A kind of ordered macroporous titanium dioxide and its preparation method

A titanium dioxide and order technology, applied in the field of order macroporous titanium dioxide and its preparation, can solve the problems of poor conductivity, limited use, low rate capacity, etc., and achieve the effects of improving electronic conductivity, easy hydrolysis, and simple synthesis method.

Inactive Publication Date: 2018-05-11
MCNAIR TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide materials have disadvantages such as poor conductivity and low rate capacity, which limit their use in lithium-ion batteries.

Method used

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  • A kind of ordered macroporous titanium dioxide and its preparation method
  • A kind of ordered macroporous titanium dioxide and its preparation method
  • A kind of ordered macroporous titanium dioxide and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of ordered macroporous titanium dioxide comprises the following steps:

[0029] (1) Preparation of titanium dioxide precursor solution: add 1.0 g of titanium tetrachloride to 50 g of absolute ethanol, stir evenly, then add 0.7 g of titanium tetraisopropoxide while stirring, and stir evenly to obtain a titanium dioxide precursor solution;

[0030] (2) Preparation of PS-COOH sphere suspension: disperse 1.0 g of PS-COOH spheres in 250 W ultrasonic for 2 hours in 10 g of absolute ethanol to obtain PS-COOH sphere suspension, wherein the diameter of PS-COOH spheres is about 200 nanometers;

[0031] (3) Preparation of ordered macroporous titanium dioxide: Mix the titanium dioxide precursor solution and PS-COOH ball suspension together, stir evenly to obtain suspension C, let it stand at room temperature for 36 hours, and dry it in a blast oven at 65°C for 48 hours, The dried product was placed in the center of a high-temperature tube furnace, and the tem...

Embodiment 2

[0042] The preparation method of ordered macroporous titanium dioxide comprises the following steps:

[0043] (1) Preparation of titanium dioxide precursor solution: 0.5 g of titanium tetrachloride was added to 40 g of absolute ethanol, stirred evenly, then 1.5 g of titanium tetraisopropoxide was added while stirring, and stirred evenly to obtain a titanium dioxide precursor solution;

[0044] (2) Preparation of PS-COOH sphere suspension: disperse 1.3g of PS-COOH spheres in 250W ultrasonic for 2 hours in 15g of absolute ethanol to obtain PS-COOH sphere suspension, wherein the diameter of PS-COOH spheres is about 100 nanometers;

[0045] (3) Preparation of ordered macroporous titanium dioxide: Mix the titanium dioxide precursor solution and PS-COOH ball suspension together, stir evenly to obtain suspension C, let it stand at room temperature for 36 hours, and dry it in a blast oven at 65°C for 48 hours, The dried product was placed in the center of a high-temperature tube furna...

Embodiment 3

[0049] The preparation method of ordered macroporous titanium dioxide comprises the following steps:

[0050] (1) Preparation of titanium dioxide precursor solution: 0.8g of titanium tetrachloride was added to 45g of absolute ethanol, stirred evenly, then 1.3g of titanium tetraisopropoxide was added while stirring, and stirred evenly to obtain a titanium dioxide precursor solution;

[0051] (2) Preparation of PS-COOH sphere suspension: disperse 1.2g of PS-COOH spheres in 13g of absolute ethanol by ultrasonication at 250W for 1.5 hours to obtain PS-COOH sphere suspension, wherein the diameter of PS-COOH spheres is 500nm;

[0052] (3) Preparation of ordered macroporous titanium dioxide: Mix the titanium dioxide precursor solution and PS-COOH ball suspension together, stir evenly to obtain suspension C, let it stand at room temperature for 36 hours, and dry it in a blast oven at 65°C for 48 hours, The dried product was placed in the center of a high-temperature tube furnace, and ...

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Abstract

The invention relates to the technical field of electrochemical materials, in particular to a preparation method for an ordered macroporous titanium dioxide, which includes the following steps: titanium halide and hydrolytic titanate are respectively added into absolute ethanol and uniformly agitated, so that titanium dioxide precursor solvent is obtained; carboxylic acid type polystyrene spheres are dispersed into absolute ethanol, so that carboxylic acid type polystyrene sphere suspension is obtained; the titanium dioxide precursor solvent and the carboxylic acid type polystyrene sphere suspension are mixed together and dried in an oven, so that titanium dioxide precursor is obtained, the titanium dioxide precursor is calcined under high temperature, and thereby the ordered macroporous titanium dioxide is obtained. The template method is adopted by the preparation method, the process conditions are simple and easy to control, operability is high, and repeatability is good; the produced product has an ordered macroporous structure, which enlarges the specific surface area of the titanium dioxide and is favorable for the increase of the specific lithium storage capacity of the product and the permeation of electrolyte, consequently, the electronic conductivity of the ordered macroporous titanium dioxide used as a lithium ion electrode material is increased, and moreover, safety is high.

Description

technical field [0001] The invention relates to the technical field of electrochemical materials, in particular to an ordered macroporous titanium dioxide and a preparation method thereof. Background technique [0002] The negative electrode material of lithium-ion batteries is mainly used as the main body of lithium storage, and the insertion and extraction of lithium ions are realized during the charging and discharging process. From the perspective of the development of lithium-ion batteries, the research on negative electrode materials plays an important role in the emergence of lithium-ion batteries. The emergence of commercial carbon materials as negative electrode materials solves the safety problem of metal lithium electrodes, so that lithium-ion batteries can commercial application. In recent years, as the world's energy resources are becoming increasingly tense and environmental protection requirements are getting higher and higher, countries around the world have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M10/0525C01G23/053
CPCC01G23/0536H01M4/48H01M10/0525Y02E60/10
Inventor 周训富宋晓娜邓耀明黄象金屈德扬史亚林沈阳程忠李中延张新河郑新宇
Owner MCNAIR TECH
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