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Preparation method of metal oxide nanosheet and carbon nanotube composite energy-storage material

A carbon nanotube composite, carbon nanotube technology, applied in electrochemical generators, electrical components, battery electrodes, etc., can solve problems such as lack, and achieve the effects of good conductivity, high specific surface area, rich species and properties

Active Publication Date: 2014-07-23
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still a lack of an effective and universal method to prepare CNTs-based nanostructured composites with controllable inorganic composition, content, and microstructure.

Method used

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  • Preparation method of metal oxide nanosheet and carbon nanotube composite energy-storage material
  • Preparation method of metal oxide nanosheet and carbon nanotube composite energy-storage material
  • Preparation method of metal oxide nanosheet and carbon nanotube composite energy-storage material

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Embodiment 1

[0019] This embodiment includes the following steps:

[0020] The first step: Weigh 0.4 mg of carbon nanotubes with hydroxyl groups into a flask, add 60 mL of acetone, ultrasonically disperse for 5 minutes, then add 0.8 mg of maleic anhydride, and stir and react at 25 ° C for 10 hours to obtain modified carbon nanotubes, and washed 4 times with acetone;

[0021] Step 2: Weigh 0.127g of modified carbon nanotubes, add to 30mL of anhydrous toluene solution, ultrasonically disperse for 10 minutes, and record it as liquid A; add 80mg of azobisisobutylcyanide to 3.82g of styrene Inside, ultrasonic for 10 minutes, recorded as solution B; mix solution A and solution B, stir and react at 70°C for 7 hours under nitrogen atmosphere, to obtain carbon nanotubes modified with polystyrene layer, wash with ethanol 5 times;

[0022] Step 3: Weigh 30 mg of carbon nanotubes modified with a polystyrene layer, add them to 50 mL of concentrated sulfuric acid with a concentration of 98%, disperse u...

Embodiment 2

[0027] This embodiment includes the following steps:

[0028] Step 1: Weigh 2mg of carbon nanotubes with hydroxyl groups into a flask, add 300mL of acetone, ultrasonically disperse for 5 minutes, then add 4mg of maleic anhydride, stir and react at 25°C for 10 hours to obtain modified carbon nanotubes tube and washed 4 times with acetone;

[0029] Step 2: Weigh 0.635g of modified carbon nanotubes, add them to 150mL of anhydrous toluene solution, ultrasonically disperse for 10 minutes, and record it as liquid A; add 400mg of azobisisobutylcyanide to 19.1g of styrene Inside, ultrasonic for 10 minutes, recorded as solution B; mix solution A and solution B, stir and react at 70°C for 9 hours under a nitrogen atmosphere, to obtain carbon nanotubes modified with polystyrene layer, wash with ethanol 5 times;

[0030] Step 3: Weigh 150 mg of carbon nanotubes modified with polystyrene layer, add them to 200 mL of concentrated sulfuric acid with a concentration of 98%, ultrasonically di...

Embodiment 3

[0035] This embodiment includes the following steps:

[0036] The first step: Weigh 4 mg of carbon nanotubes with hydroxyl groups into a flask, add 500 mL of acetone, ultrasonically disperse for 10 minutes, then add 8 mg of maleic anhydride, and stir and react at 25 ° C for 10 hours to obtain modified carbon nanotubes tube and washed 4 times with acetone;

[0037] Step 2: Weigh 1.27g of modified carbon nanotubes, add them to 300mL of anhydrous toluene solution, ultrasonically disperse for 10 minutes, and record it as liquid A; add 800mg of azobisisobutylcyanide to 38.2g of styrene Inside, ultrasonic for 10 minutes, recorded as B solution; Mix A and B, stir and react at 70°C under nitrogen atmosphere for 10 hours, to obtain carbon nanotubes modified with polystyrene layer, wash with ethanol 5 times;

[0038] Step 3: Weigh 300 mg of carbon nanotubes modified with a polystyrene layer, add them to 500 mL of concentrated sulfuric acid with a concentration of 98%, ultrasonically di...

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Abstract

The invention discloses a preparation method of a metal oxide nanosheet and carbon nanotube composite energy-storage material. The preparation method comprises the following steps: firstly, modifying a carbon nanotube by sulfonated polystyrene; secondly, growing a metal hydroxide precursor on the modified carbon nanotube by adopting an oil bath process; and finally, calcining the precursor in the atmosphere of nitrogen gas, thereby obtaining the metal oxide nanosheet and carbon nanotube composite energy-storage material. The preparation method is characterized in that the composite energy-storage material is prepared by adopting a simple chemical synthesis means and has a high specific surface area and the good conductivity, and both the capacity and the stability of the energy-storage material are superior to those of a traditional metal oxide nanosheet and carbon nanotube composite energy-storage material.

Description

technical field [0001] The present invention relates to the preparation of energy storage materials, in particular to a method for preparing a composite energy storage material of metal oxide nanosheets and carbon nanotubes, specifically involving zinc oxide, nickel oxide, tricobalt tetroxide, ferric oxide, triferrous oxide, Preparation of manganese dioxide, zinc manganate, iron manganate, cobalt manganate, nickel manganate and nickel cobaltite nanosheets and carbon nanotube composites. technical background [0002] As a new type, clean and rechargeable power source, lithium-ion battery has the advantages of high working voltage, high energy density, light weight and low self-discharge rate, and has been widely used in portable electronic devices such as mobile phones and notebook computers. . The widely used electrode material in lithium ion has been optimized for many years, and its performance has reached its limit. The main goal in the development of next-generation li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48
CPCH01M4/366H01M4/483H01M4/587H01M10/0525Y02E60/10
Inventor 丁书江周晗
Owner XI AN JIAOTONG UNIV
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