Solid oxide fuel cell anode/electrolyte bilayer membrane and preparation method thereof

A solid oxide and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as the difficulty in preparing dense electrolytes, and achieve good industrialization prospects and stable structures

Inactive Publication Date: 2011-12-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to prepare ultra-thin dense electrolyte by casting method, and the thickness of the electrolyte film determines the internal resistance loss of the battery

Method used

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  • Solid oxide fuel cell anode/electrolyte bilayer membrane and preparation method thereof
  • Solid oxide fuel cell anode/electrolyte bilayer membrane and preparation method thereof
  • Solid oxide fuel cell anode/electrolyte bilayer membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029](1) 80 grams of YSZ and 20 grams of starch are added in the ball mill tank, then add 90 grams of butanone and ethanol mixed solvent and 2 grams of triethyl phosphate in a weight ratio of 2: 1, and ball mill 8 with a planetary ball mill at a speed of 300 rpm hours to mix. Add 13 grams of polyvinyl butyral, 6 grams of dibutyl phthalate, and 6 grams of polyethylene glycol 200 to the slurry mixed by ball milling, and then ball mill with a planetary ball mill at a speed of 300 rpm. Mix well for 16 hours. The above ball-milled slurry was subjected to vacuum degassing treatment for 30 minutes, and cast on a tape casting machine to form a green body of yttria-stabilized zirconia support body. The thickness of the green body support body after drying was 700 μm.

[0030] (2) dissolving ethyl cellulose in terpineol, making ethyl cellulose content is the ethyl cellulose terpineol solution of 2wt% in terpineol, to be applied to the depositing of electrolyte layer as screen printing...

Embodiment 2

[0038] (1) Co-sintering the YSZ support body green body and the electrolyte layer according to Example 1 to prepare the support body and the electrolyte layer.

[0039] (2) preparation concentration is respectively the mixed solution of lanthanum nitrate and chromium nitrate of 1 mole / liter, extracts certain solution with syringe, according to the method for embodiment 1, impregnates above-mentioned solution in the porous YSZ framework, then the matrix after impregnation is good Put it in a furnace at 250°C for half an hour to decompose the nitrates. After repeating the above operation 5 times, put it into a furnace for calcination at 800°C for 2 hours to form lanthanum chromate (LaCrO 3 ), so that the amount of lanthanum chromate reaches 10 mg / cm2. Then use the same method of Example 1 to impregnate to obtain V 2 o 5 , V 2 o 5 The amount is also required to reach 10 mg / cm2.

Embodiment 3

[0041] (1) Prepare the YSZ support body green body and ethylcellulose terpineol solution according to Example 1.

[0042] (2) Add 5 grams of YSZ powder to 6 ml of ethyl cellulose terpineol solution, grind for more than 2 hours to obtain a stable and uniform slurry, and evenly deposit the prepared electrolyte slurry on the YSZ on a screen printing machine The electrolyte layer is formed on the green support body.

[0043] (3) Co-sintering the YSZ support body green body and the electrolyte layer according to Example 1 to prepare the support body and the electrolyte layer.

[0044] (4) Carry out the deposition of the nano electrocatalyst in the framework of the porous YSZ structure according to Example 2.

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Abstract

The invention relates to a solid oxide fuel cell anode/electrolyte double-layer membrane and a preparation method thereof. The porous yttrium oxide stabilized zirconia (YSZ) anode structure thick film green body is prepared by a tape casting method, and the screen printing method is used here. Thick-film deposited electrolyte layer, co-sintered at a certain temperature to obtain a porous YSZ structure skeleton/dense electrolyte double-layer film, using the impregnation method to deposit nano-electrocatalysts on the inner and outer surfaces of the anode structure skeleton, and calcining at a lower temperature. Anode/electrolyte bilayer membrane. The advantages of the present invention are that the formed porous anode support has a long-term structural stability in a reducing atmosphere, has high electronic conductivity, can withstand multiple oxidation-reduction cycles, is resistant to carbon deposition, and has sulfur resistance. Low cost and scalable preparation process, multilayer films of various sizes can be prepared, and have good industrialization prospects.

Description

technical field [0001] The invention relates to a method in the technical field of fuel cells, in particular to a method for preparing a solid oxide fuel cell anode / electrolyte double-layer membrane. Background technique [0002] Solid Oxide Fuel Cell (Solid Oxide Fuel Cell, SOFC) is an all-solid-state power generation device that directly converts the chemical energy in the fuel into electrical energy through an electrochemical reaction. The conversion process has many advantages, among which the outstanding advantage is the wide applicability of fuel, that is, hydrogen, carbon monoxide and hydrocarbons can be used as fuel, so hydrogen, carbon monoxide, natural gas, liquefied petroleum gas, coal gas, biomass can be widely used Various hydrocarbon fuels such as gas, methanol and ethanol. Solid oxide fuel cells have a wide range of applications, and their main applications include distributed power stations, household power stations, vehicle auxiliary power supplies, uninter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 屠恒勇罗坤余晴春
Owner SHANGHAI JIAO TONG UNIV
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