Preparation method for carbon nanofiber electrode material

A nanofiber and electrode material technology, applied in the field of nanometer electrode material preparation, can solve the problem of difficulty in filling the liquid phase, and achieve the effect of increasing the film thickness

Active Publication Date: 2014-02-12
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the template method also has its limitations. For one-dimensional nanomaterials with extremely small nanopore sizes, it is often difficult to complete the filling due to factors such as the surface tension of the liquid phase and the gas seal phenomenon. At the same time, it is also necessary to consider that the precursor cannot react with the template. The synthetic method still needs further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Chemical pretreatment: Put the aluminum sheet with a thickness of 300 μm and a purity of 99.5% into a mixed solution of ethanol, dichloromethane and acetone (the weight percentage is 1:2:1), and put it into an ultrasonic cleaner for ultrasonic cleaning for 5 Minutes, then rinsed with deionized water, dried at 100°C for later use;

[0032] 2) Annealing: constant temperature annealing treatment at 450°C for 1.5 h;

[0033] 3) Polishing:

[0034] Electrochemical polishing: use a mixture of perchloric acid and absolute ethanol as the electrolytic polishing solution to electrochemically polish the sample to obtain a bright and non-slip surface;

[0035] Solution: HClO 4 and C 2 h 5 OH (its volume ratio is 1:4)

[0036] Temperature: 5~10°C

[0037] Voltage: 18-20V

[0038] Polishing time: 2 min

[0039] Chemical polishing:

[0040] Solution: H 3 PO 4 , H 2 SO 4 and HNO 3 (Its volume ratio is 15:3:2)

[0041] Temperature: 100~120℃ (boiling)

[0042] Time: 30...

Embodiment 2

[0048] 1) Chemical pretreatment: Put the aluminum sheet with a thickness of 300 μm and a purity of 99.5% into a mixed solution of ethanol, dichloromethane and acetone (the weight percentage is 1:2:1), and put it into an ultrasonic cleaner for ultrasonic cleaning for 15 minutes. Minutes, then rinsed with deionized water, dried at 100°C for later use;

[0049] 2) Annealing: constant temperature annealing treatment at 450°C for 2 h;

[0050] 3) polishing: same as embodiment 1;

[0051] 4) Anodizing: the cathode is stainless steel plate, the surface area ratio of cathode and anode is controlled at 3:1, the mixed acid formed by phosphoric acid and oxalic acid is used as the electrolyte, and the aqueous solution of ethylene glycol (V alcohol: V water = 1:1) is used as Solvent, the concentration range of phosphoric acid in the electrolyte is 0.3mol / L, and the concentration range of oxalic acid is 0.2mol / L; the voltage value is controlled at 110V, the temperature is controlled at 20°C,...

Embodiment 3

[0056] 1) Chemical pretreatment: Put the aluminum sheet with a thickness of 300 μm and a purity of 99.5% into a mixed solution of ethanol, dichloromethane and acetone (the weight percentage is 1:2:1), and put it into an ultrasonic cleaner for ultrasonic cleaning for 15 minutes. Minutes, then rinsed with deionized water, dried at 100°C for later use;

[0057] 2) Annealing: constant temperature annealing treatment at 450°C for 2 h;

[0058] 3) polishing: same as embodiment 1;

[0059] 4) Anodizing: the cathode is stainless steel plate, the surface area ratio of cathode and anode is controlled at 2:1, the mixed acid formed by phosphoric acid and oxalic acid is used as the electrolyte, and the aqueous solution of ethylene glycol (V alcohol: V water = 1:1) is used as Solvent, the concentration range of phosphoric acid in the electrolyte is 0.3mol / L, and the concentration range of oxalic acid is 0.2mol / L; the voltage value is controlled at 120V, the temperature is controlled at 15°...

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Abstract

The invention relates to a preparation method for a carbon nanofiber electrode material, and particularly relates to a technology for preparing high-hardness large-aperture thick film as a nanofiber template through mixed acid. Hexagonal scrobiculate porous nano alumina templates distributed orderly are prepared by adopting the method; and through the method, the anode oxidization temperature can be greatly improved, the voltage value in electrolysis can be reduced, and more energy can be saved; at room temperature, fast response time and higher sensitivity can be obtained when a gas sensor of a compound thin film produced by nickel/hollow carbon nanofiber obtained by adopting the method is used for detecting NOx gas.

Description

technical field [0001] The invention relates to a method for preparing a carbon nanofiber electrode material, in particular to a process for preparing a high-hardness and large-aperture thick film with a mixed acid as a nanofiber template, and belongs to the field of nanometer electrode material preparation. Background technique [0002] There is a huge demand for clean and efficient electrical energy storage in today's world. And nanomaterials will play a vital role in improving our current energy storage technologies. After the material is nanosized, some chemical reactions that cannot be realized on micron-scale materials can be realized on electrodes. Carbon nanofibers refer to carbon fibers with a nanoscale. According to their structural characteristics, they can be divided into hollow carbon nanofibers (ie, carbon nanotubes) and solid carbon nanofibers. Both have the characteristics of high strength, light weight, good thermal conductivity and high electrical conduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/10C25D11/16C25D11/18B82Y40/00D01F9/12
Inventor 裴玉杰张运山陈刚张浩范希明董军徐建国李险峰
Owner STATE GRID CORP OF CHINA
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