Carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode and preparation method thereof

A solid oxide and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of cumbersome and repetitive impregnation methods, poor catalytic activity, and low electrocatalytic activity, and achieve excellent anti-carbon deposition and anti-sulfur poisoning , good structural stability, high electrocatalytic activity

Inactive Publication Date: 2019-07-26
CHANGSHU INSTITUTE OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic activity of Cu for fuel oxidation is worse than that of Ni, and CuO x With a low melting point (1326°C), it is difficult to prepare Cu-based anodes by oxide blending, sintering and reduction
Although copper-based anodes and cerium-based anodes have good anti-carbon deposition and anti-sulfur poisoning effects, they have low electrocatalytic activity or low elec

Method used

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  • Carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode and preparation method thereof
  • Carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode and preparation method thereof
  • Carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0025] Example 1

[0026] Dissolve cerium nitrate, samarium nitrate and copper nitrate in deionized water to prepare a 1.0M nitrate solution, in which the molar ratio of cerium ion to samarium ion is 4:1, and the molar content of copper ion in all metal ions is 10%. Then, glycine is added to the nitrate solution, wherein the molar ratio of glycine to nitrate in the solution is 1:2. Stir evenly at room temperature, heat it on an electric stove, and concentrate until spontaneous combustion to obtain light brown powder. Then heat treatment at 700℃ for 4h to obtain a light brown-yellow CSCO (copper-samarium co-doped cerium oxide) powder. The cross-sectional scanning electron microscope picture of the powder is figure 1 Shown.

[0027] The prepared CSCO powder was ball milled for 72 hours with alcohol as the ball milling medium, and then vacuum dried at 60°C for 24 hours. The ball-milled powder and polystyrene monodisperse microspheres with a particle size of 0.3 μm were ultrasonicall...

Example Embodiment

[0030] Example 2

[0031] Dissolve cerium nitrate, gadolinium nitrate and copper nitrate in deionized water to prepare a 1.0M nitrate solution. The molar ratio of cerium ions to gadolinium ions is 4:1, and the molar content of copper ions in all metal ions is 10%. Then the aminoacetic acid is added to the nitrate solution, wherein the molar ratio of the aminoacetic acid to the nitrate in the solution is 1:2. Stir evenly at room temperature, heat it on an electric stove, and concentrate until spontaneous combustion to obtain a light brown powder. Then heat treatment at 800° C. for 5 hours to obtain light brown-yellow CGCO (copper-gadolinium co-doped cerium oxide) powder.

[0032] The prepared CGCO powder was ball milled for 72 hours with alcohol as the ball milling medium, and then vacuum dried at 50° C. for 48 hours. The vacuum-dried powder and ethyl cellulose were ultrasonically mixed in an alcohol medium at a mass ratio of 9:1 for 6 hours, and then vacuum dried at 50°C for 48 h...

Example Embodiment

[0034] Example 3

[0035] Dissolve cerium nitrate, samarium nitrate and copper nitrate in deionized water to prepare a 0.5M nitrate solution. The molar ratio of cerium ions to samarium ions is 4:1, and the molar content of copper ions in all metal ions is 5%. Then stearic acid is added to the nitrate solution, where the molar ratio of stearic acid to nitrate in the solution is 2:1. Stir evenly at room temperature, heat it on an electric stove, and concentrate until spontaneous combustion to obtain a light brown powder. Then heat treatment at 500°C for 8h to obtain light brown-yellow CSCO powder.

[0036] The prepared CSCO powder was ball milled for 96 hours with acetone as the ball milling medium, and then vacuum dried at 70°C for 12 hours. The ball-milled powder and polystyrene monodisperse microspheres with a particle size of 0.3 μm were ultrasonically mixed in an acetone medium at a mass ratio of 6:1 for 1 hour, and then vacuum dried at 70°C for 24 hours. Put 0.45g of the pow...

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Abstract

The invention discloses a carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode and a preparation method thereof. Copper and samarium co-doped cerium oxide orcopper gadolinium co-doped cerium oxide powder is prepared by preparation of copper ions and samarium or gadolinium doped cerium oxide-based oxide, doped cerium oxide powder is used as precursor powder to prepare porous ceramic, a part of copper is permeated from lattices to obtain the carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode after hydrogen reduction on the porous ceramic. The conductivity of the positive electrode is improved, the three-phase reaction interface of the positive electrode is added, the carbon-resistant and sulfur poisoning-resistant solid-state oxide fuel cell positive electrode has favorable structure stability and excellent carbon-resistant and sulfur poisoning-resistant performance, and agglomeration can be prevented.According to the preparation method, copper is introduced to the positive electrode by ion doping and desolvation effect, a positive electrode-supported solid-state oxide fuel cell can be directly prepared by a traditional pressing or curtain coating and sintering method, the complicated process of the copper-containing positive electrode prepared by an impregnation reduction method is prevented,and the industrialization implementation becomes probable.

Description

technical field [0001] The invention relates to a fuel cell anode and a preparation method thereof, in particular to an anti-carbon deposition and anti-sulfur poisoning solid oxide fuel cell anode and a preparation method thereof. Background technique [0002] Fuel cell technology can directly convert the chemical energy of the fuel into electrical energy through the electrochemical reaction process, which can greatly reduce pollution, and because it is not limited by the Carnot cycle, its energy utilization rate can reach 40% to 60%. At the same time, by utilizing its thermal energy, the conversion rate of energy can be as high as more than 80%. These advantages make fuel cell technology very likely to become an important means of power supply in the near future. The final product of fuel cells using hydrogen as the optimal fuel is water, which has little pollution to the environment. However, there are many problems to be solved in the acquisition, storage and transporta...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/88H01M4/8875H01M4/8885H01M4/9016H01M4/9041Y02E60/50
Inventor 王志成张波陈鹏刘冠鹏苏建刚杨沛霖陶石张惠国钱斌冯金福
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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