Method for preparing ceramic composite membrane of proton conduction type solid oxide pool through water-based tape casting

A solid oxide and ceramic composite membrane technology, which is applied in fuel cells, final product manufacturing, electrochemical generators, etc., can solve the problem of unstable reaction between barium cerate and barium zirconate proton conductors, low electrolyte density, and electrical conductivity. Low-level problems, to achieve the effect of no pollution to the environment, good uniformity, and high energy conversion rate

Pending Publication Date: 2022-02-15
NANJING UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0005] Chen Dengjie, Shang Zhenxi and others applied for a patent in 2016 "Proton conduction low-temperature solid oxide battery with integrated components and its preparation", the publication number is CN105762391A, but the preparation method adopts dry pressing method to prepare electrolyte-supported battery, and electrolyte causes The slightly lower density and increased thickness also bring about the impact of increased impedance
[0006] Since then, Liu Qi, Liu Zhi and others have applied for a patent "a five-layer structure single cell and its preparation method and its products" in 2020. The publication number is CN111384421A, trying to use deionized water as the hydrogen electrode slurry. solvent, but the use of organic solvents in the electrolyte slurry still cannot completely solve the pollution problem in the preparation process, and the barium cerate and barium zirconate proton conductors used in this invention still have the problems of instability and low conductivity during reaction. problem, so it's not a good choice

Method used

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  • Method for preparing ceramic composite membrane of proton conduction type solid oxide pool through water-based tape casting
  • Method for preparing ceramic composite membrane of proton conduction type solid oxide pool through water-based tape casting

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preparation example Construction

[0038] The specific preparation method comprises the following process steps:

[0039] Step 1: Proportionally mix the first ceramic powder mixture, deionized water, starch pore-forming agent, polyacrylic acid dispersant, diluted ammonia water, polyvinyl alcohol binder, polyethylene glycol-200 and glycerin plasticizer, 1 - Octanol defoamer and 2,4,7,9-tetramethyl-5-decyne-4,7-diol surfactant were added into a ball mill tank, and ball milling was carried out to mix uniformly to obtain a hydrogen electrode slurry. The first ceramic powder mixture includes nickel oxide and proton conductor ceramic powder;

[0040] The mass ratio of each component is: the first ceramic powder mixture: deionized water: dispersant: binder: plasticizer: surfactant: defoamer=1: (0.5~1.6): (0.015~0.03 ):(0.03~0.1):(0.06~0.3):(0.01~0.05):(0.005~0.02), the mass ratio of nickel oxide and proton conductor ceramic powder in the first ceramic powder mixture is 6:4,

[0041] In another solution, the hydrogen...

Embodiment 1

[0049] Weigh 0.2 and 36 grams of NiO powder and 10 and 24 grams of BZCYYb powder for the electrolyte and hydrogen electrode slurry, respectively. The hydrogen electrode slurry needs to add 6 grams of starch as a pore-forming agent, and add 15 and 15 grams of the electrolyte and hydrogen electrode slurry respectively. 33ml deionized water, 2% and 2.5% polyacrylic acid and a small amount of ammonia water as dispersant, add 3.9% and 9% polyvinyl alcohol binder, 3.23% and 13.8% polyethylene glycol-200, 3.23% and 13.8% glycerin Plasticizer, 0.8% and 1.5% 1-octanol antifoam, 4.2% and 1.16% 2,4,7,9-tetramethyl-5-decyne-4,7-diol surfactant, put In a planetary ball mill, ball mill at 400 rpm for 3.5 hours to mix evenly; after vacuum degassing treatment, adjust the knife height on the casting machine, and cast layer by layer to make a composite film blank; dry at room temperature for 24 hours , cut it into square pieces with an area of ​​80×80mm, and after removing the composite film bl...

Embodiment 2

[0054] In the middle of the electrolyte and hydrogen electrode layers in Example 1, an active layer is added, and the mass ratio of NiO to BZCYYb is 5:5, that is, three-layer composite casting. After co-firing, a half-cell with a structure of hydrogen electrode support layer / hydrogen electrode active layer / electrolyte layer is obtained, and other steps are consistent with Example 1.

[0055] The invention relates to a method for preparing a hydrogen electrode-supported proton conductor electrolyte composite membrane. Since the hydrogen electrode support is used, the electrolyte formed by water-based casting has a large area and a small thickness, and there is no pollution to the environment during the preparation process. After sintering The density of the electrolyte is higher, and its electrochemical performance and stability are improved.

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Abstract

The invention discloses a method for preparing a ceramic composite membrane of a proton conduction type solid oxide pool through water-based tape casting, and belongs to the field of preparation of high-temperature fuel cells and electrolytic pools. A water-based tape casting method is used, a proton conductor material is used as an electrolyte, a dispersing agent, a binding agent, a plasticizer and the like are added into ceramic powder, then ball milling is performed to obtain uniform tape casting slurry, a hydrogen electrode layer and an electrolyte layer are subjected to composite tape casting to form a biscuit, and after drying, the co-sintering is performed to obtain the ceramic composite membrane of the proton conduction type solid oxide pool, wherein the area of the ceramic composite membrane is 80 * 80 mm. The electrolyte layer is compact and free of pores, and has a thickness of about 12 [mu]m. A water-based tape casting method is adopted, the preparation method is harmless to the environment and human bodies, the preparation cost is reduced, and the proton conduction type solid oxide pool preparation method which is stable, environmentally friendly, reliable and easy to operate is formed.

Description

technical field [0001] The invention belongs to the technical field of manufacturing solid oxide fuel cells / solid oxide electrolytic cells, and relates to a proton-conductive composite membrane supported by a hydrogen electrode and a preparation method thereof, specifically a water-based tape-casting preparation of a proton-conductive solid Ceramic Composite Membrane Method for Oxide Pools. Background technique [0002] Solid oxide fuel cells (Solid Oxide Fuel Cells, SOFCs) and solid oxide electrolysis cells (Solid Oxide Electrolysis cells, SOECs) are collectively referred to as solid oxide cells (Solid Oxide Cells, SOCs), which are currently the most efficient electrochemical energy conversion One of the techniques. SOFCs convert chemical energy into electrical energy, and the conversion efficiency of cogeneration is as high as 90% (power generation); SOECs can convert cheap electrical energy or thermal energy generated by renewable energy such as wind energy and solar ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622C04B35/638H01M8/1246H01M8/1253H01M8/126
CPCC04B35/50C04B35/62218C04B35/638H01M8/126H01M8/1246H01M8/1253C04B2235/3215C04B2235/3244C04B2235/3279C04B2235/6025C04B2235/6562C04B2235/6567C04B2235/6565Y02E60/50Y02P70/50
Inventor 周娟冷志忠白虎
Owner NANJING UNIV OF SCI & TECH
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