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Method for preparing a high-performance slab solid oxide fuel single battery

A solid oxide and single-cell technology, which is applied in the direction of solid electrolyte fuel cells and fuel cell components, can solve the problems of unguaranteed interface contact reliability, large interface contact resistance, and large differences between different batteries, so as to prevent The effect of the failure of the electrolyte diaphragm, the reduction of the interface contact resistance, and the half of the preparation time

Active Publication Date: 2013-12-25
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

Compared with co-sintering, the interfacial contact resistance after secondary sintering is often also very large, especially at low temperatures; the second preparation method is screen printing, that is, screen printing on the "electrode / electrolyte" composite green body Print another electrode material, and finally co-sinter together to obtain a single cell or a single cell skeleton. Researchers such as Shanghai Jiaotong University in China and the University of Pennsylvania in the world initially used this method to prepare single cells. This method can be used to a certain extent. To reduce the interface contact resistance, but the process is more complicated, and the yield is very low
The third preparation method is the film pasting method, which refers to pasting another electrode casting film on the "supporting electrode / electrolyte" composite body. Although this pasting method can prepare a single cell and has a high yield, it does not The reliability of the interface contact cannot be guaranteed, and the difference between different batteries is also very large, and there is also a large gap between the battery performance and its theoretical value

Method used

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  • Method for preparing a high-performance slab solid oxide fuel single battery
  • Method for preparing a high-performance slab solid oxide fuel single battery
  • Method for preparing a high-performance slab solid oxide fuel single battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Battery Structure I: "Porous Electrolyte / Dense Electrolyte / Porous Electrolyte" Structure

[0060] Weigh an appropriate amount of commercial powder LSGM (lanthanum strontium gallium magnesium), use alcohol and methyl ethyl ketone as a solvent, add an appropriate amount of additives to prepare a slurry suitable for casting, and cast an LSGM electrolyte body; weigh an appropriate amount of commercial Powder LSGM (lanthanum strontium gallium magnesium), pore-forming agent, use alcohol and methyl ethyl ketone as solvents, add appropriate amount of additives, prepare slurry suitable for casting, and cast LSGM porous electrode body; weigh an appropriate amount of high temperature flammable Using alcohol and methyl ethyl ketone as solvents, adding appropriate amount of additives to prepare a slurry suitable for casting, and casting to obtain a composite film blank. A "porous electrolyte / dense electrolyte" support body was obtained by superimposing three layers of porous electro...

Embodiment 2

[0063] Cell Structure II: "Cathode Support / Dense Electrolyte / Anode" Structure

[0064] Weigh an appropriate amount of commercial powder LSM (strontium-doped lanthanum manganate) and NiO, use alcohol and methyl ethyl ketone as a solvent, add an appropriate amount of additives to prepare a slurry suitable for casting, and cast the LSM / NiO cathode support. Electrode body: Weigh an appropriate amount of commercial powder 8YSZ (8% yttrium fully stabilized zirconia), use alcohol and methyl ethyl ketone as solvents, add appropriate amount of additives to prepare a slurry suitable for casting, and cast to obtain 8YSZ electrolyte Green body: Weigh an appropriate amount of commercial powder 8YSZ (8% yttrium fully stabilized zirconia) and NiO, use alcohol and methyl ethyl ketone as solvents, add appropriate amount of additives to prepare a slurry suitable for casting, and cast to obtain an anode Green body: Weigh an appropriate amount of high-temperature combustible powder carbon powder,...

Embodiment 3

[0066] Cell Structure III: "Anode Support / Dense Electrolyte / Porous Electrolyte" Structure

[0067] Weigh an appropriate amount of commercial powder 8YSZ (8% yttrium fully stabilized zirconia) and NiO, use alcohol and methyl ethyl ketone as a solvent, add an appropriate amount of additives to prepare a slurry suitable for casting, and cast to obtain YSZ / NiO support Body electrode body; Weigh an appropriate amount of commercial powder 8YSZ (8% yttrium fully stabilized zirconia), use alcohol and methyl ethyl ketone as solvents, add appropriate amount of additives to prepare a slurry suitable for casting, and cast to obtain 8YSZ Electrolyte green body; weigh an appropriate amount of commercial powder SSZ (10% scandium fully stabilized zirconia), pore-forming agent, use alcohol and methyl ethyl ketone as solvents, add appropriate amount of additives, and prepare a slurry suitable for casting. The porous electrolyte body is obtained by stretching; an appropriate amount of high-tempe...

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Abstract

The invention relates to a method for preparing a high-performance slab solid oxide fuel single battery. The preparation method comprises: a support electrode diaphragm and an electrolyte diaphragm are overlapped and are subjected to hot pressing under a vacuum condition so as to form a first complex diaphragm; a non-support electrode diaphragm and a complex diaphragm are overlapped and then are subjected to hot pressing so as to form a second complex diaphragm; one side of an electrolyte of the first complex diaphragm and one side of the non-support electrode of the second complex diaphragm are overlapped in a contact manner so as to form a single battery blank; the single battery blank is sintered so as to manufacture a single battery, wherein the complex diaphragm is burnt out during the sintering process, a anode diaphragm is formed by the support electrode diaphragm and a cathode diaphragm is formed by the non-support electrode diaphragm, or the cathode diaphragm is formed by the support electrode diaphragm and the anode diaphragm is formed by the non-support electrode diaphragm; the complex diaphragm is prepared from substances which can be burnt out at a temperature of 200-1450 DEG C.

Description

technical field [0001] The invention relates to a preparation method of a high-performance flat solid oxide fuel single cell, and belongs to the field of energy materials. Background technique [0002] Solid oxide fuel cell (SOFC) is a device that can directly convert fuel chemical energy into electrical energy, with high energy conversion efficiency (over 85% overall efficiency) and wide fuel adaptability (available fuels include Hydrogen, natural gas, syngas, liquid hydrocarbon fuel), no need for precious metal catalysts, safety and no pollution, etc., it has a wide range of application prospects in the fields of large power stations, distributed power sources and household cogeneration. [0003] SOFCs are classified according to their working temperature and can be divided into three types: high temperature (800-1000℃), medium and high temperature (600-800℃) and low temperature (<600℃). The current mainstream SOFC operating temperature is generally between 700-800 ℃, ...

Claims

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Application Information

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IPC IPC(8): H01M8/10H01M8/02
CPCY02E60/50
Inventor 韩达王绍荣占忠亮袁春周真一李军良刘亚迪骆婷
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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