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A Method for Improving Catalytic Performance of High Catalytic Activity Direct Carbon Fuel Cell Anode Material

A high catalytic activity, fuel cell technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of limited number of electrochemical reaction active sites, low output power of direct carbon fuel cells, and few contact sites, etc., to achieve The effect of increasing chemical reaction active sites, improving electrochemical reaction activity, and increasing output power

Active Publication Date: 2020-11-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is aimed at the poor catalytic activity of the anode to solid carbon in the solid oxide direct carbon fuel cell, and the particle size of the solid carbon fuel is relatively large, resulting in few contact sites between the fuel and the anode and the electrolyte, and the electrochemical reaction activity is low. The number of sites is very limited, resulting in the problem that the output power of direct carbon fuel cells is generally low, and a method for improving the catalytic performance of direct carbon fuel cell anode materials with high catalytic activity is provided. The contact of solid carbon to achieve the purpose of increasing the battery output power without affecting the working stability of the battery

Method used

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  • A Method for Improving Catalytic Performance of High Catalytic Activity Direct Carbon Fuel Cell Anode Material
  • A Method for Improving Catalytic Performance of High Catalytic Activity Direct Carbon Fuel Cell Anode Material
  • A Method for Improving Catalytic Performance of High Catalytic Activity Direct Carbon Fuel Cell Anode Material

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Embodiment 1

[0038] A direct carbon fuel SOFC anode material with high stability and catalytic activity, the specific molecular formula is (PrBa) 0.95 Fe 1.4 Cu 0.4 Nb 0.2 o 5+δ .

[0039] The material preparation method is as follows:

[0040] Take 4.1326g of praseodymium nitrate hexahydrate, 2.4827g of barium nitrate, 5.656g of ferric nitrate nonahydrate, 0.9664g of copper nitrate trihydrate, and 1.0761g of niobium oxalate in 500ml of deionized water, add 16.3909g of citric acid, and heat and stir in a water bath at 80°C until A reddish-brown transparent gel is formed, which is dried at 250°C to obtain a brown precursor. After the precursor is ground finely, it is calcined at 950°C for 6 hours in an air atmosphere to obtain (PrBa) with a perovskite phase structure. 0.95 Fe 1.4 Cu0.4 Nb 0.2 o 5+δ Anode material, XRD analysis shows that the prepared oxide corresponds to the standard peak of perovskite, the prepared anode material is mixed with activated carbon, and after being kept...

Embodiment 2

[0044] A direct carbon fuel SOFC anode material with high stability and catalytic activity, the specific molecular formula is (PrBa) 0.95 Fe 1.7 Cu 0.1 Nb 0.2 o 5+δ .

[0045] Prepared by solid-phase method, the specific method is as follows:

[0046] Weigh 1.6173g praseodymium oxide (Pr 6 o 11 ), 1.8747g of barium carbonate, 1.36g of ferric oxide, 0.0795g of copper oxide, and 0.2658g of niobium pentoxide were placed in a ball mill for 24 hours at a speed of 400 revolutions per second, and the powder after ball milling was placed in an air atmosphere Calcined at 1100℃ for 10h to obtain (PrBa) with perovskite phase structure 0.95 Fe 1.7 Cu 0.1 Nb 0.2 o 5+δ anode material.

[0047] Taking the prepared material as the anode material, La 0.6 Sr 0.4 co 0.2 Fe 0.8 o 3 (LSCF) as the cathode material, with La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 o 3-δ (LSGM) is printed on both sides of the electrolyte by screen printing as the electrolyte, brushed twice on each side, and sin...

Embodiment 3

[0049] A direct carbon fuel SOFC anode material with high stability and catalytic activity, the specific molecular formula is (PrBa) 0.95 Fe 1.5 Cu 0.3 Nb 0.2 o 5+δ .

[0050] The material preparation method is as follows:

[0051] Take 4.1326g of praseodymium nitrate hexahydrate, 2.4827g of barium nitrate, 6.06g of ferric nitrate nonahydrate, 0.7248g of copper nitrate trihydrate, 1.0761g of niobium oxalate in 500ml of deionized water, add 16.3909g of citric acid, and heat and stir in a water bath at 80°C until A reddish-brown transparent gel is formed, which is dried at 250°C to obtain a brown precursor. After the precursor is ground finely, it is calcined at 1000°C for 6 hours in an air atmosphere to obtain (PrBa) with a perovskite phase structure. 0.95 Fe 1.5 Cu 0.3 Nb 0.2 o 5+δ anode material.

[0052] Using the synthesized material as the anode material, the anode of the direct carbon fuel cell was prepared by the water drop template method. solution in a sampl...

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Abstract

The invention relates to a method for improving catalytic performance of a high-catalytic-activity direct carbon fuel cell anode material, in particular to direct carbon fuel cell anode material withhigh stability and catalytic activity and an anode morphology improvement method thereof so as to implement high output performance of a direct carbon fuel cell, and belongs to the technical field ofclean energy. A new material (PrBa)0.95Fe2-x-yCuxNbyO5+delta (PBFCN) synthesized by the invention is used as a hybrid direct carbon solid oxide fuel cell anode material, wherein a value of content x of the Cu is 0.1 to 0.4, and a value of content y of the Nb is 0.1 to 0.4. by a water droplet template method, an anode morphology of the cell is regulated and controlled so as to improve catalytic performance and greatly improve output performance of the cell; and at a working temperature of 800 DEG C, the unit cell of which the anode morphology is improved can reach the maximum output power of 790mW / cm<2> and performance is improved by nearly 60%.

Description

technical field [0001] The invention relates to a method for improving the catalytic performance of a direct carbon fuel cell anode material with high catalytic activity, in particular to a direct carbon fuel cell anode material with high stability and catalytic activity and a method for improving the shape of the anode to realize direct carbon fuel The high output performance of the battery belongs to the field of clean energy technology. Background technique [0002] The rapid development of the world economy has led to a continuous increase in energy demand. As a country with rapid development today, my country's demand for energy is also increasing day by day. However, my country's traditional energy utilization methods such as coal-fired power generation continue to pollute the environment and cannot meet the current increasing demand. Therefore, the need for efficient and clean utilization of energy is becoming more and more urgent. Solid oxide direct carbon fuel cell ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90
CPCY02E60/50
Inventor 孙克宁乔金硕马敏剑王振华孙旺
Owner BEIJING INSTITUTE OF TECHNOLOGYGY