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Power lithium ion battery titanium dioxide microsphere cathode material and preparation method thereof

A lithium-ion battery and titanium dioxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of weak conductivity, restricting the application of electric vehicles, and low rate capacity, and achieve high charge and discharge capacity, which is conducive to migration and electron transfer. Effects of transfer, good rate performance and cycle performance

Active Publication Date: 2012-11-14
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, graphite is widely used as a commercial anode material for lithium-ion batteries, but there are also some safety and cycle life issues that restrict its application in electric vehicles
As an anode material for lithium-ion batteries, titanium dioxide has high safety and good cycle life, but its weak conductivity, low rate capacity and other shortcomings also affect its application.

Method used

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  • Power lithium ion battery titanium dioxide microsphere cathode material and preparation method thereof
  • Power lithium ion battery titanium dioxide microsphere cathode material and preparation method thereof
  • Power lithium ion battery titanium dioxide microsphere cathode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) The resorcinol of 1.32 mass parts, the formaldehyde (35wt%) of 2.05 mass parts, the water of 1.92 mass parts, the sodium carbonate of 0.006 mass parts are mixed, stirred at 70 ℃ of temperature for 2 hours, then at room temperature After standing for 24 hours, a dark orange resin gel was obtained.

[0026] (2) Grinding the above-mentioned resin gel, washing with water to remove excess sodium carbonate in the resin gel, repeating the process 3 times; then immersing the resin gel in tri-tert-butanol and stirring with magnetic force for 30 minutes, then filtering, this The steps were repeated three times; then, drying was performed at 100° C. for 8 hours to obtain resin gel particles.

[0027] (3) Dissolve 3.5 parts by mass of n-butyl titanate in 6.5 parts by mass of tri-tert-butanol, then add the above resin gel particles and stir for 35 hours, let stand for 48 hours, and dry at 100°C for 8 hours , to obtain a gel mixture.

[0028] (4) The above-mentioned gel mixture...

Embodiment 2

[0030] (1) The resorcinol of 1.32 mass parts, the formaldehyde (35wt%) of 2.05 mass parts, the water of 1.92 mass parts, the sodium carbonate of 0.006 mass parts are mixed, stirred at 70 ℃ of temperature for 2 hours, then placed at room temperature After 24 hours, a dark orange resinous gel was obtained.

[0031] (2) Grinding the above-mentioned resin gel, washing with water to remove excess sodium carbonate in the resin gel, repeating the process 3 times; then immersing the resin gel in tri-tert-butanol and stirring with magnetic force for 15 minutes, and then filtering, this The steps were repeated three times; then, drying was performed at 100° C. for 12 hours to obtain resin gel particles.

[0032] (3) Dissolve 3.5 parts by mass of n-butyl titanate in 6.5 parts by mass of tri-tert-butanol, then add the above-mentioned resin gel particles and stir for 35 hours, let stand for 48 hours, and then dry at 100°C for 8 hours, a gel mixture was obtained.

[0033] (4) The above-me...

Embodiment 3

[0035] (1) The resorcinol of 3.96 mass parts, the formaldehyde (35wt%) of 2.05 mass parts, the water of 1.92 mass parts, the sodium carbonate of 0.018 mass parts are mixed, stirred at 60 ℃ of temperature for 4 hours, then placed at room temperature After 36 hours, a deep orange resinous gel was obtained.

[0036] (2) Grinding the above-mentioned resin gel, washing with water to remove excessive sodium carbonate in the resin gel, repeating this process 4 times; then immersing the resin gel in tri-tert-butanol and stirring with magnetic force for 15 minutes, and then filtering. Repeat the steps 5 times; then dry at 120° C. for 8 hours to obtain resin gel particles.

[0037] (3) Dissolve 7 parts by mass of n-butyl titanate in 13 parts by mass of tri-tert-butanol, then add the above-mentioned resin gel particles and stir for 70 hours, let stand for 96 hours, and then dry at 120°C for 12 hours, a gel mixture was obtained.

[0038] (4) Heat the above-mentioned gel mixture at 600°C...

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Abstract

The invention discloses a power lithium ion battery titanium dioxide microsphere cathode material and a preparation method thereof. In the method, a porous resin is used as a template to prepare a titanium dioxide microsphere by a segmented calcination method. The titanium dioxide microsphere prepared by the invention has higher charge-discharge capacity, multiplying power and better circular performance.

Description

technical field [0001] The invention relates to the field of power lithium ion batteries, in particular to a titanium dioxide microsphere negative electrode material for a power lithium ion battery and a preparation method thereof. Background technique [0002] With the wide application as a power source for portable devices, lithium-ion batteries are considered to be the most promising power source for electric vehicles and energy storage devices. At present, graphite is widely used as a commercial anode material for lithium-ion batteries, but there are also some safety and cycle life issues that restrict its application in electric vehicles. As an anode material for lithium-ion batteries, titanium dioxide has high safety and good cycle life, but its weak conductivity, low rate capacity and other shortcomings also affect its application. Therefore, how to improve the performance of titanium dioxide, enhance its conductivity and rate capacity, is the hot spot of current res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1391H01M4/131H01M4/48
CPCY02E60/122Y02E60/10
Inventor 易金李伟善郝连升陈朗王媛
Owner SOUTH CHINA NORMAL UNIVERSITY
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