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A large specific surface porous rutile tio 2 Preparation and Application of Mesoscopic Crystals

A mesoscopic crystal and large specific surface technology, applied in the field of battery materials, can solve the problems of rising lithium prices and low lithium resource reserves, and achieve high specific capacity, excellent cycle performance, and good cycle stability.

Inactive Publication Date: 2016-08-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the continuous popularization of lithium-ion batteries, the price of lithium (lithium carbonate) continues to rise, and the reserves of lithium resources in the earth are also less
There is no rutile TiO 2 Related Patent Reports Applied in Sodium-ion Batteries

Method used

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  • A large specific surface porous rutile tio <sub>2</sub> Preparation and Application of Mesoscopic Crystals
  • A large specific surface porous rutile tio <sub>2</sub> Preparation and Application of Mesoscopic Crystals
  • A large specific surface porous rutile tio <sub>2</sub> Preparation and Application of Mesoscopic Crystals

Examples

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Embodiment 1

[0018] A kind of porous rutile TiO with large surface area 2 Preparation method of mesoscopic crystals: Disperse 0.9 g of sodium cetylbenzene sulfonate in 35 ml of 2.5 mol / l hydrochloric acid solution, then add 0.8 ml of isopropyl titanate dropwise, and react at 70 ℃ for 24 h After centrifugal washing and drying, a white product is obtained; and finally annealed at 390℃ for 1h to obtain the final product; the purity is 96%.

Embodiment 2

[0020] A kind of porous rutile TiO with large surface area 2 Preparation method of mesoscopic crystals: Disperse 1.2 g of sodium cetylbenzene sulfonate in 60 ml of 2.0 mol / l hydrochloric acid solution, then add 1.0 ml of isopropyl titanate dropwise, and react at 80°C for 18 h After centrifugal washing and drying, a white product is obtained; finally, annealed at 420℃ for 2h to obtain the final product; the purity is 95%.

Embodiment 3

[0022] A kind of porous rutile TiO with large surface area 2 Preparation method of mesoscopic crystals: Disperse 1.0 g of sodium cetylbenzene sulfonate in 45 ml of 2.3 mol / l hydrochloric acid solution, then add 1.2 ml of isopropyl titanate dropwise, and react at 85 ℃ for 12 h After centrifugal washing and drying, a white product is obtained; finally, annealed at 400 ℃ for 1.5 h to obtain the final product; the purity is 97%.

[0023] The porous rutile TiO prepared in the example 2 Analysis of mesoscopic crystals, scanning electron microscopy and transmission observation results show that this rutile TiO 2 The particle size of the mesoscopic crystal is 100-130 nm. It is formed by very tiny nanocrystals (3-5 nm) and has a porous morphology; the electron diffraction pattern (see figure 2 b Inset) shows that the entire particle has a single-crystal diffraction structure, indicating that these small nanocrystalline units are arranged in a highly orderly manner, confirming that it is a ...

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Abstract

The invention belongs to the field of battery materials, and in particular relates to the preparation and application of a large specific surface porous rutile TiO2 mesoscopic crystal. The present invention uses sodium hexadecylbenzenesulfonate and isopropyl titanate as raw materials, and reacts at 70°C-85°C for 12-24 h to synthesize for the first time high-purity (above 95%) porous tetragonal rutile TiO2 medium View crystals. The rutile TiO2 mesoscopic crystals have a particle size of 100‑130 nm and a porous morphology. It is applied to the negative electrode material of sodium ion battery, and it is found that it has good sodium storage performance, and has a very good application prospect in the application of sodium ion battery.

Description

technical field [0001] The invention belongs to the field of battery materials, in particular to a large specific surface porous rutile TiO 2 Preparation and application of mesoscopic crystals. Background technique [0002] Rutile is relatively pure titanium dioxide, which generally contains more than 95% titanium dioxide. It has excellent properties such as high temperature resistance, low temperature resistance, corrosion resistance, high strength, and small specific gravity. It is widely used as an anode material for lithium batteries. In recent years, lithium-ion batteries have been widely used in mobile electronic equipment, defense industry, electric vehicles and other fields due to their remarkable advantages such as high voltage, high capacity and long cycle life. However, with the continuous popularization of lithium-ion batteries, the price of lithium (lithium carbonate) continues to rise, and the reserves of lithium resources in the earth are also small. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047H01M4/48H01M10/054
CPCY02E60/10
Inventor 洪振生张俊文
Owner FUJIAN NORMAL UNIV