Solid oxide fuel cell cerium-oxide-based electrolyte barrier layer and preparation method thereof

A solid oxide, electrolyte layer technology, used in solid electrolyte fuel cells, fuel cells, battery pack components and other directions, can solve the problems of poor contact performance, poor chemical and thermal compatibility, etc., to improve contact performance, improve long-term Stability and reliability, good contact effect

Active Publication Date: 2013-11-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor chemical and thermal compatibility between cobalt-containing highly active cathodes and zirconia-based electrolytes in solid oxide fuel cells, and poor contact performance between cathodes and electrolytes, the object of the present invention is to provide a A dense cerium oxide-based electrolyte interlayer that can effectively prevent the reaction between the cobalt-containing cathode and t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In nickel oxide with Y 2 o 3 Stable ZrO 2 Composite anode / Y 2 o 3 Stable ZrO 2 Sputtering Dense Gd on Membrane Electrode (NiO-YSZ / YSZ) 2 o 3 Doped CeO 2 (Gd 0.1 Ce 0.9 o 1.95 ) Electrolyte interlayer, ultrasonically clean the anode-supported membrane electrode with acetone, ethanol, and distilled water in sequence and dry it, then put it into the vacuum chamber of the magnetron sputtering instrument, adjust the target base distance to about 6cm, and use cerium / Gadolinium alloy material is used as the target material, the purity of the target material is above 99.99%, the cerium / gadolinium molar ratio is 9 / 1, and the vacuum is 8*10 -4 Pa, and then heated the substrate stage, the temperature was raised to 400°C, the argon flow was 30.0sccm, the oxygen flow was 3.0sccm, and the sputtering power was 10W / cm 2 , the sputtering pressure is 0.5Pa, the rotation speed of the substrate stage is set at 5 revolutions / min, the thickness is about 350nm, and the dense and d...

Embodiment 2

[0027] In nickel oxide with Y 2 o 3 Stable ZrO 2 Composite anode / Sc 2 o 3 Stable ZrO 2 Sputtering dense Sm on the membrane electrode (NiO-YSZ / ScSZ) 2 o 3 Doped CeO 2 (Sm 0.2 Ce 0.8 o 1.9 ) Electrolyte interlayer, adjust the target base distance to about 7cm, use cerium / samarium alloy material as the target material, the purity is above 99.9%, the molar ratio of cerium / samarium is 8 / 2, and vacuumize to 8*10 -4 Pa, then heat the substrate stage, the temperature rises to 300°C, the flow rate of argon gas is 40.0 sccm, the flow rate of oxygen gas is 3.0 sccm, and the sputtering power is 8W / cm 2 , the sputtering pressure is 1.0Pa, the thickness is about 600nm, the rotation speed of the substrate table is set at 10 cycles / min, and the dense Sm 0.2 Ce 0.8 o 1.9 After the sputtering of the interlayer, the temperature is lowered to 30°C, the flow rate of argon gas is 20.0 sccm, the flow rate of oxygen gas is 2.0 sccm, and the sputtering power is 3W / cm 2 , the sputtering p...

Embodiment 3

[0029] In nickel oxide with Y 2 o 3 Stable ZrO 2 Composite anode / Y 2 o 3 Stable ZrO 2 Sputtering dense Y on membrane electrode (NiO-YSZ / YSZ) 2 o 3 Doped CeO 2 (Y 0.11 Ce 0.89 o 1.95 ) Electrolyte interlayer, the target base distance is about 9cm, the target material is cerium-yttrium alloy material, the purity is above 99.9%, the molar ratio of cerium / yttrium is 88 / 12, and the vacuum is 8*10 -4 Pa, then heat the substrate table, the temperature rises to 650°C, the argon flow rate is 40 sccm, the oxygen flow rate is 3 sccm, and the sputtering power is 12W / cm 2 , the sputtering pressure is 1.2Pa, the rotation speed of the substrate stage is set at 6 cycles / min, the thickness is about 800nm, and the dense Y 0.11 Ce 0.89 o 1.95 After the sputtering of the interlayer, the temperature of the substrate table is lowered to room temperature, and the sputtering of the loose layer is performed, the oxygen flow rate is 2 sccm, the argon gas flow rate is 30 sccm, and the sputt...

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Abstract

The invention discloses a solid oxide fuel cell cerium-oxide-based electrolyte barrier layer comprising a compact layer and a loose layer. The compact layer can effectively inhibit harmful chemical reactions and element diffusion between cobalt cathode and a zirconia-based electrolyte. The loose layer can improve the contact performance of a cathode/electrolyte interface. The barrier layer is prepared with a radio frequency magnetron reactive sputtering method under a lower temperature, such that the production of cerium-zirconium oxide solid solution produced through the reaction with the zirconia-based electrolyte is avoided. With the barrier layer, cell performance is effectively improved, and long-time stability and reliability of the solid oxide fuel cell are improved.

Description

technical field [0001] The invention relates to the field of solid oxide fuel cells, in particular to a ceria-based electrolyte interlayer between a cobalt-containing cathode and a zirconia-based electrolyte and a preparation method thereof. Background technique [0002] Solid oxide fuel cell is an energy conversion device that can efficiently convert the chemical energy in fuel gas (such as hydrogen, natural gas, coal gas, etc.) Low noise, it is an ideal distributed power station and centralized power station technology, and can also be applied to vehicle auxiliary power supply, portable power supply, etc. [0003] In order to reduce manufacturing costs, improve long-term battery stability and reliability, and shorten start-up time, medium and low temperature solid oxide fuel cells with an operating temperature of 500-700 °C have become the focus of research and development at home and abroad. However, currently used medium and low temperature high-performance cobalt-conta...

Claims

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Application Information

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IPC IPC(8): H01M2/16H01M8/12H01M8/1226H01M8/124
CPCY02E60/12Y02E60/521Y02E60/525Y02P70/50Y02E60/50
Inventor 程谟杰武卫明涂宝峰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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