Carbon nanometer pipe high energy storage battery negative pole material and is preparation method

A carbon nanotube and battery negative electrode technology is applied in the field of carbon nanotube high energy storage battery negative electrode material and its preparation, and achieves the effects of high hydrogen storage performance, superior performance and stable discharge platform

Inactive Publication Date: 2004-10-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All carbon nanotubes in these studies have not undergone surface modification, and their hydrogen storage capacity and performance need to be further improved.

Method used

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  • Carbon nanometer pipe high energy storage battery negative pole material and is preparation method
  • Carbon nanometer pipe high energy storage battery negative pole material and is preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The pristine carbon nanotubes were soaked in HF solution for 24h, after cleaning, in concentrated H 2 SO 4 : Concentrated HNO 3 (1:1) mixed solution was boiled for 30 minutes to remove particulate impurities such as amorphous carbon, and at the same time, the end caps closed by carbon nanotubes were opened, and then rinsed with deionized water until neutral. CuSO 4 The solution is mixed with multi-walled carbon nanotubes and complexing agent (potassium sodium tartrate tetrahydrate), and the pH of the solution is adjusted, and then the reducing agent formaldehyde solution is titrated into the copper complexing solution to remove Cu 2+ reduction. By changing the CuSO in the solution 4 The concentration of the resulting deposited nano-copper in the whole copper-deposited multi-walled carbon nanotubes is controlled. Controlling the drop rate of reducing agent can effectively control the particle size of copper particles. These functional groups on the surface of carbo...

Embodiment 2

[0027] The experimental conditions are the same as in Example 1, and the copper-modified carbon nanotubes used in Implementation 1 are changed to copper-modified carbon nanotubes with a weight ratio of carbon nanotubes and copper of 1:1, and other substances are mixed in the same proportion to make electrodes The material is tested for electrochemical hydrogen storage, and the measured specific electricity can reach 1200mAh / g.

Embodiment 3

[0029] The experimental conditions were changed as follows, and the rest were the same as in Example 1.

[0030] The complexing agent used in the preparation of carbon nanotubes in Example 1 was changed to sodium thiosulfate.

[0031] The modified carbon nanotubes used to prepare the electrodes are copper-modified carbon nanotubes with a weight ratio of carbon nanotubes and copper of 1:5, and other substances are mixed in the same ratio and the same method to make electrode materials, and the electrochemical hydrogen storage test is carried out. The specific power can reach 1690mAh / g.

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Abstract

The invented material contains wt ratio 2-5:1 of nano-carbon tube modified by copper and agglomerant of teflon, and conduction agent, which is 1% of total weight. Preparing method includes following steps: after dipping in HF solution, nano-carbon tube in concentrated H2SO4 and HNO3 is boiled; rinsing tube till neutrality by using deionized water; even mixing CuSO4 solution, nano-carbon tube and complexing agent, adjusting pH of solution by sodium hydroxide; titration is carried out by using formalin till Cu2+ is deoxidized from copper complexation solution; mixing nano-carbon tube of deposited metal granules, Teflon and acetylene black fabricates slurry; coating slurry on foam nickel, drying and chill pressing produces electrode material. Performances of the material are high capability of storing hydrogen, specific capacitance 1200-1710mAh / g and stable charging and discharging capability.

Description

technical field [0001] The invention relates to a carbon nanotube high energy storage battery negative electrode material and a preparation method thereof, belonging to the technical fields of carbon nanotube material application and electrochemical hydrogen storage. Background technique [0002] The use of hydrogen energy is pollution-free, zero-emission, and high-efficiency, and is recognized as one of the green energy sources. The key problem hindering the large-scale use of hydrogen energy is the storage and transportation of hydrogen energy. There are many ways to store hydrogen energy, and the practical application of hydrogen energy is limited due to the disadvantages of various storage methods. [0003] Carbon nanotubes (CNTs) have a unique structure, large specific surface area, multiple hydrogen storage locations (tube outer wall, inner wall, and tube middle), and high hydrogen storage weight density, so they have good application prospects. The electrochemical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01M4/62
CPCY02E60/10
Inventor 刘靖毛宗强潘文钰
Owner TSINGHUA UNIV
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