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Preparation method and application of nano molybdenum disulfide/nitrogen-doped carbon nanotube array hybrid composite electrode

A nano-molybdenum disulfide and nanotube array technology, applied in the field of electrode materials, can solve problems such as poor stability, achieve excellent electrical conductivity, small contact resistance, improve charge-discharge capacity and cycle stability.

Active Publication Date: 2019-09-17
清创人和生态工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used combination of nano-molybdenum disulfide and carbon nanotube materials through physical adsorption has poor stability.

Method used

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  • Preparation method and application of nano molybdenum disulfide/nitrogen-doped carbon nanotube array hybrid composite electrode
  • Preparation method and application of nano molybdenum disulfide/nitrogen-doped carbon nanotube array hybrid composite electrode
  • Preparation method and application of nano molybdenum disulfide/nitrogen-doped carbon nanotube array hybrid composite electrode

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Experimental program
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Effect test

Embodiment 1

[0037] The specific implementation of a method for preparing a nanomolybdenum disulfide / nitrogen-doped carbon nanotube array hybrid composite electrode is carried out according to the following steps:

[0038] (1) Preparation of conductive carbon black layer / carbon fiber fabric base material

[0039] Take 1g of acetylene black and 0.036g of ammonium persulfate respectively in a three-necked flask, add 200mL of deionized water, mechanically stir in a constant temperature water bath at 30°C for 20h, filter with suction, wash, and vacuum dry at 80°C for 24h, then the acetylene black The oxidation of the carbon paper is completed; in order to remove the impurities on the surface of the carbon paper, the carbon paper is cut into a size of 3 × 3 cm and then immersed in isopropanol solution, 80Hz ultrasonic 20min to remove the impurities on the surface of the carbon paper, take out and dry; take 0.08g to oxidize Acetylene black, 6.06g of ferric nitrate and 15g of acidic silica sol wi...

Embodiment 2

[0052] (1) Preparation of conductive carbon black layer / carbon fiber fabric base material

[0053] Take 1g of conductive carbon black and 0.072g of ammonium nitrate in a three-necked flask, add 150mL of deionized water, stir mechanically in a constant temperature water bath at 25°C for 18h, filter with suction, wash, and vacuum dry at 80°C for 24h, then the conductive carbon The black oxidation is completed; in order to remove the impurities on the surface of the carbon cloth, the carbon cloth is cut into a size of 3 × 3 cm and dipped in an ethanol solution, and the impurities on the surface of the carbon cloth are removed by ultrasonication at 100Hz for 30 minutes, then taken out and dried; take 0.1g of the oxidized Conductive carbon black, 2g of nickel nitrate and 20g of alkaline silica sol with a mass fraction of 35% were stirred at room temperature for 24 hours to make a suspension; after the surface of the carbon cloth was cleaned, the suspension was evenly applied to one ...

Embodiment 3

[0061] (1) Preparation of conductive carbon black layer / carbon fiber fabric base material

[0062] Take 1g of conductive graphite and 0.018g of ammonium chlorate in a three-necked flask, add 230mL of deionized water, stir mechanically in a constant temperature water bath at 35°C for 20h, filter with suction, wash, and vacuum dry at 70°C for 30h, then the conductive graphite The oxidation of the carbon felt is completed; in order to remove the impurities on the surface of the carbon felt, the carbon felt is cut into a size of 3×3 cm and immersed in a methanol solution, and the impurities on the surface of the carbon felt are removed by ultrasonication at 100 Hz for 20 minutes, then taken out and dried; take 0.1 g of the oxidized conductive Graphite, 3g of nickel acetate and 15g of acidic silica sol with a mass fraction of 40% were stirred at room temperature for 30 hours to form a suspension; after the surface of the carbon felt was cleaned, the suspension was evenly applied to ...

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Abstract

The invention discloses a preparation method of a nano molybdenum disulfide / nitrogen-doped carbon nanotube array hybrid composite electrode. A carbon fiber fabric coated with a conductive carbon black layer is used as a substrate; a nitrogen-doped carbon nano tube array carrier is controllably prepared on a carbon fiber substrate through a chemical vapor deposition technology; then nitrogen-doped carbon nano tubes are oxidized to realize surface functionalization; and then the nitrogen-doped carbon nano tubes are firmly combined with a nano molybdenum disulfide material in a chemical bond form to form an electrode material with an integrated three-dimensional parallel hole structure and a bidirectional catalysis function. According to the invention, the carrier provided by the invention has excellent conductivity and relatively high mass transfer and load transfer capabilities; the nano molybdenum disulfide material combined by chemical bonds has good bidirectional catalytic activity of oxygen electroreduction and oxygen anion electrooxidation; the diffusion resistance and ion transmission resistance of oxygen species are reduced; the electrochemical activity and the structural stability of an electronic conductor are improved; and the preparation method has wide application prospects in electrode materials such as metal-air batteries, proton exchange membrane hydrogen fuel cells and direct methanol fuel cells.

Description

technical field [0001] The invention relates to a preparation method of a nanomolybdenum disulfide / nitrogen-doped carbon nanotube array hybrid composite electrode, belongs to the technical field of electrode materials, and is mainly used in metal-air batteries, proton exchange membrane hydrogen fuel cells and direct methanol fuel cells and other electrode materials. Background technique [0002] Metal-air batteries, especially lithium-air batteries, have the advantages of high theoretical energy density, environmental friendliness, low production cost, and high power generation efficiency, and are considered to be ideal high-energy clean power sources for hybrid and electric vehicles. However, the actual energy density and cycle life (rapid capacity decay) of this type of battery are low, which has become a key issue limiting its commercial development. Therefore, the development of three-dimensional porous electrodes with high catalytic activity has become the current rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86H01M4/90H01M12/08H01M8/10H01M8/1011B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/8605H01M4/8803H01M4/885H01M4/8867H01M4/9083H01M8/10H01M8/1011H01M12/08Y02E60/50
Inventor 李瑜刘世斌王昆磊王俊文段东红张忠林郝晓刚
Owner 清创人和生态工程技术有限公司
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