Production technology of Fe/N/C cathode for novel direct sodium borohydride fuel cell

A cathode and technology technology, applied in the field of electrode preparation, direct sodium borohydride fuel cell cathode preparation, can solve problems such as regulating the number of graphene layers, and achieve the effects of simplifying preparation technology, reducing production costs, and high power generation performance

Inactive Publication Date: 2012-10-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The study found that it is easy to grow multi-layer graphene on the surface of metal nickel, and it is difficult to simply control the number of layers of graphene by controlling parameters such as reaction components and temperature during the growth process

Method used

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  • Production technology of Fe/N/C cathode for novel direct sodium borohydride fuel cell
  • Production technology of Fe/N/C cathode for novel direct sodium borohydride fuel cell
  • Production technology of Fe/N/C cathode for novel direct sodium borohydride fuel cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] in such as figure 1 In the shown reactor, the nickel foam and carbon cloth double-layer rolls are placed on the left shaft, and the nickel foam and carbon cloth are pulled out through the middle reaction zone and fixed on the right winding mechanism. Vacuum the reactor to 10 -2 Pa and filled with nitrogen and then evacuated, repeated several times to make the residual oxygen in the reactor less than 10 -4 Pa. Raise the temperature of the intermediate reaction zone to 1050 o C. Start to feed the mixed gas of methane and nitrogen (the volume fraction of methane is 40%, and the gas fraction of nitrogen is 60%), and at the same time start the right drive winding mechanism to make the nickel foam and carbon cloth pass through the middle at a speed of 0.5 mm / min. In the reaction zone, graphene is grown on the surface of the nickel foam. When the nickel foam and carbon cloth are completely rolled up on the right side, stop heating and ventilation, and reduce the temp...

Embodiment 2

[0019] in such as figure 1 In the shown reactor, the nickel foam and carbon cloth double-layer rolls are placed on the left shaft, and the nickel foam and carbon cloth are pulled out through the middle reaction zone and fixed on the right winding mechanism. Vacuum the reactor to 10-2 Pa and filled with nitrogen and then evacuated, repeated several times to make the residual oxygen in the reactor less than 10 -4 Pa. Raise the temperature of the intermediate reaction zone to 1050 o C. Start to feed the mixed gas of methane and nitrogen (the volume fraction of methane is 20%, and the gas fraction of nitrogen is 80%), and at the same time start the right drive winding mechanism to make the nickel foam and carbon cloth pass through the middle at a speed of 5 mm / min. In the reaction zone, graphene is grown on the surface of the nickel foam. When the nickel foam and carbon cloth are completely rolled up on the right side, stop heating and ventilation, and reduce the temperat...

Embodiment 3

[0022] in such as figure 1 In the shown reactor, the nickel foam and carbon cloth are double-layered on the left shaft, and the nickel foam and carbon cloth are pulled out through the middle reaction zone and fixed on the right winding mechanism. Vacuum the reactor to 10 -2 Pa and filled with nitrogen and then evacuated, repeated several times to make the residual oxygen in the reactor less than 10 -4 Pa. Raise the temperature of the intermediate reaction zone to 1050 o C. Start to feed the mixed gas of methane and nitrogen (the volume fraction of methane is 40%, and the gas fraction of nitrogen is 60%), and at the same time start the right drive winding mechanism to make the nickel foam and carbon cloth pass through the middle continuously at a speed of 50 mm / min. In the reaction zone, graphene is grown on the surface of the nickel foam. When the nickel foam and carbon cloth are completely rolled up on the right side, stop heating and ventilation, and reduce the tem...

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Abstract

The invention provides an industrial production technology for preparing an Fe / N / C cathode. The Fe / N / C cathode can be directly applied to a direct sodium borohydride fuel cell. The industrial production technology comprises the processes of: preparing a porous graphene network, carrying out in-situ treatment of loading and nitrogen doping on nanometer iron, preparing the cathode and a membrane assembly, and the like. Due to the industrial production technology, the controllable growth of a graphene sheet layer in Fe / N / C and the continuous production of the cathode can be realized. Moreover, the industrial production technology avoids the hydrophobic treatment link in the traditional process, remarkably simplifies the preparation process of the cathode for the fuel cell, and is of great importance in promoting the practical application of the fuel cell.

Description

technical field [0001] The technology relates to the field of electrode preparation, in particular to the field of direct sodium borohydride fuel cell cathode preparation. Background technique [0002] Fuel cell is a power generation technology that directly converts chemical energy stored in fuel into electrical energy. Due to its advantages of high energy conversion efficiency, low emission, no pollution and no noise, it is considered to be the next generation of thermal power, hydraulic power and nuclear power. The fourth power generation method outside. The development of non-precious metal catalysts has always been one of the key issues to reduce the cost of fuel cells and promote the practical application of fuel cell technology [Michel Lefèvre, Eric Proietti, Frédéric Jaouen, Jean-Pol Dodelet, Science, 2009, 324:71-74]. [0003] Co / N / C catalysts are considered to be one of the most potential to replace expensive Pt / C as fuel cell cathode catalysts. The Co / N / C catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCY02E60/50
Inventor 刘嘉斌王宏涛秦海英董策舟何燕
Owner ZHEJIANG UNIV
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