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Composite cathode of chromium-pollution-resistant solid oxide fuel battery and preparation method thereof

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

Inactive Publication Date: 2013-10-09
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

[0050] Add 10g of ScSZ powder into a mixed solvent of 8g of methyl ethyl ketone and 4g of ethanol, then add 0.5g of triethanolamine and mix for 2 hours, then add 0.4g of polyvinyl butyral, 1.5g of polyethylene 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;

[0051] Add 50g NiO and 50g YSZ mixed powder into the mixed solvent of 48g methyl ethyl ketone and 24g ethanol, then add 3g triethanolamine ball mill and mix for 2 hours, then add 10g polyvinyl butyral, 13.5g polyethylene 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 2;

[0052] Pour the uniform and stable slurry 1 into the silo of the tape casting machine for casting, and after it dries, pou...

Embodiment 2

[0057] The preparation method of the NiO-YSZ / ScSZ anode composite film is the same as that in Example 1.

[0058] 0.7g LNF powder and 0.3g Gd 2 o 3 Doped CeO 2 (Gd 0.1 Ce 0.9 o 2 , GDC) powder mixture mixed with 1g terpineol to form a slurry, which was deposited on the ScSZ electrolyte layer by screen printing and dried at 110°C for 0.5 hours to form the LNF-GDC active layer. The thickness of the active layer 5~10μm;

[0059] Then, 1g of LNF powder and 1g of terpineol were mixed to form a slurry, which was deposited on the LNF-GDC active layer by screen printing and dried at 110°C for 0.5 hours to form the LNF collector layer. The thickness of the solid oxide fuel cell LNF composite cathode is 15-10 μm; the green body of the obtained solid oxide fuel cell LNF composite cathode is sintered at 1100° C. for 2 hours to obtain the solid oxide fuel cell LNF composite cathode.

[0060] The solid oxide fuel cell LNF composite cathode prepared in this example has excellent anti-...

Embodiment 3

[0062] The preparation method of the NiO-YSZ / ScSZ anode composite film is the same as that in Example 1.

[0063] 0.7g LNF powder and 0.3g Gd 2 o 3 Doped CeO 2 (Gd 0.15 Ce 0.85 o 2 , GDC) powder mixture mixed with 1g terpineol to form a slurry, which was deposited on the ScSZ electrolyte layer by screen printing and dried at 110°C for 0.5 hours to form the LNF-GDC active layer. The thickness of the active layer 5~10μm;

[0064]Then, 1g of LNF powder and 1g of terpineol were mixed to form a slurry, which was deposited on the LNF-GDC active layer by screen printing and dried at 110°C for 0.5 hours to form the LNF collector layer. The thickness of the solid oxide fuel cell LNF composite cathode is 15-10 μm; the green body of the obtained solid oxide fuel cell LNF composite cathode is sintered at 1100° C. for 2 hours to obtain the solid oxide fuel cell LNF composite cathode.

[0065] The solid oxide fuel cell LNF composite cathode prepared in this example has excellent anti...

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Abstract

The invention discloses a composite cathode of a chromium-pollution-resistant solid oxide fuel battery and a preparation method thereof. The composite cathode comprises an active layer and a collector layer. The active layer is arranged on an electrolyte layer, and the active layer is made of LNF-doped CeO2; and the collector layer is arranged on the active layer and made of LNF. The preparation method comprises the following steps of step1. adhering the pulp which is formed by the preparation material of the active layer onto the electrolyte layer to be dried, and preparing an active layer blank body; step 2. adhering the pulp which is formed by the preparation material of the collector layer onto the active layer blank body, and drying the pulp to obtain the collector layer blank body, and compounding the prepared active layer and the prepared collector layer into a cathode blank body; and step 3. sintering the composite cathode blank body. The composite cathode has excellent electrochemical catalytic performance and chromium pollution resistance; the preparation method has the advantages of simplicity in process, short preparation period and low cost, and the chromium-pollution-resistant solid oxide fuel battery is applicable to the industrialized application.

Description

technical field [0001] The invention relates to a cathode of a solid oxide fuel cell, in particular to a composite cathode of a solid oxide fuel cell, and also relates to a preparation method of the composite cathode of the solid oxide fuel cell. Background technique [0002] At present, during the development of solid oxide fuel cells (Solid Oxide Fuel Cell, SOFC), people are more and more aware of the importance of reducing the operating temperature of the battery. If the working temperature of the battery can be lowered to 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 alloy can also be used as the bipolar plate material of the battery. Among various metal alloys, Cr-based metal alloys have become the most promising materials for bipolar plates due to their advantages such as low cost, easy processing, high electronic and thermal conductivity, high mechan...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 黄波朱新坚袁梦李扬程念陈卢鑫张志秋
Owner SHANGHAI JIAO TONG UNIV
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