Polyacid/polyaniline/carbon nano tube electrode material as well as preparation method and application thereof

A technology of multi-walled carbon nanotubes and electrode materials, applied in battery electrodes, hybrid capacitor electrodes, circuits, etc., can solve the problems of poor dispersion and easy agglomeration of carbon nanotubes, and achieve improved cycle stability, good performance, and discharge ratio Effect of Capacity and Rate Capacity Improvement

Active Publication Date: 2015-02-04
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersion of carbon nanotubes is poor (easy to agglomerate), and it is difficult to effectively solve the dispersion problem of multi-carbon nanotubes

Method used

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  • Polyacid/polyaniline/carbon nano tube electrode material as well as preparation method and application thereof
  • Polyacid/polyaniline/carbon nano tube electrode material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Preparation of composite materials of polyaniline and multi-walled carbon nanotubes by in situ synthesis method:

[0023] a. At 80°C, reflux 1g of multi-walled carbon nanotubes in 200mL of 6mol / L hydrochloric acid solution for 12h, then centrifuge and wash with deionized water until the filtrate is neutral, and finally dry it in a vacuum oven at 120°C 12 hours standby;

[0024] b. Ultrasonic dispersion of 150 mg of multi-walled carbon nanotubes treated in step a in 200 mL of hydrochloric acid solution with a concentration of 1 mol / L for 2 hours; then add 1050 μL of aniline to continue ultrasonic dispersion for 3 hours; finally add 75 mL dropwise at a temperature of 0- Ammonium persulfate solution at 5°C, the concentration of the ammonium persulfate solution is 1mol / L, and the solvent is a hydrochloric acid solution of 1mol / L;

[0025] c. After the dropwise addition, continue to react at 0-5°C for 5 hours, filter, wash with ethanol until the filtrate is colorless, an...

Embodiment 2

[0036] 1) Preparation of composite materials of polyaniline and multi-walled carbon nanotubes by in situ synthesis method:

[0037] a. At 80°C, reflux 1g of multi-walled carbon nanotubes in 6mol / L hydrochloric acid solution for 12h, then centrifuge and wash with deionized water until the filtrate is neutral, and finally dry it in a vacuum oven at 120°C for 12 hours for later use ;

[0038]b. Ultrasonic dispersion of 150 mg of multi-walled carbon nanotubes treated in step a in 200 mL of hydrochloric acid solution with a concentration of 1 mol / L for 2 hours; then add 1050 μL of aniline to continue ultrasonic dispersion for 3 hours; finally add 75 mL dropwise at a temperature of 0- Ammonium persulfate solution at 5°C, the concentration of the ammonium persulfate solution is 1mol / L, and the solvent is a hydrochloric acid solution of 1mol / L;

[0039] c. After the dropwise addition, continue to react at 0-5°C for 5 hours, filter, wash with ethanol until the filtrate is colorless, a...

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Abstract

The invention discloses a preparation method of a series of polyacid, polyaniline and carbon nano tube electrode materials and application of the polyacid, polyaniline and carbon nano tube electrode materials to lithium ion batteries and super-capacitors. According to the technical scheme, the preparation method comprises the following steps: firstly, carrying out ultrasonic dispersion on a multi-wall carbon nano tube in hydrochloric acid; adding aniline and ammonium persulfate which are dissolved into hydrochloric acid for carrying out in-situ synthesis, so as to uniformly cover the multi-wall carbon nano tube with polyaniline; assembling polyacid on a polyaniline and carbon nano tube composite material by electrostatic bonding; and finally, forming an electrode material based on a polyacid / polyaniline / carbon nano tube. Compared with a reported polyaniline and carbon nano tube composite material and a pure carbon nano tube, the electrode material prepared by adopting the preparation method is used as a negative electrode of a lithium ion battery, so that the circulating stability is remarkably improved, and the discharging specific capacity and the speed capacity are obviously increased.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic-organic electrode materials, and in particular relates to a series of preparation methods of polyacid, polyaniline and carbon nanotube electrode materials and their application in lithium ion batteries and supercapacitors. Background technique [0002] Polyacid compounds are a class of multimetal oxides containing V, Mo, W and other metals. Isopolyanions formed by the condensation of the same oxoacid ions are called isopolyacids. The condensation of different types of oxyacid anions is called heteropolyanion, and the acid is called heteropolyacid. At present, it is known that the atoms of nearly 70 kinds of elements can be used as heteroatoms in heteropolyacids, including all the first series transition elements, almost all the second and third series transition elements, plus B, Al, Ga, Si , Ge, Sn, P, As, Sb, Bi, Se, Te, I, etc. And each heteroatom can often exist in heteropo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/137H01M4/133H01M4/1393H01M4/1399
CPCH01G11/36H01G11/48H01M4/133H01M4/137H01M4/1393H01M4/1397H01M4/583H01M4/602H01M10/0525Y02E60/10Y02E60/13
Inventor 宋宇飞贾飞飞陈伟
Owner BEIJING UNIV OF CHEM TECH
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