Titanium dioxide nano composite material as well as preparation method and application thereof

A nanocomposite material, titanium dioxide technology, applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of battery cycle stability and rate performance to be improved, achieve good application prospects, excellent cycle stability and rate performance, make up for The effect of poor conductivity

Pending Publication Date: 2022-01-14
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a titanium dioxide nanocomposite material, preparation method and application to solve the problem that the cycle stability and rate performance of the battery need to be improved in the prior art. The titanium dioxide nanocomposite material provided by the present invention has excellent electrochemical properties performance, the lithium-ion battery made of it has excellent cycle stability and rate performance

Method used

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  • Titanium dioxide nano composite material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] (1) Add NaOH solution (0.5mol / L) dropwise to 25mL ruthenium chloride hydrate solution (0.4mol / L) and stir continuously, adjust the pH to 7, wash once with 10mL NaCl solution (0.6mol / L), After drying, hydrated ruthenium dioxide powder is obtained;

[0026] (2) the ruthenium dioxide hydrate powder is mixed with activated carbon, then polyvinyl alcohol is added and mixed evenly, the mass ratio of ruthenium dioxide hydrate powder, activated carbon and polyvinyl alcohol is 6:4:2, and the ruthenium oxide-activated carbon composite material is obtained;

[0027] (3) Ruthenium oxide-activated carbon composite material is dispersed in dehydrated alcohol, adds titanium sulfate in batches, the mass volume ratio of ruthenium oxide-activated carbon composite material, dehydrated alcohol and titanium sulfate is 5.5g:24mL:6g, for the first time Add 1 / 4 of the total mass of titanium sulfate, stir for 10 minutes, add the remaining titanium sulfate for the second time, stir for 15 minute...

Embodiment 2

[0029] (1) Add NaOH solution (0.4mol / L) dropwise to 30mL ruthenium chloride hydrate solution (0.3mol / L) and stir continuously, adjust the pH to 7, wash once with 5mL NaCl solution (0.5mol / L), After drying, hydrated ruthenium dioxide powder is obtained;

[0030] (2) Mix hydrated ruthenium dioxide powder with activated carbon, then add polytetrafluoroethylene and mix evenly, the mass ratio of hydrated ruthenium dioxide powder, activated carbon and polytetrafluoroethylene is 5:5:1 to obtain ruthenium oxide-activated carbon composite Material;

[0031] (3) ruthenium oxide-activated carbon composite material is dispersed in dehydrated alcohol, adds titanium isopropoxide in batches, the mass volume ratio of ruthenium oxide-activated carbon composite material, dehydrated alcohol and titanium isopropoxide is 5g:30mL:4g, Add 1 / 4 of the total mass of titanium isopropoxide for the first time, stir for 15 minutes, add the rest of titanium isopropoxide for the second time, stir for 20 min...

Embodiment 3

[0033] (1) Add NaOH solution (0.6mol / L) dropwise to 25mL of ruthenium chloride hydrate solution (0.5mol / L) and stir continuously, adjust the pH to 7, wash twice with 15mL of NaCl solution (0.8mol / L), After drying, hydrated ruthenium dioxide powder is obtained;

[0034] (2) hydrated ruthenium dioxide powder is mixed with activated carbon, then add sodium carboxymethyl cellulose, the mass ratio of hydrated ruthenium dioxide powder, activated carbon and sodium carboxymethyl cellulose is 8:3:2, obtains ruthenium oxide- Activated carbon composite materials;

[0035] (3) The ruthenium oxide-activated carbon composite material is dispersed in absolute ethanol, and titanyl difluoride is added in batches, the mass volume ratio of ruthenium oxide-activated carbon composite material, dehydrated alcohol and titanyl difluoride is 6g:20mL:8g, Add 1 / 4 of the total mass of titanyl oxyfluoride for the first time, stir for 12 minutes, add the remaining titanyl oxyfluoride for the second time, ...

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Abstract

The invention discloses a titanium dioxide nano composite material as well as a preparation method and application thereof, and belongs to the technical field of composite material preparation. The method comprises the following steps of: dropwise adding a NaOH solution into a ruthenium chloride hydrate solution, continuously stirring the mixed solution, adjusting the pH to be neutral, performing washing with a NaCl solution, and drying to obtain ruthenium dioxide hydrate powder; mixing the ruthenium dioxide hydrate powder with activated carbon, and adding a binder to obtain a ruthenium oxide-activated carbon composite material; and dispersing the ruthenium oxide-activated carbon composite material in an alcoholic solution, adding a titanium source in batches, and carrying out ultrasonic dispersion and calcination treatment to obtain the titanium dioxide nano composite material. The titanium dioxide nano composite material provided by the invention has excellent electrochemical performance; a lithium ion battery prepared from the titanium dioxide nano composite material has excellent cycling stability and rate capability and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a titanium dioxide nanocomposite material, a preparation method and an application. Background technique [0002] Titanium dioxide has the characteristics of high catalytic activity, large specific surface area, good light absorption, good dispersibility, non-toxicity, and high chemical stability. Preparation of new energy materials and other fields. However, the conductivity of titanium dioxide itself is relatively poor, which limits its application in the field of battery preparation. Patent No. CN109671920A discloses nano-diamond and titanium dioxide hollow sphere composite electrode materials, titanium dioxide is in the state of hollow spheres, and nano-diamond particles are granular and adsorbed on the surface of titanium dioxide hollow spheres. Sealed reaction in the kettle, calcination and other steps, the prepared product has small grain size and ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/583
CPCH01M4/364H01M4/48H01M4/583Y02E60/10
Inventor 熊帮云范振荣郭家进李静静
Owner FOSHAN UNIVERSITY
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