obtained in step 2 at a temperature of 1100°C to 1150°C for 12h to 24h to obtain the chemical formula Pr 1-x Ba 1-y co 2 o 5+δ Double perovskite powder materials with metal cation def...

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 Pr taken in step one 6 o 11 、BaCO 3 , CO 3 and Co 2 o 3 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-15mL): 6-7g. The other specific embodiment two is the same.

[0024] Adopt following test to verify effect of the present invention:

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Abstract

The invention discloses an absent double-perovskite structured negative electrode material of a middle-temperature solid oxide fuel battery and a preparation method for the material and relates to a negative electrode material and a preparation method of the negative electrode material. The invention aims to solve the problem that the catalytic oxidation reduction reaction capacity of the conventional negative electrode material La(1-x)MnO3 of the solid oxide fuel battery is dramatically reduced under the middle-temperature condition. The absent double-perovskite structured negative electrode material of the middle-temperature solid oxide fuel battery is a metal-cation-absent double-perovskite powder material, and the chemical formula is Pr(1-x)Ba(1-y)Co2O5+sigma. The method comprises the steps of 1, weighing the materials according to the chemical formula, Pr(1-x)Ba(1-y)Co2O5+sigma; 2, performing grinding to obtain a mixture; and 3, performing sintering to obtain the metal-cation-absent double-perovskite powder material with the chemical formula of Pr(1-x)Ba(1-y)Co2O5+sigma. The preparation method disclosed by the invention is mainly used for preparing the absent double-perovskite structured negative electrode material of the middle-temperature solid oxide fuel battery.

Description

technical field [0001] The invention relates to a medium temperature solid oxide fuel cell cathode material and a preparation method thereof. Background technique [0002] 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 MnO 3 Below 1000 °C, the lower oxygen ion conductivity leads to a sharp de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50H01M4/8652
Inventor 夏天蒙富常赵辉
Owner HEILONGJIANG UNIV
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