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Cathode material for a fuel cell, cathode including the cathode material, and a solid oxide fuel cell including the cathode material

A fuel cell and cathode material technology, which is applied in the field of solid oxide fuel cells, and can solve problems such as the increase in the resistance of SOFC cathode materials

Inactive Publication Date: 2012-10-24
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a decrease in the operating temperature of the SOFC causes a significant increase in the electrical resistance of the cathode material of the SOFC, and such an increase is a major factor contributing to the decrease in the output density of the SOFC

Method used

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  • Cathode material for a fuel cell, cathode including the cathode material, and a solid oxide fuel cell including the cathode material
  • Cathode material for a fuel cell, cathode including the cathode material, and a solid oxide fuel cell including the cathode material
  • Cathode material for a fuel cell, cathode including the cathode material, and a solid oxide fuel cell including the cathode material

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0119] Preparation Example 1: Manufacture of Cathode (1)

[0120] To fabricate Ce as Sm, Nd-doped ceria SNDC 0.8 SM0.15 Nd 0.05 o 2 Ion-conducting powder, firstly 19.920g of Ce(NO 3 ) 3 ·6H 2 O, 3.823g of Sm(NO 3 ) 3 ·6H 2 O, 1.257g Nd(NO 3 ) 3 ·6H 2 O and 6.816g of urea were placed in 100ml of distilled water and stirred with a magnetic bar until they were completely dissolved. Using a hot plate, the resulting solution was heated at about 150°C for 12 hours to obtain a dry powder. Ce with a fluorite structure was obtained by heating the resulting dry powder at about 800 °C for two hours 0.80 SM 0.15 Nd 0.05 o 2 (referred to as SNDC).

[0121] The cathode material was obtained by dissolving 2.5 g La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 (FCM, hereinafter referred to as LSCF) and 2.5 g of the powder of SNDC obtained above were put into a tungsten bottle, 10 cc of ethanol was added to the tungsten bottle, they were mixed with a high-energy grinder (Mixer / Mill 8000D, ...

preparation Embodiment 2

[0122] Preparation Example 2: Manufacture of Cathode (2)

[0123] Fabrication of site-defected lanthanum strontium cobalt ferrous oxide (LSCF) La using the urea method 0.55 Sr 0.4 co 0.2 Fe 0.8 o 3 powder. Specifically, 8.457g of La(NO 3 ) 3 ·6H 2 O, 3.004g of Sr(NO 3 ) 2 , 2.066gCo(NO 3 ) 3 9H 2 O, 11.472g of Fe(NO 3 ) 3 9H 2 O and 7.288g of urea (CH 4 N 2 O) Put in 100 g of distilled water and stir with a magnetic bar until they are completely dissolved. Using a hot plate, the resulting solution was heated at about 150°C for 12 hours to obtain a dry powder. By heating the resulting dry powder at about 1000 °C for two hours, La with a perovskite structure 0.55 Sr 0.4 co 0.2 Fe 0.8 o 3 (referred to as L 0.55 SCF) powder.

[0124] The cathode material was obtained by adding 2.5 g of the above obtained L 0.55 SCF and 2.5 g of the SNDC powder obtained in Preparation Example 1 were put into a tungsten bottle, 10 cc of ethanol was added to the tungsten bot...

preparation Embodiment 3

[0125] Preparation Example 3: Manufacture of Cathode (3)

[0126] The same method as in Preparation Example 2 was carried out to obtain a cathode material, except that La strontium cobalt ferrous oxide (LSCF) was La 0.55 Sr 0.35 co 0.2 Fe 0.8 o 3 (referred to as L 0.55 S 0.35 CF) was manufactured using a solution obtained by dissolving 8.586 g of La(NO 3 ) 3 ·6H 2 O, 2.669g of Sr(NO 3 ) 2 , 2.0975g of Co(NO 3 ) 3 9H 2 O, 11.674g of Fe(NO 3 ) 3 9H 2 O and 6.949g of urea (CH 4 N 2 O) Put in 100 g of distilled water, and then dissolve the mixture.

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Abstract

The invention relates to a cathode material for a fuel cell, a cathode including the cathode material, and a solid oxide fuel cell including the cathode material. The cathode material for the fuel cell includes a metal oxide having a perovskite crystal structure at a metal defected position, and a metal oxide including at least two mixed lanthanide elements based on a cerium dioxide, wherein the lanthanide elements have an average ionic radius of about 0.90 to about 1.02.

Description

technical field [0001] The present disclosure relates to a cathode material for a fuel cell, a cathode for a fuel cell including the material, and a solid oxide fuel cell including the material. Background technique [0002] Solid oxide fuel cells (SOFCs) are efficient and eco-friendly electrochemical power generation units that directly convert the chemical energy of fuel gases into electrical energy while using solid oxides as electrolytes. SOFCs have many advantages over other types of fuel cells in that, for example, they use relatively cheap fuel materials and have relatively high tolerance to fuel impurities, hybrid power generation capabilities, and high efficiency. Furthermore, SOFCs can directly use hydrocarbon-based fuels without reforming the fuels to hydrogen, which simplifies and thus reduces costs for fuel cell systems using SOFCs. SOFCs include an anode where fuels such as hydrogen or hydrocarbons are oxidized, where oxygen is reduced to oxygen ions (O 2- ) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/02H01M8/10
CPCH01M8/10C04B2235/443C04B2235/768C04B35/2641C01G51/68H01M8/02C04B2235/3229Y02E60/50C04B2235/3277C04B2235/3213C04B35/50C04B35/2633C01P2002/34H01M4/86H01M4/9033C04B2235/3227C04B2235/3224Y02E60/525H01M2008/1293C04B2235/3275
Inventor 朴喜正郭灿
Owner SAMSUNG ELECTRO MECHANICS CO LTD
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