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A novel solid oxide fuel cell barrier layer and its preparation method

A solid oxide and fuel cell technology, which is applied in fuel cells, circuits, electrical components, etc., can solve the adverse effects of battery performance and high resistance equal problems, and achieve the effects of easy amplification and promotion, increased contact area, and enhanced bonding strength

Active Publication Date: 2019-04-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this temperature, the barrier layer material and the electrolyte material often react or form a solid solution, resulting in a high-resistance phase, which adversely affects battery performance.
[0006] So far, there is no barrier layer with simple process, low cost, high production efficiency and high bonding strength

Method used

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  • A novel solid oxide fuel cell barrier layer and its preparation method
  • A novel solid oxide fuel cell barrier layer and its preparation method
  • A novel solid oxide fuel cell barrier layer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Y 0.16 Zr 0.92 o 2 Fabrication of substrate layer by casting-lamination-co-sintering

[0050] Will Y 0.16 Zr 0.92 o 2 100g of starch powder, 36.67g of solvent ethanol and 36.67g of methyl ethyl ketone, 8g of dispersant triethanolamine and ball milling for 24 hours; then add 17.6g of binder polyvinyl butyral, plasticizer dibutyl phthalate 11 g was mixed and ball milled for 24 hours. Vacuum defoaming for 30 minutes after the slurry is filtered, and then cast according to the required thickness to obtain a substrate layer cast film green body of 3-10 microns;

[0051] The matrix layer green body, the electrolyte green body and the anode green body are stacked in sequence, and put into a vacuum packaging bag for vacuum sealing. Put the sealed green body into an isostatic press with a water temperature of 70°C, and press it at 50MPa for 20min;

[0052] The pressed green body is cut into the required size, put into a box-type electric furnace, heated to 1400°C for ...

Embodiment 2

[0060] 1. La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 o 3-δ Silk-printing-co-sintering preparation of substrate layer

[0061] Take La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 o 3-δ , each 100g of starch powder, in 200g dehydrated ethanol medium planetary ball mill mixes 4 hours, the mixed powder obtained by drying the suspension at 80 ℃, adds the solvent prepared in advance (terpineol with ethyl cellulose content 5wt%) Solution) 100g, after mixing uniformly, make substrate layer screen printing slurry through rolling and milling;

[0062] Use a screen printing machine to print the base layer screen printing paste on the upper surface of the half-cell green body, after drying at 80°C, put the green body into a box-type electric furnace, heat it up to 1400°C for 1400 minutes, keep it warm for 4 hours, and sinter the matrix layer is deposited on the outside of the electrolyte;

[0063] 2. La 0.4 Ce 0.6 o 2-δ Spin Coating Preparation of Coating Layers

[0064] La 0.4 Ce 0.6 o 2-δ Powder 50g, s...

Embodiment 3

[0067] 1. BaZr 0.01 Ce 0.07 Y 0.02 o 3-δ Impregnation-co-sintering preparation of substrate layer

[0068] Take BaZr 0.01 Ce 0.07 Y 0.02 o 3-δ (BZCY), each 100g of starch powder, each 36.67g of solvent ethanol and butanone, 8g of dispersant triethanolamine and mixed ball mill for 24 hours; then add 17.6g of binder polyvinyl butyral, plasticizer phthalic acid 11 g of dibutyl ester was mixed and ball milled for 24 hours. Vacuum defoaming for 30 minutes after slurry filtration;

[0069] The prefabricated Ni-BZCY / BZCY tubular half-cells were completely immersed in the slurry, the cells were pulled out of the slurry after 3 min, and the process was repeated after drying in air for 30 min. After completely drying, put the battery into a box-type electric furnace, raise the temperature to 1400°C for 1400 minutes, keep it warm for 4 hours, and the matrix layer is deposited on the outside of the electrolyte;

[0070] 2. Ce 0.9 Gd 0.1 o 1.95 Dip coating preparation of coati...

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Abstract

The invention relates to a novel solid oxide fuel cell barrier layer and a production method thereof. The solid oxide fuel cell barrier layer comprises a porous substrate layer positioned on the surface of an electrolyte layer and coating layers positioned on the pore inner wall of the substrate layer and on the surface of the substrate layer, wherein the material of the substrate layer is same to that of the electrolyte layer, and the material of the coating layer is a material being different from the material of the electrolyte layer and being capable to block harmful reactions of an electrolyte and an electrode and / or block the electron conduction of the electrolyte. The coating layers are positioned on the pore inner wall of the substrate layer and on the upper surface of the substrate layer, and can block the harmful reactions of the electrolyte and the electrode and / or block the electron conduction of the electrolyte, and interlace of the substrate layer and the coating layer increases the contact area and enhances the bonding strength in the barrier layer.

Description

technical field [0001] The invention belongs to the field of solid electrochemistry and fuel cells, and relates to a novel solid oxide fuel cell (SOFC) electrode barrier layer, including tube-shaped and flat-plate SOFCs. The invention also relates to a preparation method of the novel solid oxide fuel cell barrier layer. Background technique [0002] Solid oxide fuel cell (SOFC) is a power generation device that directly converts chemical energy into electrical energy. The key to its preparation and application is a multilayer ceramic composite membrane composed of cathode, electrolyte and anode. [0003] Between the cathode / anode and the electrolyte, it is usually necessary to add an electrode barrier layer. It has two functions: one is to prevent the harmful reaction between the electrode and the electrolyte at high temperature, and to expand the selection range of the electrode and the electrolyte, such as the high-performance cathode La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1016
CPCH01M2008/1293Y02E60/50Y02P70/50
Inventor 孟燮占忠亮骆婷吴昊刘雷敏钱继勤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI