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Preparation method for nitrogen-doped carbon nanotube array/carbon fiber material air electrode

A carbon fiber material, nanotube array technology, applied in the direction of fuel cell type half-cell and primary battery type half-cell, etc., can solve the problems of low catalytic activity, high chemical inertness, high contact resistance, etc.

Inactive Publication Date: 2017-09-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, further studies have found that the pure carbon nanotube array has a relatively complete surface structure and high chemical inertness, while the physical mixture of carbon nanotubes and catalysts has a large contact resistance, which leads to the two reactions of oxygen electroreduction and oxygen anion electrooxidation. The catalytic activity of each reaction is low

Method used

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  • Preparation method for nitrogen-doped carbon nanotube array/carbon fiber material air electrode
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  • Preparation method for nitrogen-doped carbon nanotube array/carbon fiber material air electrode

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Experimental program
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Effect test

Embodiment 1

[0054] The specific implementation of a nitrogen-doped carbon nanotube array / carbon fiber material air electrode preparation method is carried out according to the following steps:

[0055] (1) Pretreatment of carbon paper

[0056] 1 g of conductive carbon black and 0.036 g of ammonium persulfate were added to 200 mL of deionized water, mechanically stirred in a constant temperature water bath at 30 °C for 20 h, filtered with suction, washed, and then vacuum-dried at 80 °C for 24 h to obtain oxidized conductive carbon black. Carbon black; Weigh the above-mentioned 0.08 g oxidized conductive carbon black and 6 g ferric nitrate and add them to 15 g of 30% silica sol solution respectively, and stir at room temperature for 18 h to obtain uniform black suspension ink; the conductive carbon paper Immerse in 100 mL of isopropanol solution, ultrasonically clean at 100 Hz for 20 min to remove impurities on the surface, take it out and dry it; then use a scraper to gently scrape off the...

Embodiment 2

[0062] (1) Pretreatment of carbon cloth

[0063]Add 1 g of conductive graphite and 0.072 g of ammonium nitrate to 150 mL of deionized water respectively, mechanically stir in a constant temperature water bath at 25°C for 10 h, filter with suction, wash, and then vacuum-dry at 60°C for 36 h to obtain oxidized conductive graphite; Weigh 0.1 g of the above oxidized conductive graphite and 3 g of cobalt carbonate and add them to 10 g of 30% silica sol solution, stir at room temperature for 15 h to obtain a uniform black suspension ink; immerse the conductive carbon cloth in 50 mL In methanol solution, ultrasonically clean at 100 Hz for 30 minutes to remove impurities on the surface, take it out and dry it; then gently scrape off the burrs on the surface of the carbon cloth with a scraper, and drop a small amount of the above ink onto the carbon cloth with a disposable dropper , the glass rod is rolled and spread evenly, and finally the excess ink on the surface is gently scraped o...

Embodiment 3

[0069] (1) Pretreatment of carbon felt

[0070] 1 g of conductive activated carbon and 0.018 g of ammonium chlorate were added to 220 mL of deionized water, mechanically stirred in a constant temperature water bath at 40 °C for 40 h, suction filtered, washed, and then vacuum-dried at 90 °C for 24 h to obtain oxidized conductive activated carbon ; The above-mentioned 0.3g oxidized conductive activated carbon and 7 g nickel phosphate were added to 20 g of 30% silica sol solution respectively, and stirred at room temperature for 30 h to obtain uniform black suspension ink; the conductive carbon felt was immersed in 300 mL of ethanol solution, ultrasonically cleaned at 100 Hz for 40 min to remove impurities on the surface, took it out and dried it; then gently scraped off the burrs on the surface of the carbon felt with a scraper, and dropped a small amount of the above ink onto the carbon felt with a disposable dropper. On the felt, the glass rod is rolled and spread evenly, and ...

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Abstract

The invention discloses a preparation method for a nitrogen-doped carbon nanotube array / carbon fiber material air electrode. According to the method, a conductive carbon layer which is coated on one side surface of a carbon fiber material and contains thermocatalytic vapor deposition catalyst precursor is taken as a substrate, and the nitrogen-doped carbon nanotube array with high distribution density is deposited on the substrate, thereby forming a three-dimensional porous air electrode which has catalytic activity for two pieces of reaction: oxygen electro-reduction and oxygen negative ion electro-oxidization. The air electrode prepared by the method has a structure approximate to a linear pore, relatively high specific surface area, relatively high oxygen electro-reduction and oxygen negative ion electro-oxidization catalytic activity and excellent electronic conductivity and mechanical strength, is an ideal air electrode material for preparing a high-capacity new-type metal air battery and is a catalytic active matter carrier material for preparing a fuel battery cathode and anode.

Description

technical field [0001] The invention relates to a method for preparing a nitrogen-doped carbon nanotube array / carbon fiber material electrode, in particular to a method for preparing a nitrogen-doped carbon nanotube array / carbon fiber material air electrode, the air electrode has approximately linear pores structure, large specific surface area, high catalytic activity for oxygen electroreduction and oxygen anion electrooxidation, and excellent electronic conductivity and mechanical strength. Background technique [0002] Lithium-air batteries have the advantages of high energy density, environmental friendliness, low production cost, and high power generation efficiency, and are considered to be ideal high-energy and clean power sources for hybrid electric vehicles (PHEV) or pure electric vehicles (PEV). However, in the commercial development, the actual energy density and cycle life (capacity fading) of the air electrode are low, which has become a key issue limiting the d...

Claims

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Application Information

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IPC IPC(8): H01M12/06
CPCH01M12/06
Inventor 李瑜张忠林刘世斌韩云霞段东红郝晓刚卫国强
Owner TAIYUAN UNIV OF TECH
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