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Method for manufacturing anode of direct sodium borohydride fuel cell

A sodium borohydride, fuel cell technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of reducing the effective contact area between the catalyst and the sodium borohydride electrolyte, reducing the electrochemical catalytic performance of the electrode, etc., to achieve electrochemical catalysis The effect of excellent activity, favorable for popularization and use, and simple process

Pending Publication Date: 2022-03-01
BAOTOU RES INST OF RARE EARTHS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is a hydrophilic or hydrophobic binder, it will reduce the effective contact area between the catalyst and the sodium borohydride electrolyte, and reduce the electrochemical catalytic performance of the electrode.

Method used

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  • Method for manufacturing anode of direct sodium borohydride fuel cell
  • Method for manufacturing anode of direct sodium borohydride fuel cell
  • Method for manufacturing anode of direct sodium borohydride fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] La 15 Fe 4 Ni 72 mn 7 B 2 The hydrogen storage alloy is broken under the protection of the atmosphere, and the alloy powder with a particle size of ≤75 microns is sieved to obtain the alloy powder with a particle size of ≤75 microns; add the alloy powder with a particle size of ≤75 microns into the plasma spraying feed chamber;

[0061] Foam nickel (thickness 1.3mm, surface density 420g.m -2 ) is fixed on the spraying rotating mechanism;

[0062] Adjust the spraying voltage to 64.4V, the spraying current to 500A, the argon gas flow rate to 400L / h, the speed of the feeder to 0.2r / min, start spraying, and finish spraying after 50 times of spraying; wait until the nickel foam loaded with hydrogen storage alloy powder is cooled Finally, the nickel foam was removed from the spraying rotary mechanism to complete the spraying.

[0063] Table 1 Comparison of the amount of hydrogen storage alloy loaded by coating method and plasma spraying method

[0064] Electr...

Embodiment 2

[0070] La 15 Fe 4 Ni 72 mn 7 B 2 The hydrogen storage alloy is broken under the protection of the atmosphere, and the alloy powder with a particle size of ≤75 microns is sieved to obtain the alloy powder with a particle size of ≤75 microns; add the alloy powder with a particle size of ≤75 microns into the plasma spraying feed chamber;

[0071] Foam copper (thickness 1.5mm, surface density 400g.m -2 ) is fixed on the spraying rotating mechanism;

[0072] Adjust the spraying voltage to 64.4V, the spraying current to 500A, the flow rate of argon to 400L / h, the speed of the feeder to 0.2r / min, start spraying, and finish spraying after 50 times of spraying; wait until the copper foam loaded with hydrogen storage alloy powder is cooled Finally, the copper foam is removed from the spraying rotary mechanism to complete the spraying.

[0073] Table 2 Comparison of the amount of hydrogen storage alloy loaded by the coating method and the plasma spraying method

[0074] ...

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Abstract

The invention discloses a method for manufacturing an anode of a direct sodium borohydride fuel cell. The method comprises the following steps: crushing a hydrogen storage alloy in a protective atmosphere, and screening to obtain alloy powder with the particle size of less than 75 microns; alloy powder is attached to the conductive current collector through a plasma spraying method. When the DBFC anode is manufactured, no adhesive is added, so that the contact area between the catalyst hydrogen storage alloy powder and the electrolyte is increased, and the electrochemical performance of the fuel cell is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a method for making an anode of a direct sodium borohydride fuel cell. Background technique [0002] A fuel cell is a device that mainly performs a redox reaction with oxygen or other oxidants to convert the chemical energy in the fuel into electrical energy. After the fuel cell generates electricity, it will produce water, heat and possibly a very small amount of carbon dioxide (depending on the fuel). Compared with fossil fuel electricity generation, it is a kind of green energy. The energy efficiency of fuel cells is typically between 40-60%. [0003] As early as the 1960s, it was proposed to use NaBH 4 Conceived as a fuel cell. Sodium borohydride (NaBH 4 ) is a white crystalline substance with a relative density of 1.074 and a faint pungent odor. It has high thermal stability and decomposes at 400°C under vacuum. Stable in dry air, hygroscopic and easy to...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M8/083
CPCH01M4/8803H01M4/886H01M4/9041H01M8/083Y02E60/50Y02P70/50
Inventor 李金许亚茹赵玉园蒙丽娟王利李红喜周淑娟安杰张旭杨鹏宇李宝犬徐津闫慧忠
Owner BAOTOU RES INST OF RARE EARTHS
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