Mica based electrolyte membrane for solid oxide fuel cell and preparation method thereof

A solid oxide, fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve problems such as high-efficiency conduction of unfavorable oxygen ions, electrode microstructure damage, battery side reactions, etc.

Inactive Publication Date: 2018-07-06
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Working at such a high temperature for a long time will cause side reactions between the various component materials of the battery, and the electrode microstructure will be damaged due to sintering, etc.
In addition, the high operating temperature makes the optional materials of solid oxide fuel cell components very limited, and relatively low-cost sealing and electrode materials cannot be used
[0003] The use of a thinner electrolyte membrane can achieve the conduction efficiency of oxygen ions at a lower temperature. The formation of the existing electrolyte membrane is usually made by slurrying the electrolyte in the form of particles, and forming a film by casting, screen printing, etc., and the obtained electrolyte The thickness of the film is usually greater than 10 μm, which is not conducive to the efficient conduction of oxygen ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix 100g of cetyltrimethylammonium bromide and 200g of mica powder evenly, and heat-treat at 40°C for 5 hours; (2). Use 30 MHz ultrasonic treatment to process the product after heat treatment in step (1), and ultrasonically treat it The time is 4h; the product after ultrasonic treatment is fired at 400°C for 180min to obtain two-dimensional nano-mica; (3). After mixing the YSZ electrolyte precursor and the prepared two-dimensional nano-mica in a ratio of 3:1, use 0.5Mpa pressure spray deposition onto the anode base surface of NiO-YSZ electrode; (4). Use 105 W / cm 2 The deposited film obtained in the laser treatment step (3) is obtained to obtain a mica-based ultra-thin electrolyte film. The electrical conductivity is detailed in Table 1.

Embodiment 2

[0033] (1) Mix 100g of cetyltrimethylammonium bromide and 200g of mica powder evenly, and heat treat at 60°C for 4 hours; (2). Use 30 MHz ultrasonic treatment to process the product after heat treatment in step (1), and ultrasonically treat it The time is 3h; the product after ultrasonic treatment is fired at 500°C for 120min to obtain two-dimensional nano-mica; (3). After mixing the ScSZ electrolyte precursor solution with the prepared two-dimensional nano-mica in a ratio of 4:1, use 0.6Mpa pressure spray deposition onto the NiO-YSZ electrode anode base surface; (4). Use 104 W / cm 2 The deposited film obtained in the laser treatment step (3) is obtained to obtain a mica-based ultra-thin electrolyte film. The electrical conductivity is detailed in Table 1.

Embodiment 3

[0035] (1) Mix 200g of cetyltrimethylammonium bromide and 200g of mica powder evenly, and heat treat at 40°C for 5 hours; (2). Use 30 MHz ultrasonic treatment to process the product after heat treatment in step (1). The time is 4h; the product after ultrasonic treatment is fired at 400°C for 180min to obtain two-dimensional nano-mica; (3). After mixing the YSZ electrolyte precursor and the prepared two-dimensional nano-mica in a ratio of 3:1, use 0.5Mpa pressure spray deposition onto the anode base surface of NiO-YSZ electrode; (4). Use 105 W / cm 2 The deposited film obtained in the laser treatment step (3) is obtained to obtain a mica-based ultra-thin electrolyte film. The electrical conductivity is detailed in Table 1.

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Abstract

The invention relates to the field of electrolyte membrane materials, and specifically relates to a mica based electrolyte membrane for a solid oxide fuel cell and a preparation method thereof. The preparation method comprises the following steps: (1) uniformly mixing cetyltrimethylammonium bromide and sericite powder; and thermally processing for 3-5h under the temperature of 40-80 DEG C; (2) processing the product obtained in step (1) through 20-30MHz ultrasonic wave for 1-4h; and roasting the product obtained in ultrasonic processing for 30-180min under the temperature of 400-800 DEG C to obtain two-dimensional nano mica; (3) mixing the precursor liquid of electrolyte and the two-dimensional nano mica; and spraying to deposit on the anode surface of an electrode under the temperature of0.5-0.8MPa; and (4) processing the deposited membrane obtained in step (3) with laser to obtain the mica based ultra-thin electrolyte membrane. The electrolyte membrane has the thickness at nanometerlevel, and is outstanding in oxygen ion transfer performance.

Description

technical field [0001] The invention relates to the field of electrolyte membrane materials, in particular to a mica-based electrolyte membrane for solid oxide fuel cells and a preparation method thereof. Background technique [0002] Solid oxide fuel cells (solid oxide fuel cells, SOFCs) have high efficiency and excellent long-term performance stability, without catalysts, and can greatly reduce system costs. Since solid oxide is used as the electrolyte, it has no problems such as electrolyte corrosion; the fuel has wide adaptability, and hydrogen, CO, natural gas (methane), coal vapor, hydrocarbons, etc. can be used as fuel. Most of the existing solid oxide fuel cells still use the traditional yttria-stabilized zirconia (YSZ) as the electrolyte, and the working temperature is 750 ° C to 1000 ° C. Working at such a high temperature for a long time will cause side reactions between the various component materials of the battery, and the electrode microstructure will be dama...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016
CPCH01M8/1016Y02E60/50
Inventor 陈庆曾军堂
Owner CHENDU NEW KELI CHEM SCI CO LTD
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