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Preparation method of nano anatase-phase titanium dioxide and application in lithium battery

A technology of titanium dioxide and nano-anatase, applied in the field of lithium-ion batteries, can solve the problems of low lithium storage capacity, performance degradation, volume expansion, etc., and achieve the effect of increasing lithium storage capacity and improving rate performance

Inactive Publication Date: 2012-08-22
HYB BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both tin and silicon-based materials have a common problem: significant volume expansion will occur during the lithium extraction / intercalation process, and after a few cycles, the electrode will be pulverized and peeled off due to the volume change, and the performance will drop sharply.
However TiO 2 Lithium storage capacity is low (176mAh g -1 , Li 0.5 TiO 2 ), which cannot meet the capacity requirements of current new energy devices for energy storage and power supply

Method used

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  • Preparation method of nano anatase-phase titanium dioxide and application in lithium battery
  • Preparation method of nano anatase-phase titanium dioxide and application in lithium battery
  • Preparation method of nano anatase-phase titanium dioxide and application in lithium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) The preparation composition is 0.05M ammonium fluorotitanate ((NH 4 ) 2 [TiF 6 ]) and 0.15M boric acid LPD deposition solution, adjust the pH of the deposition solution to 2.9 with hydrochloric acid;

[0033]2) Keep the LPD deposition solution obtained in step 1) in a sealed polypropylene container at 50°C for 2 hours;

[0034] 3) The system obtained in step 2) is filtered, washed, and dried at room temperature to obtain a white powder;

[0035] 4) The white powder in step 3) was sintered in a muffle furnace at 450° C. and kept for 3 hours, and then cooled to room temperature with the furnace to obtain nano anatase phase titanium dioxide.

Embodiment 2

[0037] 1) The preparation composition is 0.05M ammonium fluorotitanate ((NH 4 ) 2 [TiF 6 ]) and 0.15M boric acid LPD deposition solution, adjust the pH of the deposition solution to 2.9 with hydrochloric acid;

[0038] 2) Keep the LPD deposition solution obtained in step 1) in a sealed polypropylene container at 50°C for 4 hours;

[0039] 3) The system obtained in step 2) is filtered, washed, and dried at room temperature to obtain a white powder;

[0040] 4) The white powder in step 3) was sintered in a muffle furnace at 450° C. and kept for 3 hours, and then cooled to room temperature with the furnace to obtain nano anatase phase titanium dioxide.

Embodiment 3

[0042] 1) The preparation composition is 0.05M ammonium fluorotitanate ((NH 4 ) 2 [TiF 6 ]) and 0.15M boric acid LPD deposition solution, adjust the pH of the deposition solution to 2.9 with hydrochloric acid;

[0043] 2) Keep the LPD deposition solution obtained in step 1) in a sealed polypropylene container at 50°C for 6 hours;

[0044] 3) The system obtained in step 2) is filtered, washed, and dried at room temperature to obtain a white powder;

[0045] 4) The white powder in step 3) was sintered in a muffle furnace at 450° C. and kept for 3 hours, and then cooled to room temperature with the furnace to obtain nano anatase phase titanium dioxide.

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Abstract

The invention discloses a preparation method of a nano anatase-phase titanium dioxide, which adopts a liquid-phase depositing method and comprises the following steps of: 1) preparing an LPD (liquid phase depositing) depositing solution composed of 0.05 M of titanium salt and 0.1-0.15 M of boric acid; adjusting pH of the depositing solution to 2.8-3.0 by hydrochloric acid; 2) sealing the LED depositing solution obtained by the step 1) and performing thermal insulation for 2-8 hours and controlling the temperature in a range of 45-55 DEG C; 3) filtering and washing the system obtained by the step 2) and drying at a room temperature; and 4) sintering the product dried by the step 3), wherein the sintering temperature is 450 DEG C; and performing thermal insulation for 2-3 hours and cooling to the room temperature. Compared with the titanium dioxide without a nano cone characteristic, the lithium storage capacity of the titanium dioxide is improved by a nano cone structure containing a {100} crystal face, and the multiplying power performance is improved, and thus the preparation method provided by the invention lays a good foundation for constructing a lithium battery cathode composite material with high performance and the practicability of the lithium battery cathode composite material.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to the preparation of nano anatase phase titanium dioxide with a unique structure and the research on its formation mechanism, which is applied to negative electrode materials of lithium-ion batteries. Background technique [0002] The needs of energy conservation and environmental protection have prompted human beings to develop renewable energy and green energy technologies. Lithium-ion batteries are one of the best choices for new green energy storage devices, but their wide application in renewable energy power generation and energy storage and electric vehicles still needs breakthroughs in technical and economic indicators. The selection of electrode materials for lithium-ion batteries determines the level of theoretical energy and power density of the battery. Reasonable design of the structure and composition of electrode materials will maximize the lithium storage perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48B82Y40/00H01M4/131H01M10/0525
CPCY02E60/10
Inventor 雷建飞王媛李本臻李伟善冯岸柏冯洪亮井明召
Owner HYB BATTERY
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