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Method for preparation electrode of molten carbonate fuel cell thorugh dry process

A fuel cell electrode and molten carbonate technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of expensive preparation equipment, long production time, environmental and operator hazards, and achieve simple process and improved development. Environment, the effect of reducing ball milling time

Inactive Publication Date: 2006-04-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation equipment required for this process is very expensive and the production time is long, especially the use of organic solvents will pose certain hazards to the environment and operators

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Firstly, 100 grams of carbonyl nickel powder and 10 grams of polyvinyl butyral are dried. Dry nickel carbonyl powder at 80°C for 2 hours, and dry polyvinyl butyral at 40°C for 2 hours. Then, after the two powders are fully mixed, put the mixture on the two sides of the rolling machine. In a hopper, adjust the distance between the two rollers of the rolling machine to be 1 mm, insert a punched nickel substrate with a thickness of 0.1 mm, a hole diameter of 1 mm, and a hole distance of 1 mm between the rollers, and roll the mixture Pressed onto this punched nickel substrate, a green substrate having a thickness of 1.2 mm was obtained. Put the above-mentioned raw substrate into a belt-type temperature-programmed furnace with a reducing atmosphere for debonding and reduction sintering. The belt speed is 15 cm / min, and the highest sintering temperature is 850 ° C to obtain a thickness of 0.7 mm with a thickness of 75 % porosity, a cathode with an average pore size of 12 μm....

Embodiment 2

[0019] At first the carbonyl nickel powder with a weight of 100 grams and the polyvinyl butyral with a weight of 15 grams are dried. Dry nickel carbonyl powder at 100°C for 3 hours, and dry polyvinyl butyral at 55°C for 3 hours. Then, after the two powders are fully mixed, put the mixture on the two sides of the rolling machine. In a hopper, adjust the distance between the two rollers of the rolling machine to be 1.25 mm, insert a punched nickel substrate with a thickness of 0.15 mm, a hole diameter of 1.5 mm, and a hole distance of 1.5 mm between the rollers, and roll the mixture Pressed onto the punched nickel substrate, a green substrate having a thickness of 1.25 mm was obtained. Put the above-mentioned raw substrate into a belt-type temperature-programmed furnace with a reducing atmosphere for debonding and reduction sintering, the belt speed is 18 cm / min, and the highest sintering temperature is 850 ° C to obtain a thickness of 0.7 mm, with a thickness of 80 % porosity,...

Embodiment 3

[0021] First, the carbonyl nickel powder with a weight of 100 grams and the polyvinyl alcohol with a weight of 20 grams are dried. Dry nickel carbonyl powder at 120°C for 4 hours, and dry polyvinyl alcohol at 70°C for 4 hours. Then, after the two powders are fully mixed, put the mixture in the two hoppers of the rolling machine , adjust the distance between the two rollers of the rolling machine to be 1.3 mm, insert a punched nickel substrate with a thickness of 0.2 mm, a hole diameter of 2 mm, and a hole distance of 2 mm between the rollers, and roll the mixture to the Punch holes on the nickel substrate to obtain a green substrate with a thickness of 1.3 mm. Put the above-mentioned raw substrate into a belt-type temperature-programmed furnace with a reducing atmosphere for debonding and reduction sintering. The belt speed is 20 cm / min, and the highest sintering temperature is 950 ° C to obtain a thickness of 0.7 mm with a thickness of 65. % porosity, an anode with an averag...

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Abstract

The method includes following steps: (1) dry process is carried out for powder of nickel carbonyl as raw material and binding material; and the two kinds of powder are mixed; (2) the mixed powder is put into two hoppers of roller press; nickel baseplate with holes punched is inserted between two rollers; and distance between two rollers is adjusted; while rolling, rollers roll down powder to the nickel baseplate so as to obtain raw baseplates; (3) under reducing atmosphere, discharging sticky objects and reduced reduce sntering are carried out for raw baseplates in tape transport type temperature programming stove so as to obtain cathodes or anodes. Features are: compact structure of fuel cell, simple technical process, and suitable to industrialized volume production.

Description

technical field [0001] The invention relates to a preparation method in the technical field of fuel cells, in particular to a dry method for preparing molten carbonate fuel cell electrodes. Background technique [0002] Molten carbonate fuel cell is a power generation device that directly converts the chemical energy of fuel into electrical energy. It has the characteristics of high conversion efficiency and low emission. In particular, it can use renewable resources such as biomass to generate electricity. It is the future One of the power generation forms of distributed clean power plants. The basic unit of a molten carbonate fuel cell consists of a cathode, an electrolyte plate and an anode. How to prepare a large-area, self-supporting cathode and anode that meets the porosity requirements is one of the key technologies for the research and development of molten carbonate fuel cells. . [0003] After searching the literature of the prior art, it was found that the inven...

Claims

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Application Information

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IPC IPC(8): H01M4/88
CPCY02E60/50
Inventor 余晴春吴益华蒋春宝
Owner SHANGHAI JIAO TONG UNIV
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