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Direct carbon solid oxide fuel cell

A solid oxide, fuel cell technology, used in solid electrolyte fuel cells, fuel cell components, battery electrodes, etc. Carbon fuel use efficiency and other issues, to avoid fluidized bed equipment, intensive battery structure, and improve work efficiency

Active Publication Date: 2010-04-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two solid oxide fuel cells using carbon fuel still have many limitations
The first type of fuel cell uses noble metal platinum electrodes, which is not suitable for practical applications; in addition, the use of sheet electrolyte requires the use of additional ceramic tubes when packaging the battery, which is not conducive to the assembly of batteries and battery packs, and also seriously affects the overall volumetric power of the battery. Density or gravimetric power density, because the additional ceramic tube only serves to isolate the fuel from the air and does not participate in the cell reaction
The second battery requires a fluidizing gas, which increases the complexity of the device; the fluidizing gas contains CO 2 Participate in the battery reaction, strictly speaking, it is a kind of CO 2 Internally reformed fuel cells, not true direct carbon fuel cells
CO 2 It is the substance with the lowest energy in nature, and it participates in the reaction of the battery, which will reduce the efficiency of the use of carbon fuel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh a certain quality of YSZ powder, add pure water according to the mass ratio of YSZ and pure water to 1:10, and ball mill to obtain a uniformly dispersed slurry, and use the grouting method to prepare a tubular YSZ electrolyte tube support body 1 green body . Put the green body in a high-temperature electric furnace and sinter in air at 1600°C for 4 hours to obtain a dense electrolyte tube, which is about 3.5 cm long, 0.8 cm in inner diameter, and 0.3 mm in wall thickness.

[0044] Apply the purchased DAD-87 silver conductive adhesive (produced by Shanghai Synthetic Resin Research Institute) with a paintbrush to all areas (thickness about 35um) below the inner wall and outer wall of the electrolyte tube support body 1 below 25mm from the nozzle, and dry it in a high-temperature oven , placed in a high-temperature electric furnace at 600°C for sintering in air for 2h to prepare the anode and cathode. The effective area of ​​the cathode is 2.5cm 2 . The activated ...

Embodiment 2

[0048] Weigh a certain quality of YSZ powder, add pure water according to the mass ratio of YSZ and pure water to 1:10, and ball mill to obtain a uniformly dispersed slurry, and use the grouting method to prepare a tubular YSZ electrolyte tube support body 1 green body . Put the green body in a high-temperature electric furnace and sinter in air at 1600°C for 4 hours to obtain a dense electrolyte tube, which is about 3.5 cm long, 0.8 cm in inner diameter, and 0.3 mm in wall thickness.

[0049] Apply the purchased DAD-87 silver conductive adhesive (produced by Shanghai Synthetic Resin Research Institute) with a paintbrush to all areas (thickness about 34um) below the inner wall and outer wall of the electrolyte tube support 1 that are 25mm away from the nozzle, and dry in a high-temperature oven , placed in a high-temperature electric furnace at 600°C for sintering in air for 2h to prepare the anode and cathode. The effective area of ​​the cathode is 5.08cm 2 . The graphite ...

Embodiment 3

[0053] Weigh a certain quality of YSZ powder, add pure water according to the mass ratio of YSZ and pure water to 1:10, and ball mill to obtain a uniformly dispersed slurry, and use the grouting method to prepare a tubular YSZ electrolyte tube support body 1 green body . Put the green body in a high-temperature electric furnace and sinter in air at 1600°C for 4 hours to obtain a dense electrolyte tube, which is about 3.5 cm long, 0.8 cm in inner diameter, and 0.3 mm in wall thickness.

[0054] Mix gadolinium-stabilized cerium oxide (GDC) and Ag powder uniformly in a mass ratio of 55:45, and then mix the mixture with an organic binder in a mass ratio of 1:1; the organic binder raw material is composed of ethyl cellulose and Terpineol composition, wherein, the mass ratio of ethyl cellulose and terpineol is 1:9. The mixture of the above components is fully ground to obtain a uniformly dispersed anode slurry. The anode slurry was painted on the inner wall of the electrolyte tube...

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Abstract

The invention discloses a direct carbon solid oxide fuel cell, wherein an electrolyte tube support body is a tubular structure with one closed end, the tubular inner wall of the electrolyte tube support body is provided with a porous anode film and the outer wall thereof is provided with a porous cathode film; powder carbon is in the porous anode film of the electrolyte tube support body, and a gas-guide tube is sealed at an opening end of the electrolyte tube support body; the opening end of the electrolyte tube support body and the gas-guide tube are sealed through a heat-resistant sealing-in material; the material of the electrolyte tube support body is yttrium-stabilized zirconia; and a slip casting forming method or dipping method is adopted for preparation and the fuel cell is formed by sintering for 3-4h in the air at the temperature of 1, 400-1, 600 DEG C. The cell is a solid oxide fuel cell directly using carbon fuel and is of a full solid structure. Electric energy output can be obtained by heating the cell with gas discharged simultaneously. The cell has the advantages of simple structure, easy operation, high conversion efficiency and the like and has great significance to the high efficient and clean use of coal-based fuel.

Description

technical field [0001] The present invention relates to a fuel cell, in particular to a direct carbon solid oxide fuel cell, in particular to a technology for electrochemically gasifying carbon and simultaneously generating electricity using solid oxide fuel cell technology. Background technique [0002] my country's coal-rich and oil-poor energy structure, the constraints of environmental protection on fuel, and the security of national energy supply make my country's energy source for a long time to come mainly coal. Therefore, how to use coal efficiently and cleanly has become the focus of all parties. [0003] Fuel cell technology is a device that directly converts the chemical energy of fuel into electrical energy through electrochemical reactions. Its theoretical efficiency is the Gibbs free energy in the fuel Δ f G and the chemical energy (enthalpy) Δ contained in the fuel f H ratio. The theoretical efficiency of a fuel cell that directly uses carbon as fuel is cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/10H01M4/86H01M4/88B01J23/745B01J23/75B01J23/755B01J23/72H01M8/0289
CPCY02E60/521Y02E60/50
Inventor 刘江唐玉宝隋静
Owner SOUTH CHINA UNIV OF TECH
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