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Preparation method of tantalum oxide/tantalum carbide composite material as well as product and application thereof

A composite material, tantalum carbide technology, used in electrochemical generators, structural parts, electrical components, etc.

Active Publication Date: 2021-05-04
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tantalum carbide is an intermetallic filling compound formed by interstitial fusion of carbon atoms into the lattice of transition metals. It has the conductivity of metals, can enhance reaction kinetics, and improve electrochemical performance. There are no relevant reports on tantalum carbide and its composite materials in the field of electrochemical energy storage. Therefore, it is necessary to explore and study the preparation methods of tantalum carbide and its composite materials, and their application as electrode materials for electrochemical energy storage lithium-ion batteries.

Method used

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  • Preparation method of tantalum oxide/tantalum carbide composite material as well as product and application thereof
  • Preparation method of tantalum oxide/tantalum carbide composite material as well as product and application thereof
  • Preparation method of tantalum oxide/tantalum carbide composite material as well as product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] At room temperature, acetylacetone and ethanol were sequentially added to the reactor at a volume ratio of 1:4, and the total volume of the two was 60% of the reactor volume; at a stirring rate of 900 rpm, TaCl was sequentially added at a mass ratio of 1:0.2 5 With phenolic resin (H + ), TaCl 5 The mass ratio with ethanol is 1:40, and the mixed solution is obtained by stirring evenly, and the temperature of the mixed solution is raised to 60° C., kept at reflux for 3 hours, and the complex is obtained;

[0034] The above complex was placed in a 50mL reactor, and solvothermally reacted at 200°C for 3h, cooled to room temperature, centrifuged, washed, and dried at 80°C to obtain a precursor powder containing tantalum source and carbon source;

[0035] The precursor powder is fully ground and placed in a tube furnace, under the protection of argon, the temperature is raised to 1200°C at 20°C / min for high-temperature heat treatment, kept for 1h, and cooled with the furnace...

Embodiment 2

[0038] At room temperature, acetylacetone and n-butanol were sequentially added to the reactor at a volume ratio of 1:4, and the total volume of the two was 60% of the reactor volume; at a stirring rate of 800 rpm, sequentially added acetylacetone and n-butanol at a mass ratio of 1:0.1 TaCl 5 With phenolic resin (H + ), TaCl 5 The mass ratio to n-butanol is 1:10, and the mixed solution is obtained by stirring evenly, and the mixed solution is heated to 60° C., kept at reflux for 1 hour, and the complex is obtained;

[0039] The above complex was placed in a 50mL reactor, and subjected to solvothermal reaction at 160°C for 9h, cooled to room temperature, centrifuged, washed, and dried at 80°C to obtain a precursor powder containing tantalum source and carbon source;

[0040] The precursor powder is fully ground and placed in a tube furnace. Under the protection of argon, the temperature is raised to 1100°C at 10°C / min for high-temperature heat treatment, kept for 1h, and cool...

Embodiment 3

[0042] At room temperature, acetylacetone and isopropanol were sequentially added to the reactor at a volume ratio of 1:4, and the total volume of the two was 60% of the reactor volume; at a stirring rate of 500 rpm, sequentially added acetylacetone and isopropanol at a mass ratio of 1:0.15 TaCl 5 With phenolic resin (H + ), TaCl 5 The mass ratio to isopropanol is 1:10, and the mixed solution is obtained by stirring evenly, and the mixed solution is heated to 60° C., kept at reflux for 2 hours, and the complex is obtained;

[0043] The above complex was placed in a 50mL reactor, and subjected to solvothermal reaction at 180°C for 6h, cooled to room temperature, centrifuged, washed, and dried at 80°C to obtain a precursor powder containing tantalum source and carbon source;

[0044] The precursor powder is fully ground and placed in a tube furnace. Under the protection of argon, the temperature is raised to 1400°C at 20°C / min for high-temperature heat treatment, kept for 0.5h...

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Abstract

The invention discloses a preparation method of a tantalum oxide / tantalum carbide composite material as well as a product and application of the tantalum oxide / tantalum carbide composite material. The preparation method comprises the following steps of: uniformly mixing acetylacetone, an organic solvent, a tantalum source and phenolic resin, preserving heat and refluxing to obtain a complex; performing solvothermal reaction on the complex to obtain precursor powder containing the tantalum source and a carbon source; and fully grinding the precursor powder, and carrying out heat treatment under the protection of inert gas to obtain the tantalum oxide / tantalum carbide composite material. The prepared tantalum oxide / tantalum carbide composite material can be used as a lithium ion battery electrode material. The tantalum oxide / tantalum carbide composite material has the advantages of simplicity in operation, few steps, short period and low energy consumption, solves the problem of agglomeration in a high-temperature process, is beneficial to shortening the diffusion distance of ions, and has obvious advantages as a lithium ion battery electrode material due to good conductivity and chemical stability of tantalum carbide.

Description

technical field [0001] The invention relates to the technical field of synthesis and application of electrode materials, in particular to a preparation method of a tantalum oxide / tantalum carbide composite material and its product and application. Background technique [0002] Lithium-ion batteries are widely used in portable electronic devices and electric vehicles as a clean energy storage device. However, the current commercial graphite anode materials cannot meet the needs of aerospace and other fields. It is necessary to develop new anode materials with high energy density, high power density, and long-term cycle stability, including transition metal oxides, carbides, nitrides, and sulfides. Among them, oxides and carbides of transition metal tantalum have excellent chemical stability and high theoretical capacity, and are suitable as electrode materials. Tantalum carbide is an intermetallic filling compound formed by interstitial fusion of carbon atoms into the lattic...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M10/0525
CPCH01M4/366H01M4/483H01M4/583H01M10/0525Y02E60/10
Inventor 高银红张琴李艳军李轩科徐文莉南旭孙兵黄强阳尧李琪琪
Owner WUHAN UNIV OF SCI & TECH
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