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Nitrogen-doped carbon-coated titanium niobate composite electrode material and preparation method thereof

A nitrogen-doped carbon and composite electrode technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as low conductivity and poor rate performance, achieve low production costs, enhance conductivity, and facilitate large-scale industrial production Effect

Inactive Publication Date: 2016-04-27
NANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, what this application intends to solve is the problem of low conductivity and poor rate performance of electrode materials in the prior art, and a nitrogen-doped carbon-coated titanium niobate composite electrode material and its preparation method are provided.

Method used

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  • Nitrogen-doped carbon-coated titanium niobate composite electrode material and preparation method thereof
  • Nitrogen-doped carbon-coated titanium niobate composite electrode material and preparation method thereof
  • Nitrogen-doped carbon-coated titanium niobate composite electrode material and preparation method thereof

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Embodiment 1

[0031] a. Weigh anatase titanium dioxide and niobium pentoxide according to the atomic ratio Ti:Nb=1:6.2, and then weigh a certain amount of cyanamide, wherein the mass of cyanamide is the total mass of titanium oxide and niobium oxide 10%, these three kinds of materials are joined in the ball mill tank, with absolute ethanol as the medium, ball milled for 24 hours at a speed of 300 rev / min on the ball mill;

[0032] b. drying the slurry obtained in step a at 60° C. to obtain a powder mixture;

[0033] c. Calcining the powder mixture obtained in the above step b at 1350° C. for 42 hours under nitrogen protection, and cooling to obtain a nitrogen-doped carbon-coated titanium niobate composite electrode material.

[0034] The experimental results of the nitrogen-doped carbon-coated titanium niobate composite electrode material prepared in Example 1 are as follows Figure 1-Figure 4 shown.

[0035] figure 1 For the XRD figure of the titanium niobate composite electrode materia...

Embodiment 2

[0040] a. Take by weighing P25 and niobium dioxide by atomic ratio Ti:Nb=1:5.8, and then weigh a certain amount of cyanamide, wherein the quality of cyanamide is 15% of the total mass of titanium oxide and niobium oxide. Three kinds of materials are added in the ball mill tank, with acetone as the medium, ball milling with a speed of 610 rpm on the ball mill for 31 hours;

[0041] b. Dry the slurry obtained in step a at 112°C to obtain a powder mixture;

[0042] c. Calcining the powder mixture obtained in the above step b under the protection of helium at 1000° C. for 41 hours, and cooling to obtain a nitrogen-doped carbon-coated titanium niobate composite electrode material.

Embodiment 3

[0044] a. Weigh titanium monoxide and niobium trioxide according to the atomic ratio Ti:Nb=1:5.7, and then weigh a certain amount of melamine, wherein the quality of melamine is 20% of the total mass of titanium oxide and niobium oxide. These three kinds of materials are added in the ball mill jar, with absolute ethanol as the medium, on the ball mill with 230 rev / min speed ball mill for 12 hours;

[0045] b. drying the slurry obtained in step a at 74°C to obtain a powder mixture;

[0046]c. Calcining the powder mixture obtained in the above step b at 960° C. for 58 hours under the protection of helium, and cooling to obtain a nitrogen-doped carbon-coated titanium niobate composite electrode material.

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Abstract

The invention belongs to the technical field of materials for lithium ion batteries and discloses a nitrogen-doped carbon-coated titanium niobate composite electrode material and a preparation method thereof. The nitrogen-doped carbon-coated titanium niobate composite electrode material is prepared by proportionally performing ball-mill mixing on titanium oxide, niobium oxide and organic amine, drying and calcining under inert gas protection. The nitrogen-doped carbon-coated titanium niobate composite electrode material has an excellent cycle performance. Furthermore, the nitrogen-doped carbon-coated titanium niobate composite electrode material and the preparation method thereof have the advantages of technical simplicity, convenience in operation, low cost, low material cost, low production cost and easiness for large-scale industrial production.

Description

technical field [0001] The application belongs to the field of negative electrode materials for lithium ion batteries, and in particular relates to a nitrogen-doped carbon-coated titanium niobate composite electrode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries are widely used in various small electronic products due to their high operating voltage, high energy density, long service life and environmental friendliness. In recent years, electric vehicles and hybrid electric vehicles have been favored by people all over the world. As an ideal power source for electric vehicles, the development of power lithium-ion batteries is imminent. The current commercial lithium-ion battery anode materials are mainly various graphite-like carbon materials, but the low electrode potential easily leads to the formation of lithium dendrites, which leads to safety issues. In addition, carbon materials have poor capacity and cycle performance a...

Claims

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Application Information

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IPC IPC(8): H01M4/583H01M4/48H01M4/1393H01M4/1391H01M10/0525
CPCH01M4/1391H01M4/1393H01M4/366H01M4/483H01M4/583H01M10/0525Y02E60/10
Inventor 刘光印郭佳莉赵强孙瑞雪柳文敏包晓玉张瑞雪谢海泉鲍克燕季晓广
Owner NANYANG NORMAL UNIV
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