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Aluminum ion-doped mesoporous titanium dioxide lithium battery anode material and preparation method thereof

A technology of mesoporous titanium dioxide and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor conductivity of negative electrode materials, poor conductivity of titanium dioxide negative electrodes, etc., and achieve improved lithium storage specific capacity and cycle performance, Effect of high lithium storage specific capacity and electrochemical performance, small nanoparticle size

Inactive Publication Date: 2018-06-12
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to propose a mesoporous titanium dioxide lithium battery negative electrode material doped with aluminum ions and its preparation method, the method aims at the poor conductivity of titanium dioxide negative electrode and poor conductivity as negative electrode material In order to further improve the electrochemical performance of nano-titanium dioxide materials, realize the application on lithium-ion batteries, and simplify the material preparation method, the present invention proposes the following technical solutions

Method used

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  • Aluminum ion-doped mesoporous titanium dioxide lithium battery anode material and preparation method thereof
  • Aluminum ion-doped mesoporous titanium dioxide lithium battery anode material and preparation method thereof
  • Aluminum ion-doped mesoporous titanium dioxide lithium battery anode material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0040]Add 4.5 grams of tetrabutyl titanate and 0.2 grams of anhydrous aluminum chloride into 15 milliliters of ethanol, then slowly add 150 milliliters of deionized water and 150 milliliters of 35% hydrochloric acid, and stir evenly to obtain a first reaction solution. 0.8 g of P123 was added into 15 ml of ethanol, and stirred evenly to obtain a second reaction solution. Mix the above first reaction solution with the second reaction solution and stir at room temperature to obtain a uniform light yellow sol. Then the sol was poured into a petri dish and aged for 24 hours under heating conditions to obtain a light yellow transparent xerogel. Finally, the dry gel was taken out, put into a muffle furnace and heat-treated at 400° C. in air for 4 hours at a heating rate of 10° C. / min. Finally, a mesoporous titania material doped with aluminum ions is obtained;

[0041] Carry out XRD test to the mesoporous titania material that obtains aluminum ion doping, test result is as follows...

Embodiment 2

[0047] 4.5 grams of tetrabutyl titanate and 0.1 grams of anhydrous aluminum chloride were added to 15 milliliters of ethanol, and then 100 milliliters of deionized water and 50 milliliters of 35% hydrochloric acid were added slowly, and the first reaction solution was obtained after uniform stirring. 1.6 g of P123 was added into 30 ml of ethanol, and stirred evenly to obtain a second reaction solution. Mix the above first reaction solution with the second reaction solution and stir at room temperature to obtain a uniform light yellow sol. Then the sol was poured into a petri dish and aged under heating for 18 hours to obtain a light yellow transparent xerogel. Finally, the dry gel was taken out and put into a muffle furnace for heat treatment at 500° C. in air for 4 hours at a heating rate of 10° C. / min. Finally, the aluminum ion-doped mesoporous titania material is obtained.

Embodiment 3

[0049] Add 3.7 g of tetrabutyl titanate and 0.4 g of anhydrous aluminum chloride into 15 ml of ethanol, then slowly add 150 ml of deionized water and 150 ml of 35% hydrochloric acid, and stir evenly to obtain a first reaction solution. 0.8 g of P123 was added into 15 ml of ethanol, and stirred evenly to obtain a second reaction solution. Mix the above first reaction solution with the second reaction solution and stir at room temperature to obtain a uniform light yellow sol. Then the sol was poured into a petri dish and aged under heating for 20 hours to obtain a light yellow transparent xerogel. Finally, the dry gel was taken out and put into a muffle furnace for heat treatment at 450° C. in air for 4 hours at a heating rate of 5° C. / min. Finally, the aluminum ion-doped mesoporous titania material is obtained.

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Abstract

The invention relates to an aluminum ion-doped mesoporous titanium dioxide lithium battery anode material and a preparation method thereof, and belongs to the field of electrode material preparation techniques and energy. The preparation method comprises the following steps that (1), a titanium source, aluminum salt, hydrochloric acid and absolute ethyl alcohol are mixed according to a certain mole ratio, and a first reaction solution is obtained; (2), a certain amount of surface active agent dissolves in absolute ethyl alcohol, and a second reaction solution is obtained; (3), the first reaction solution and the second reaction solution are mixed and stirred, heated and subjected to aging, and xerogel is obtained; and (4),) xerogel is placed in a muffle furnace to be subjected to heat treatment, and aluminum ion-doped mesoporous titanium dioxide is obtained. The prepared titanium dioxide material has the advantages of being good in stability, large in specific surface area, high in conductivity and excellent in electrochemical performance, can serve as the anode of lithium-ion batteries, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to an aluminum ion-doped mesoporous titanium dioxide lithium battery negative electrode material and a preparation method thereof, belonging to the technical field of inorganic nanometer material preparation. Background technique [0002] At present, lithium-ion batteries mainly use graphite as the negative electrode material. The graphite negative electrode has a high specific capacity (~370mAh / g) and a low lithium insertion potential (~0.02-0.2vs Li / Li + ), it also has high safety and stability compared to metallic lithium anodes. However, there are still some problems with the graphite negative electrode. First, a stable solid electrolyte interface (SEI) film needs to be formed on the surface of the graphite negative electrode when it is charged and discharged for the first time, which puts forward certain requirements for the composition of the electrolyte and affects its thermal stability. properties and electrochemical stab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/62H01M10/0525
CPCH01M4/485H01M4/62H01M4/624H01M10/0525Y02E60/10
Inventor 张策崔方明齐云川
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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