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Modified solid oxide fuel cell electrode, in-situ solvothermal preparation method thereof and solid oxide fuel cell

A fuel cell electrode, solid oxide technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of complex steps, electrode damage, long time consumption, etc., and achieve excellent electrochemical performance and polarization resistance.

Pending Publication Date: 2022-05-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solution impregnation method often requires repeated impregnation, the steps are complicated, and it needs to be sintered at a relatively high temperature after impregnation, which will cause damage to the electrode itself, consume a lot of energy, and take a long time

Method used

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  • Modified solid oxide fuel cell electrode, in-situ solvothermal preparation method thereof and solid oxide fuel cell
  • Modified solid oxide fuel cell electrode, in-situ solvothermal preparation method thereof and solid oxide fuel cell
  • Modified solid oxide fuel cell electrode, in-situ solvothermal preparation method thereof and solid oxide fuel cell

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preparation example Construction

[0070] The invention provides a method for preparing a modified solid oxide fuel cell electrode, which is characterized in comprising the following steps:

[0071] 1) After mixing the metal salt solution and the pH regulator, a precursor reaction solution is obtained;

[0072] 2) placing the solid oxide fuel cell or the electrode of the solid oxide fuel cell in the precursor reaction solution obtained in the above steps, and vacuumizing to obtain a reaction system;

[0073] 3) Put the reaction system obtained in the above steps into a reaction device, and perform a solvothermal reaction to obtain a modified solid oxide fuel cell electrode.

[0074] In the present invention, the selection, composition and structure of the materials in the above preparation method, as well as the corresponding optimization principles, can preferably correspond to the selection, composition and structure, and the corresponding optimization principles of the aforementioned modified solid oxide fue...

Embodiment 1

[0107] (1) 0.25g of Ce(NO 3 ) 3 ·6H 2 O was dissolved in 30 mL of ethylene glycol, then 1 mL of deionized water and 1 mL of propionic acid were added, and stirred until the solid was completely dissolved to obtain the solution required for solvothermal;

[0108] (2) Put the symmetric battery with the structure of LSCF / GDC / YSZ / GDC / LSCF prepared in advance into the lining of 50mL polytetrafluoroethylene, and slowly pour the solution in step (1) into the polytetrafluoroethylene In the lining, the battery is completely submerged in the solution, and then evacuated to -30k Pa;

[0109] (3) Transfer the polytetrafluoroethylene lining in step (2) to a stainless steel hydrothermal reaction kettle, and seal the reaction kettle tightly. Put the reaction kettle in an oven and raise the temperature to 150°C ~ 180°C, and keep it warm for 4 hours, CeO 2 Nanoparticles will grow in situ on the surface of the LSCF electrode;

[0110] (4) Take the symmetrical battery out of the solution, w...

Embodiment 2

[0119] (1) 0.25g of Ce(NO 3 ) 3 ·6H 2 O, 0.0284g Sm(NO 3 ) 3 ·6H 2 O was dissolved in 30 mL of ethylene glycol, then 1 mL of deionized water and 1 mL of propionic acid were added, and stirred until the solid was completely dissolved to obtain the solution required for solvothermal;

[0120] (2) Put the symmetric battery with the structure of LSCF / GDC / YSZ / GDC / LSCF prepared in advance into the lining of 50mL polytetrafluoroethylene, and slowly pour the solution in step (1) into the polytetrafluoroethylene In the lining, the battery is completely submerged in the solution, and then evacuated to -30k Pa;

[0121] (3) Transfer the polytetrafluoroethylene lining in step (2) to a stainless steel hydrothermal reaction kettle, and seal the reaction kettle tightly. Place the reaction kettle in an oven and heat up to 180°C, and keep it warm for 2 hours, Sm 0.1 Ce 0.9 o 2 Nanoparticles will grow in situ on the surface of the LSCF electrode;

[0122] (4) Take the symmetrical batt...

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Abstract

The invention provides a modified solid oxide fuel cell electrode. The modified solid oxide fuel cell electrode comprises a solid oxide fuel cell electrode and modified phase nanoparticles compounded on the solid oxide fuel cell electrode, the material of the modified phase nanoparticles comprises one or more of a single metal oxide, a doped metal oxide and a perovskite type catalytic material. According to the invention, a solvothermal method is adopted for modification, in-situ growth of modified phase nanoparticles is carried out on the surface of the solid oxide fuel cell, and a modified electrode with a specific microstructure and structure is obtained. The polarization impedance of the modified electrode is obviously reduced, the output power of the cell is obviously improved, and the preparation method is simple in process, easy to operate, good in morphology controllability, low in reaction temperature and low in energy consumption, and is a preparation method of the in-situ modified solid oxide fuel cell electrode with relatively high feasibility.

Description

technical field [0001] The invention belongs to the technical field of solid oxide fuel cell electrodes, and relates to a modified solid oxide fuel cell electrode and a preparation method thereof, and a solid oxide fuel cell, in particular to a modified solid oxide fuel cell electrode and an in-situ solvent thereof Thermal preparation methods, solid oxide fuel cells. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, referred to as SOFC) is a third-generation fuel cell, which is an all-solid-state chemical energy that converts chemical energy stored in fuel and oxidant into electrical energy efficiently and environmentally friendly at medium and high temperatures. Power generation device, its high efficiency, no pollution, all-solid structure and wide adaptability to a variety of fuel gases, etc., are the basis for its wide application. Among all fuel cells, SOFC has the highest operating temperature and is a high-temperature fuel cell. In recent y...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/86H01M4/88H01M8/126
CPCH01M8/126H01M4/9016H01M4/8652H01M4/8882H01M2008/1293H01M4/861
Inventor 蔡东民杨钧官万兵王建新
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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