Preparation method of high-performance Ti2Nb10O29/C composite electrode material

A composite electrode, high-performance technology, used in electrode manufacturing, battery electrodes, circuits, etc., can solve problems such as poor material rate performance, improve electronic conductivity, facilitate large-scale industrial production, and low production costs.

Inactive Publication Date: 2016-03-23
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the Ti 2 Nb 10 o 29 The problem of poor material rate performance provides a high-performance Ti 2 Nb 10 o 29 / C composite electrode material preparation method, the method is a simple process, easy to operate, easy to large-scale production of in-situ carbon-coated Ti 2 Nb 10 o 29 Material preparation method

Method used

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  • Preparation method of high-performance Ti2Nb10O29/C composite electrode material
  • Preparation method of high-performance Ti2Nb10O29/C composite electrode material
  • Preparation method of high-performance Ti2Nb10O29/C composite electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (a) Ball milling and mixing: Weigh anatase titanium dioxide and niobium dioxide and a certain amount of glucose (10% of the total mass of titanium dioxide and niobium dioxide) into the agate tank according to the stoichiometric ratio, and use ethanol as the medium. Ball milling on planetary ball mill at 280 rpm for 1-28 hours;

[0028] (b) Drying: The slurry obtained in step (a) is vacuum dried at 62-110°C to obtain Ti 2 Nb 10 O 29 / C composite precursor;

[0029] (c) High temperature calcination: the precursor obtained in (b) above is calcined at 760-1340°C for 0.6-45 hours under the protection of argon, and Ti is obtained after cooling 2 Nb 10 O 29 / C Composite electrode material.

[0030] Ti prepared in Example 1 2 Nb 10 O 29 The experimental results of / C composite materials are as follows Figure 1-Figure 4 Shown.

Embodiment 2

[0032] (a) Ball milling and mixing: Weigh rutile titanium dioxide and niobium dioxide and a certain amount of citric acid (40% of the total mass of titanium dioxide and niobium dioxide) according to the stoichiometric ratio and add them to the agate tank. Use ethanol as the medium. Ball mill at 510 rpm for 2-24 hours;

[0033] (b) Drying: the slurry obtained in step (a) is vacuum dried at 70-117°C to obtain Ti 2 Nb 10 O 29 / C composite precursor;

[0034] (c) High temperature calcination: The precursor obtained in (b) above is calcined at 800-1350°C for 1-30 hours under the protection of argon, and Ti is obtained after cooling 2 Nb 10 O 29 / C Composite electrode material.

Embodiment 3

[0036] (a) Ball milling and mixing: Weigh titanium dioxide (P25), niobium pentoxide and a certain amount of sucrose (60% of the total mass of titanium dioxide and niobium pentoxide) according to the stoichiometric ratio and add them to the agate tank, using ethanol as the medium. Ball mill at 350 rpm for 4-25 hours on planetary ball mill;

[0037] (b) Drying: The slurry obtained in step (a) is vacuum dried at 76-106°C to obtain Ti 2 Nb 10 O 29 / C composite precursor;

[0038] (c) High temperature calcination: The precursor obtained in (b) above is calcined at 840-1280°C for 2-37 hours under the protection of nitrogen, and Ti is obtained after cooling. 2 Nb 10 O 29 / C Composite electrode material.

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Abstract

The present invention discloses a preparation method of a high-performance Ti2Nb10O29 / C composite electrode material, and belongs to the technical field of lithium ion battery materials. The preparation method comprises the steps of: carrying out ball mill mixing on titanium dioxide, niobium oxide and a carbon source according to a certain proportion, then putting the dried mixture into a muffle furnace, and calcining the mixture under the protection of an inert gas to obtain the Ti2Nb10O29 / C composite material. According to the preparation method disclosed by the present invention, the electric conductivity of Ti2Nb10O29 / C is improved by using carbon coating; meanwhile, a coated carbon layer has a certain inhibitory effect on a particle size increasing phenomenon of a sample in the sintering process; and the Ti2Nb10O29 / C, serving as a lithium ion battery cathode material, shows excellent electrochemical performance. Moreover, the preparation method disclosed by the present invention is simple in preparation process, convenient in operation and low in production cost, and is easy to realize large-scale industrial production.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion battery materials, and relates to a high-performance Ti 2 Nb 10 O 29 / C composite electrode material preparation method. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high energy density, and environmental friendliness, and are widely used in various portable electronic products. At present, governments of all countries are vigorously supporting the development of the electric vehicle industry, and power batteries are an important indicator that determines the development of electric vehicles. Currently, most commercial lithium-ion batteries use graphite-like carbon materials as negative electrodes, but they have the disadvantages of low charge and discharge rate performance, poor safety, and short cycle life, which cannot meet the requirements of power batteries for electric vehicles. [0003] Since 2012, the research group of Academician Chen Liqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/04H01M4/62H01M10/0525
CPCH01M4/04H01M4/362H01M4/48H01M4/625H01M10/0525Y02E60/10
Inventor 刘光印郭佳莉孙瑞雪冯玉全毛武涛季晓广张瑞雪陈希涵鲍克燕谢海泉
Owner NANYANG NORMAL UNIV
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