Perovskite type medium-temperature solid oxide fuel cell nanofiber cathode material and preparation method thereof

A solid oxide and fuel cell technology, applied in solid electrolyte fuel cells, battery electrodes, nanotechnology for materials and surface science, etc., can solve the problem of unfavorable oxygen ion and electron transport, low specific surface area, and small gas contact area and other issues, to achieve the effect of increasing the specific surface area, promoting catalytic activity, and increasing the three-phase interface

Inactive Publication Date: 2020-09-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional electrode materials mostly use a stacked structure of micron particles, which has a low specific surface area and a small contact area with gas, and cannot efficiently complete the reaction to oxygen molecules, and there is a contact resistance between micron particles, which is not conducive to oxygen ions and electrons. transmission

Method used

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  • Perovskite type medium-temperature solid oxide fuel cell nanofiber cathode material and preparation method thereof
  • Perovskite type medium-temperature solid oxide fuel cell nanofiber cathode material and preparation method thereof
  • Perovskite type medium-temperature solid oxide fuel cell nanofiber cathode material and preparation method thereof

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Embodiment 1

[0027] The B site of the perovskite-type intermediate temperature solid oxide fuel cell nanofiber cathode material of the present invention is doped with Co element and Fe element, and its chemical formula is YCo x Fe 1-x o 3 (YCF), wherein, x=0.5, the surface of the perovskite-type intermediate temperature solid oxide fuel cell nanofiber cathode material is smooth.

[0028] The preparation method of the perovskite type intermediate temperature solid oxide fuel cell nanofiber cathode material of the present invention comprises the following steps:

[0029] According to YCo x Fe 1-x o 3 The stoichiometric ratio of Y(NO 3 ) 3 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O was mixed, then mixed with dimethylformamide (abbreviated as DMF, AR analytically pure) and polyvinylpyrrolidone (abbreviated as PVP, molecular weight ≈130000, purity 99.99%) and magnetically stirred for 24 hours to form a uniform and stable dark red sol, and then Inhale the sol through a syr...

Embodiment 2

[0038] The perovskite-type medium-temperature solid oxide fuel cell nanofiber cathode material of the present invention, the B-site of the perovskite-type medium-temperature solid oxide fuel cell nanofiber cathode material is doped with Co element and Fe element, and its chemical formula is YCo x Fe 1-x o 3 , wherein, x=0.01, the surface of the perovskite-type intermediate temperature solid oxide fuel cell nanofiber cathode material is smooth.

[0039] The preparation method of the perovskite type intermediate temperature solid oxide fuel cell nanofiber cathode material of the present invention comprises the following steps:

[0040] According to the stoichiometric ratio of the nanofibrous cathode material of the perovskite-type intermediate temperature solid oxide fuel cell, the Y(NO 3 ) 3 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O for mixing, then add dimethylformamide and polyvinylpyrrolidone, mix and magnetically stir evenly to form a uniform and stable ...

Embodiment 3

[0045] The perovskite-type medium-temperature solid oxide fuel cell nanofiber cathode material of the present invention, the B-site of the perovskite-type medium-temperature solid oxide fuel cell nanofiber cathode material is doped with Co element and Fe element, and its chemical formula is YCo x Fe 1-x o 3 , wherein, x=0.99, the perovskite-type intermediate temperature solid oxide fuel cell nanofiber cathode material has a smooth surface and a diameter of 300-400nm.

[0046] The preparation method of the perovskite type intermediate temperature solid oxide fuel cell nanofiber cathode material of the present invention comprises the following steps:

[0047] According to the stoichiometric ratio of the nanofibrous cathode material of the perovskite-type intermediate temperature solid oxide fuel cell, the Y(NO 3 ) 3 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O and Fe(NO 3 ) 3 9H 2 O for mixing, then add dimethylformamide and polyvinylpyrrolidone, mix and magnetically stir evenly to fo...

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Abstract

The invention discloses a perovskite type medium-temperature solid oxide fuel cell nanofiber cathode material and a preparation method thereof. The B-site of the perovskite type medium-temperature solid oxide fuel cell nanofiber cathode material is doped with an element Co and an element Fe, and the chemical formula of the material is YCoxFe<1-x>O3, wherein x is more than 0 and less than 1. The perovskite type medium-temperature solid oxide fuel cell nanofiber cathode material is smooth in surface, the diameter is 300-400nm, the specific surface area of the cathode material is large, the contact area with gas is large, and the reaction with oxygen molecules can be efficiently completed. Meanwhile, the transmission of oxygen ions and electrons is facilitated, and the preparation method is relatively simple at the same time.

Description

technical field [0001] The invention belongs to the technical field of solid oxide fuel cells, and relates to a perovskite-type medium-temperature solid oxide fuel cell nanofiber cathode material and a preparation method thereof. Background technique [0002] Solid oxide fuel cell (SOFC) is an all-solid component energy conversion device that directly converts the chemical energy of fuel gas (hydrogen, methane, etc.) into electrical energy. It has outstanding advantages such as high energy conversion efficiency, environmental friendliness, and no pollution. It has become a high-profile new energy technology. Traditional SOFCs generally work at high temperatures (above 1 000 °C), but high temperatures limit the application of battery materials and battery materials are expensive, and they are prone to aging after long-term operation, making them face many difficulties in application. Therefore, the exploration of medium-temperature fuel cells And application (550 ~ 700 ℃) is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M8/10D01D5/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00D01D5/0015D01D5/0069H01M4/9016H01M8/10Y02E60/50
Inventor 周峻吴锴杨甲铭王俊凯
Owner XI AN JIAOTONG UNIV
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