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High-temperature fuel cell system having anode loading functional coating with methane as main fuel

A fuel cell system, battery system technology, applied in the direction of fuel cells, fuel cell parts, solid electrolyte fuel cells, etc.

Active Publication Date: 2008-11-19
福赛尔科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of how to improve the power density and carbon deposition resistance of direct methane fuel cells, thereby providing a high-temperature fuel cell system using methane as fuel with a layer of functional catalytic coating on the surface of the anode

Method used

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  • High-temperature fuel cell system having anode loading functional coating with methane as main fuel
  • High-temperature fuel cell system having anode loading functional coating with methane as main fuel
  • High-temperature fuel cell system having anode loading functional coating with methane as main fuel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Ni+ScSZ|ScSZ|La with methane and oxygen as fuel 0.8 Sr 0.2 MnO 3 fuel cell system

[0032] First, prepare the catalyst: weigh Ni(NO 3 ) 2 ·6H 2 O 3.468g, Al(NO 3 ) 2 9H 2 O 68.43g. Dissolve with deionized water, add glycine, wherein, the molar ratio of glycine to total metal ions (G / M n+ ) ratio of 2:1, after being completely dissolved, the solution was heated to a viscous state at 80°C with stirring, and then spontaneously burned in an oven at a temperature of 240°C. After cooling, it is calcined at 800°C for 5 hours in a muffle furnace, and ground into powder to obtain NiO-Al 2 o 3 Powder.

[0033] Then, prepare the battery: weigh 30g of ScSZ powder and 45g of NiO powder, add 5.25g of PVB and an appropriate amount of ethanol, take it out after ball milling for 24 hours, maintain 80°C for drying, and then ball mill for 40 minutes to obtain the required anode composite powder. Weigh 0.3g of anode powder and 0.02g of ScSZ to make a green body cont...

Embodiment 2

[0036] Example 2: Ni+ScSz|ScSz|La with methane and steam as fuel 0.8 Sr 0.2 MnO 3 fuel cell system.

[0037] First, prepare the catalyst: weigh Ni(NO 3 ) 2 ·6H 2 O 3.964g, Al(NO 3 ) 2 · 9H 2 O 67.70g. Dissolve with deionized water, add glycine, wherein, the molar ratio of glycine to total metal ions (G / M n+ ) ratio of 2.5:1. After being completely dissolved, the solution was heated at 100°C under stirring to become viscous, and then spontaneously burned in an oven at a temperature of 230°C. After cooling, it is calcined at 850°C for 6 hours in a muffle furnace, and ground into powder to obtain NiO-Al 2 o 3 Powder.

[0038] The method for preparing the battery is the same as in Example 1.

[0039] Secondly, prepare the anode catalytic coating, 1gNiO-Al 2 o 3 Add 18ml of isopropanol, 1.0ml of glycerin, and 3.5ml of ethylene glycol to the powder, put it into the high-energy ball mill for 40 minutes, take it out, spray it on the surface of the anode with a spray gun...

Embodiment 3

[0041] Example 3: Ni+ScSZ|ScSZ|La with methane and carbon dioxide as fuel 0.8 Sr 0.2 MnO 3 fuel cell system

[0042] First, prepare the catalyst: weigh Ru(NO 3 ) 3 1.988g, Ce(NO 3 ) 4 ·6H 2 O 23.46g. Dissolve with deionized water, add glycine, wherein, the molar ratio of glycine to total metal ions (G / M n+ ) ratio of 3:1. After being completely dissolved, the solution was heated to a viscous state at 110°C with stirring, and then spontaneously burned in an oven at a temperature of 200°C. After cooling, it was calcined at 800°C for 7 hours in a muffle furnace, and ground into powder to obtain RuO 2 -CeO 2 Powder.

[0043] The battery was prepared, and the catalyst coating method was the same as in Example 1.

[0044] Then, a solid oxide fuel cell test using methane and carbon dioxide (2:1) as fuel was carried out, a four-probe structure was adopted, and a casing was added outside the reactor. From image 3 It can be seen from the figure that when no catalytic laye...

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Abstract

The invention relates to solid oxide fuel cell technical field, in particular to a high temperature cell system which is loaded with a functional coating at the anode and takes firedamp as main fuel. A catalyzing coating is arranged on the surface of the anode of the cell; when firedamp is taken as the main fuel, carbon monoxide and inflammable air will be generated according to the partial oxidation of the firedamp and the reforming reaction inside the cell, and anti-carbon property of the anode will improved; the catalyzer of the catalyzing coating is NiO-Al2O3, or RuO2-Al2O3, or RuO2-CeO2, or NiO-Al2O3 with the additive of La2O3 and / or Li2O. The cell system partially oxidates the firedamp and combines good catalyzer in the reforming reaction with solid oxide fuel cell, thus improving the property of the firedamp fuel cell. The invention remarkably improves the power density and operational stability of the fuel cell and anti-carbon resistance of the anode; therefore the cell system is applicable to portable fuel cell devices. Meanwhile, the exhaust gas can be recycled, thus minimizing influence to the environment.

Description

technical field [0001] The invention relates to a fuel cell system, in particular to a high-temperature fuel cell system which uses methane as fuel and supports a layer of functional catalytic coating on the surface of the anode. Background technique [0002] Directly use natural gas (mainly CH 4 ) fueled SOFC is the simplest in terms of operation and equipment, and has begun to arouse great interest in the world, which can be verified from the appearance of a large number of articles on this aspect in the current open literature. However, it has the disadvantages of low electrochemical activity of methane (especially at low temperature), and carbon deposition on the electrode surface, which leads to rapid deactivation. Although the current direct methane SOFC has shown excellent anti-carbon performance, there are Perovskite anodes have disadvantages such as low electronic conductivity and poor adhesion to traditional electrolyte materials. Therefore, direct methane (natura...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/90H01M8/02H01M8/12H01M8/1213
CPCY02E60/521Y02E60/525Y02E60/50
Inventor 邵宗平王纬冉然蔡锐
Owner 福赛尔科技集团有限公司
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