Preparation method for carbon-coated nano-titanium dioxide electrode material

A titanium dioxide and nano-electrode technology, which is applied in the preparation/purification of titanium dioxide and carbon, titanium oxide/hydroxide, etc., can solve the problems of cumbersome preparation methods and processes, high manufacturing costs, and achieve low prices, moderate conditions and abundant raw materials. Effect

Inactive Publication Date: 2014-08-06
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned titanium dioxide with different shapes and structures all show good electrochemical properties, however, the above-mentioned preparation methods and processes are relatively cumbersome and the manufacturing cost is relatively high

Method used

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  • Preparation method for carbon-coated nano-titanium dioxide electrode material
  • Preparation method for carbon-coated nano-titanium dioxide electrode material
  • Preparation method for carbon-coated nano-titanium dioxide electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh titanium sulfate and glucose according to the mass ratio of titanium sulfate and glucose as 1:0.2, respectively dissolve them in deionized water, stir and mix evenly, add the glucose aqueous solution into the titanium sulfate aqueous solution, move it into the hydrothermal reaction kettle, and heat it at 140°C Keep warm for 6 hours. After natural cooling to room temperature, the product was repeatedly washed with deionized water and alcohol, filtered and dried. The dried product was moved into a heating furnace, kept carbonized at 600° C. for 4 hours under an argon protective atmosphere, and cooled naturally to room temperature.

[0021] After drying the product obtained by heating the product at 140°C for 6 hours, it was calcined at 600°C in air for 4 hours, so that the coating on the surface of titanium dioxide was completely oxidized and volatilized. It can be known by measuring the mass loss before and after calcination that the coating on the surface of titan...

Embodiment 2

[0023] Weigh titanium sulfate and glucose according to the mass ratio of titanium sulfate and glucose as 1:0.5, respectively dissolve them in deionized water, stir and mix evenly, add the glucose aqueous solution into the titanium sulfate aqueous solution, move it into a hydrothermal reaction kettle, and heat Keep warm for 5 hours. After natural cooling to room temperature, the product was repeatedly washed with deionized water and alcohol, filtered and dried. The dried product was moved into a heating furnace, kept carbonized at 650° C. for 4 hours under an argon protective atmosphere, and cooled naturally to room temperature.

[0024] After drying the product obtained by heating water at 160°C for 5 hours, it was calcined in air at 600°C for 4 hours, so that the coating on the surface of titanium dioxide was completely oxidized and volatilized. It can be known by measuring the mass loss before and after calcination that the coating on the surface of titanium dioxide The pro...

Embodiment 3

[0026] Weigh titanium sulfate and glucose according to the mass ratio of titanium sulfate and glucose as 1:1.2, respectively dissolve them in deionized water, stir and mix evenly, add the glucose aqueous solution into the titanium sulfate aqueous solution, move it into the hydrothermal reaction kettle, and heat Keep warm for 4 hours. After natural cooling to room temperature, the product was repeatedly washed with deionized water and alcohol, filtered and dried. The dried product was moved into a heating furnace, kept carbonized at 700° C. for 4 hours under an argon protective atmosphere, and cooled naturally to room temperature.

[0027] After drying the product obtained by heating water at 180°C for 4 hours, it was calcined in the air at 600°C for 4 hours, so that the coating on the surface of titanium dioxide was completely oxidized and volatilized. By measuring the mass loss before and after calcination, it can be known that the coating on the surface of titanium dioxide ...

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Abstract

The invention relates to a preparation method for carbon-coated nano-titanium dioxide electrode material for a lithium-ion battery. The preparation method comprises the following steps: using titanium sulfate as a titanium source, and glucose or sucrose as a carbon source, weighing the titanium sulfate and the carbon source in a certain mass ratio, and respectively dissolving the titanium sulfate and the carbon source in deionized water; adding the aqueous solution of the carbon source into the aqueous solution of the titanium sulfate, stirring uniformly, and transferring to a hydrothermal reaction kettle; keeping temperature for a certain time, cooling, washing a resultant, filtering, and drying; under the protection of an argon atmosphere, calcinating at high temperature to obtain the carbon-coated nano-titanium dioxide electrode material. According to the preparation method for the carbon-coated nano-titanium dioxide electrode material, selected raw materials are low in cost; the prepared carbon-coated nano-titanium dioxide electrode material has excellent charge-discharge cycle performance, so that requirements on the electrode material of the lithium-ion battery can be met; the preparation method is simple in process and easy in industrial production.

Description

technical field [0001] The invention relates to a method for preparing a carbon-coated titanium dioxide nanometer electrode material by using a hydrothermal method, and belongs to the field of electrochemical energy materials. Background technique [0002] Titanium dioxide TiO 2 As an anode material for lithium-ion batteries, it has the excellent characteristics of high theoretical specific capacity, good cycle performance and low price, and has very broad application prospects. However, titanium dioxide is a semiconductor with low electronic conductivity, so its high theoretical specific capacity is difficult to be fully utilized, thus limiting the application of titanium dioxide. [0003] To solve this problem, the commonly used method is to prepare titanium dioxide nanotubes (Min Gyu Choi, et al, Journal of Power Sources, 195 (2010) 8289-8296), mesoporous titanium dioxide (Hun-Gi Jung, et al, Electrochemistry Communications, 11 (2009)756-759), nanowires (Zunxian Yang, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01B31/02H01M4/48B82Y30/00B82Y40/00C01B32/05
CPCY02E60/10
Inventor 陈玉喜龚立君刘洪波
Owner HUNAN UNIV
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