Chromium poisoning-resistant doped CeO2-coated LaNi0.6Fe0.4O3-delta cathode of solid oxide fuel cell and preparation method thereof

A solid oxide and fuel cell technology, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as Cr diffusion and accelerated oxide film growth

Inactive Publication Date: 2012-04-18
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The volatilization of Cr will not only accelerate the 2 o 3 Oxide film growth, and will cause the diffusion of Cr to the porous cathode

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 10 grams of ScSZ powder into a mixed solvent of 8 grams of butanone and 4 grams of ethanol, then add 0.5 grams of triethanolamine and mix for 2 hours, then add 0.4 grams of polyvinyl butyral, 1.5 grams of polyvinyl butyral Ethylene glycol and continue ball milling for 2 hours to obtain a stable and uniform slurry. Keep the ball milled slurry for 10 minutes under a vacuum of 100 mbar to eliminate the air bubbles in the slurry. This is slurry one; mix 50gNiO and 50gYSZ Add the mixed powder to a mixed solvent of 48 grams of methyl ethyl ketone and 24 grams of ethanol, then add 3 grams of triethanolamine and mix for 2 hours, then add 10 grams of polyvinyl butyral, 13.5 grams of polyethylene glycol and continue ball milling A stable and uniform slurry was obtained in 2 hours, and the ball-milled slurry was kept for 10 minutes under the condition of a vacuum of 100 mbar to eliminate air bubbles in the slurry, which is slurry 2. Pour the uniform and stable slurry 1 into th...

Embodiment 2

[0041] Add 10 grams of ScSZ powder into a mixed solvent of 8 grams of methyl ethyl ketone and 4 grams of ethanol, then add 0.5 grams of triethanolamine and mix for 2 hours, then add 0.4 grams of polyvinyl butyral, 1.5 grams of polyvinyl butyral Ethylene glycol and continue ball milling for 2 hours to obtain a stable and uniform slurry. Keep the ball milled slurry for 10 minutes under a vacuum of 100 mbar to eliminate the air bubbles in the slurry. This is slurry one; mix 50gNiO and 50gYSZ Add the mixed powder to a mixed solvent of 48 grams of methyl ethyl ketone and 24 grams of ethanol, then add 3 grams of triethanolamine and mix for 2 hours, then add 10 grams of polyvinyl butyral, 13.5 grams of polyethylene glycol and continue ball milling A stable and uniform slurry was obtained in 2 hours, and the ball-milled slurry was kept for 10 minutes under the condition of a vacuum of 100 mbar to eliminate air bubbles in the slurry, which is slurry 2. Pour the uniform and stable slurr...

Embodiment 3

[0043] Add 10 grams of ScSZ powder into a mixed solvent of 8 grams of methyl ethyl ketone and 4 grams of ethanol, then add 0.5 grams of triethanolamine and mix for 2 hours, then add 0.4 grams of polyvinyl butyral, 1.5 grams of polyvinyl butyral Ethylene glycol and continue ball milling for 2 hours to obtain a stable and uniform slurry. Keep the ball milled slurry for 10 minutes under a vacuum of 100 mbar to eliminate the air bubbles in the slurry. This is slurry one; mix 50gNiO and 50gYSZ Add the mixed powder to a mixed solvent of 48 grams of methyl ethyl ketone and 24 grams of ethanol, then add 3 grams of triethanolamine and mix for 2 hours, then add 10 grams of polyvinyl butyral, 13.5 grams of polyethylene glycol and continue ball milling A stable and uniform slurry was obtained in 2 hours, and the ball-milled slurry was kept for 10 minutes under the condition of a vacuum of 100 mbar to eliminate air bubbles in the slurry, which is slurry 2. Pour the uniform and stable slurr...

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Abstract

The invention relates to a chromium poisoning-resistant doped CeO2-coated LaNi0.6Fe0.4O3-delta cathode of a solid oxide fuel cell and a preparation method thereof. The doped CeO2 comprises foreign ions of Gd<3+>and Sm<3+>. The preparation method is characterized in that a doped CeO2 particle layer is coated on the surface of a sintered LaNi0.6Fe0.4O3-delta cathode aperture. Therefore, a cathode pore structure and conductive performances are not influenced; deposition of chromium of highly volatile CrO3 and CrO2(OH)2 on a LaNi0.6Fe0.4O3-delta / electrolyte interface is reduced; LaNi0.6Fe0.4O3-delta / electrolyte three-phase interface length is prolonged; and LaNi0.6Fe0.4O3-delta cathode oxygen reduction reaction dynamic performances are improved so that solid oxide fuel cell (SOFC) performances are improved.

Description

technical field [0001] The invention relates to a solid oxide fuel cell cathode and a preparation method thereof, in particular to a doped CeO 2 Coated LaNi 0.6 Fe 0.4 o 3-δ Cathode and its preparation method. Background technique [0002] At present, during the development of solid oxide fuel cells (SOFCs), people are increasingly aware of the importance of reducing the operating temperature of the cells. If the working temperature of the battery can be lowered to a medium temperature (700-800°C), the stability of the electrode can be improved, the thermal stress can be reduced, the battery life can be prolonged, and cheap metal alloys can also be used as the bipolar plate material of the battery. Among various metal alloys, Cr-containing metal alloys have become the most promising bipolar plate materials due to their advantages of low cost, easy processing, high electronic and thermal conductivity, high mechanical stability, high temperature resistance, and oxidation r...

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 黄波朱新坚
Owner SHANGHAI JIAO TONG UNIV
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