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Anode supporting solid electrolyte compound film for solid oxide fuel battery and its preparing method

An anode-supported, solid oxide technology, used in fuel cell components, solid electrolyte fuel cells, fuel cells, etc., can solve problems such as being unsuitable for large-scale production, poor electrolyte bonding, and difficult sintering of the intermediate layer. The effect of good quality, good performance and high efficiency

Inactive Publication Date: 2007-03-07
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

In the field of solid oxide fuel cells, some studies on two-layer casting have been reported in the literature. They first cast a layer of electrolyte and then cast an anode support layer [Seungdoo Park, Raymond J.Gorte and John M.Vohs, Tape Cast Solid Oxide Fuel Cells for the Direct Oxidation of Hydrocarbons, Journal of The Electrochemical Society, 2001: A443-A444], but there is no report on the preparation of composite membranes by tape casting methods with more than three layers (including three layers) both at home and abroad , while the process of three-layer casting and co-firing and then impregnating the middle layer has an additional sintering process, the cost is relatively increased, and the impregnated middle layer is difficult to sinter, resulting in poor bonding with the electrolyte, and this This process is not suitable for large-scale production

Method used

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  • Anode supporting solid electrolyte compound film for solid oxide fuel battery and its preparing method
  • Anode supporting solid electrolyte compound film for solid oxide fuel battery and its preparing method
  • Anode supporting solid electrolyte compound film for solid oxide fuel battery and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Fabrication of Large Area Anode Supported Electrolyte Composite Membrane by Multilayer Casting Method

[0032] Take by weighing 45g8YSZ respectively to be TOSOH (commercial) 8% yttrium oxide fully stabilized zirconia, 30g domestic 3mol%Y 2 o 3 Doped tetragonal polycrystalline zirconia (3Y-TZP) and 75g NiO as black Ni 2 o 3The anode support layer mixed powder obtained by decomposing at 800°C; Weigh 20g of fully stabilized zirconia (self-made) with 9mol% scandium oxide as electrolyte powder; Weigh 20g of domestic intermediate layer powder CGO as cerium oxide doped with 20mol% gadolinium , take by weighing 22g of the mixture of the anode active layer powder NiO-SSZ, then respectively add butanone and ethanol (by 2:1 mass ratio) mixed solvent, add about 3wt% triethanolamine dispersant for the anode support layer, for the middle layer Add about 5wt% triethanolamine dispersant to the electrolyte, anode active layer, respectively, and use a planetary ball mill to mix for 1 ...

Embodiment 2

[0034] Manufacture of large-area anode-supported electrolyte composite membrane by multi-layer casting method

[0035] Cut the dried composite membrane blank into the required size and area using a porous alumina press plate-composite membrane blank-porous alumina press plate, which is similar to a "sandwich" structure and placed in a muffle furnace for co-firing, in which the porous alumina The porosity of the press plate is 50-60%, and the temperature is raised to 600°C at a rate of 30°C / h for 2 hours, then the temperature is raised to 1450°C at a rate of 120°C / h for 4 hours, and then the temperature is cooled to 700°C at a rate of 80°C / h. Lower the temperature to complete plastic discharge and sintering at one time.

Embodiment 3

[0037] Comparison of SEM photos of single cells after four-layer casting and three-layer casting + impregnated interlayer composite membrane coated with cathode for power generation

[0038] It can be seen from Figure 3 and Figure 4 that the four-layer tape-cast co-fired composite membrane is well combined with the electrolyte layer after the cathode is applied for power generation, and the sintering of the middle layer is very good, and there is basically no delamination after power generation. , while the three-layer cast + impregnated intermediate layer composite film is coated with cathode for power generation, it is obvious that the combination of the intermediate layer and the electrolyte layer is not very good. The main problem is that the intermediate layer is almost not sintered, so it cannot prevent the cathode from SSZ electrolyte. The role of the reaction between the layers, which is the main reason for the poor performance of the battery.

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Abstract

This invention relates to solid oxidation fuel battery anode supportive electrolyte compound film, which comprises the following layers: anode supportive layer by NiO-YSZ of 3mol%Y<2>O<3; anode active layer by NiO-SSZ; solid electrolyte layer of SSZ 9mol% scandium oxide with total stable zircite and middle layer of CGO mixed with 20mol% cerium oxide.

Description

technical field [0001] The invention relates to a large-area anode-supported electrolyte composite membrane for a solid oxide fuel cell (SOFC) and a preparation method of a multilayer casting method, belonging to the field of material preparation technology in solid fuel cells. Background technique [0002] SOFC is an efficient all-solid-state electrochemical energy conversion device that directly converts chemical energy into electrical energy. The power loss of its power generation is mainly concentrated in the internal resistance loss of the electrolyte material. In order to increase the current density and power density of the battery and reduce the operating temperature of the battery, while selecting a new type of electrolyte material with high conductivity, it is necessary to use a thin film preparation process for the electrolyte. As we all know, there are many preparation techniques for ceramic thin film, such as air plasma spraying (APS), electrochemical vapor dep...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M4/86H01M4/88H01M8/10H01M8/0271H01M8/1253H01M8/126
CPCY02E60/521Y02E60/50
Inventor 王绍荣曹佳弟钱继勤王振荣温廷琏
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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