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Composite YSZ electrolyte for solid oxide fuel cell and preparation method of composite YSZ electrolyte

A solid oxide, fuel cell technology, used in fuel cells, circuits, electrical components, etc., can solve problems such as instability and limited electrode gas transmission, and achieve the effects of increasing output power, reducing ohmic resistance, and expanding interface area

Active Publication Date: 2018-08-17
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the practical application of electrode-supported SOFC, such as instability in redox atmosphere, limited gas transport inside the electrode, etc.

Method used

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  • Composite YSZ electrolyte for solid oxide fuel cell and preparation method of composite YSZ electrolyte
  • Composite YSZ electrolyte for solid oxide fuel cell and preparation method of composite YSZ electrolyte

Examples

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preparation example Construction

[0028] The preparation process of the YSZ electrolyte casting sheet in the present invention is as follows: first mix the YSZ (yttria stabilized zirconia) powder with triethanolamine, and then dissolve it in alcohol and xylene in a mass ratio of 1:1 to 3:1. Ball mill the mixed solution to form a slurry; add organic additives to the slurry, and add alcohol and xylene to continue ball milling; then put the YSZ slurry in a vacuum pump for vacuum defoaming treatment for 10-60 minutes; finally, after defoaming The YSZ slurry is cast on the polyester film, and it is dried at room temperature for 1 to 2 days to obtain the YSZ electrolyte cast sheet;

[0029] Wherein the organic additive is one or more of polyvinyl butyral, polyethylene glycol, dibutyl phthalate and the like.

[0030] In a further solution, the pressure of the tablet press described in step (3) is 20-100 MPa, and the holding time is 5-10 minutes.

[0031] In a further solution, the calcination temperature in step (4)...

Embodiment 1

[0033] The preparation method of composite YSZ electrolyte, it comprises the following steps:

[0034] (1) Preparation of YSZ electrolyte casting sheet by casting method:

[0035] (2) Through laser micromachining technology, a batch of YSZ electrolyte casting sheets is cut and processed into square through holes arranged in a 4×4 array. The side length of the square through holes is 0.8mm, and the distance between adjacent through holes is 2.26. mm, as the first YSZ casting sheet; the area of ​​the square through hole accounts for 10% of the area of ​​the first YSZ casting sheet.

[0036] The upper and lower surfaces of another batch of YSZ electrolyte casting sheets are processed into circular grooves arranged in an array as the second YSZ casting sheet;

[0037] (3) Place the first YSZ casting sheet, the second YSZ casting sheet and the first YSZ casting sheet together in order, and then pressurize to 50MPa on the tablet machine and keep the pressure for 8min to prepare the...

Embodiment 2

[0040] The preparation method of composite YSZ electrolyte, it comprises the following steps:

[0041] (1) Preparation of YSZ electrolyte casting sheet by casting method:

[0042] (2) Through laser micromachining technology, a batch of YSZ electrolyte casting sheets is cut and processed into 6×6 square through-holes arranged in an array. The side length of the square through-holes is 0.8mm, and the distance between adjacent through-holes is 1.04. mm, as the first YSZ casting sheet; the area of ​​the square through hole accounts for 23% of the area of ​​the first YSZ casting sheet.

[0043] The upper and lower surfaces of another batch of YSZ electrolyte casting sheets are processed into circular grooves arranged in an array as the second YSZ casting sheet;

[0044] (3) The first YSZ casting sheet, the second YSZ casting sheet and the first YSZ casting sheet are stacked together in sequence, and then pressurized to 20MPa on the tablet press for 10 minutes to prepare the YSZ el...

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Abstract

The invention provides a composite YSZ electrolyte for a solid oxide fuel cell and a preparation method of the composite YSZ electrolyte. The composite YSZ electrolyte is prepared by sequentially pressing a first YSZ tape casting sheet, a second YSZ tape casting sheet and a first YSZ tape casting sheet; through holes are distributed on each first YSZ tape casting sheet in an array manner; and grooves are distributed on the upper surface and the lower surface of the second YSZ tape casting sheet in the array manner. The composite YSZ electrolyte can ensure the cell to have enough mechanical strength while lowering the thickness of an SOFC electrolyte, and thus lowering the ohmic resistance of the cell. In addition, the electrolyte of a novel structure can expand the interfacial area of electrode / electrolyte, provides more activity reaction points to electrochemical reaction and thus lowering the polarization resistance of the cell.

Description

technical field [0001] The invention relates to the field of solid oxide fuel cells, in particular to a composite YSZ electrolyte for solid oxide fuel cells and a preparation method thereof. technical background [0002] Energy is an important basis for the survival and development of human society. In today's society, fossil energy coal, oil and natural gas are still the most important energy resources, but these energy sources will be gradually exhausted with the rapid development of human society. Moreover, during the combustion of fossil energy, a large amount of waste water and waste gas will be emitted, which will aggravate environmental pollution and the greenhouse effect. Therefore, in order to realize the sustainable development of human society, it is urgent to find a new energy technology. As an all-solid-state power generation device, solid oxide fuel cell (SOFC) can directly convert the chemical energy in the fuel into electrical energy without being limited b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1253
CPCH01M8/1253H01M2008/1293Y02E60/50
Inventor 蔡桂凡郭倩裴志彬
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY