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A kind of titanium nitride coated nickel titanate composite material and its preparation method and application

A composite material, nickel titanate technology, applied in the field of electrochemical energy storage, can solve the problems affecting the potential advantages of electrode materials, low electronic/ionic conductivity, etc., achieve broad industrial application prospects, improve electronic/ionic conductivity, improve Effect of rate performance and cycle stability performance

Active Publication Date: 2019-01-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the abundant reserves of transition metal mineral resources, this material system also has potential production cost advantages
However, the inherent low electronic / ionic conductivity of the transition metal titanate system hinders its potential advantages as electrode materials.
Therefore, how to improve the electronic / ionic conductivity of transition metal titanates as electrode materials for lithium-ion / sodium-ion batteries has become a key issue that limits the large-scale application of this system as anode materials for lithium-ion / sodium-ion batteries.

Method used

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  • A kind of titanium nitride coated nickel titanate composite material and its preparation method and application
  • A kind of titanium nitride coated nickel titanate composite material and its preparation method and application
  • A kind of titanium nitride coated nickel titanate composite material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] First, weigh 1.7g of tetrabutyl titanate and 1.45g of nickel nitrate hexahydrate to fully dissolve them in 200ml of ethylene glycol, then add 0.3g of citric acid to the above solution, and after stirring evenly, mix the solution Moved to a high-temperature reactor for solvothermal reaction at 180°C for 20h. The product obtained from the solvothermal reaction was repeatedly washed with water and ethanol, then suction-filtered, then placed at 80° C., and vacuum-dried for 10 hours to obtain spherical nickel titanate nanoparticles.

[0044] Then, take 0.2 g of the above-mentioned nickel titanate, add 1.5 g of tetrabutyl titanate solution, and mix the two evenly under ultrasonic conditions, then add 15 ml of deionized water dropwise to the solution, and after the two are evenly mixed, After standing, washing and drying, titanium dioxide coated nickel titanate composite material (TiO 2 @NiTiO 3 ).

[0045] Finally, take 0.2g of the above TiO 2 @NiTiO 3 Composite material...

Embodiment 2

[0053] First, weigh 1.7g of tetrabutyl titanate and 1.45g of nickel nitrate hexahydrate, and dissolve them fully in 200ml of glycerin solution, then add 0.3g of citric acid into the above solution, and after stirring evenly, mix the The solution was moved to a high-temperature reactor for solvothermal reaction at 180° C. for 20 h. The product obtained from the solvothermal reaction was repeatedly washed with water and ethanol, then suction-filtered, then placed at 80° C., and vacuum-dried for 10 hours to obtain spherical nickel titanate nanoparticles.

[0054] Then, take 0.2 g of the above-mentioned nickel titanate, add 1.5 g of tetrabutyl titanate solution, and mix the two evenly under ultrasonic conditions, then add 15 ml of deionized water dropwise to the solution, and after the two are evenly mixed, After standing, washing and drying, titanium dioxide coated nickel titanate composite material (TiO 2 @NiTiO 3 ).

[0055] Finally, take 0.2g of the above TiO 2 @NiTiO 3 C...

Embodiment 3

[0058] First, weigh 1.7g of tetrabutyl titanate and 1.45g of nickel nitrate hexahydrate, and dissolve them fully in 200ml of ethylene glycol solution, then add 0.2g of citric acid into the above solution, and after stirring evenly, mix the The solution was moved to a high-temperature reactor for solvothermal reaction at 180° C. for 20 h. The product obtained from the solvothermal reaction was repeatedly washed with water and ethanol, then suction-filtered, then placed at 80° C., and vacuum-dried for 10 hours to obtain spherical nickel titanate nanoparticles.

[0059] Then, take 0.2 g of the above-mentioned nickel titanate, add 1.5 g of tetrabutyl titanate solution, and mix the two evenly under ultrasonic conditions, then add 15 ml of deionized water dropwise to the solution, and after the two are evenly mixed, After standing, washing and drying, titanium dioxide coated nickel titanate composite material (TiO 2 @NiTiO 3 ).

[0060] Finally, take 0.2g of the above TiO 2 @NiT...

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Abstract

The invention discloses a titanium nitride-cladded nickel titanate composite material as well as a preparation method and application thereof. The composite material is a core-shell structural material TiN@NiTiO3 with titanium nitride uniformly cladded on the surfaces of spheral nickel titanate nano particles. The titanium nitride-cladded nickel titanate composite material can be applied as a negative electrode material with high charge-discharge specific capacity, favorable rate capability, long cycle performance and the like for a lithium ion battery and a sodium-ion battery, and the preparation method is simple, is low in cost, and has extensive industrial application prospect.

Description

technical field [0001] The invention relates to a titanium nitride-coated nickel titanate negative electrode composite material, a preparation method and an application thereof, and belongs to the field of electrochemical energy storage such as lithium ion batteries and sodium ion batteries. Background technique [0002] As an electrochemical energy storage device that occupies a dominant position in society, lithium-ion batteries have achieved good application prospects in portable electronic products and electric vehicles. However, due to the lack of metallic lithium resources and the high cost of lithium-ion batteries, the large-scale commercial application of lithium-ion batteries is facing severe challenges. Metal sodium and lithium are in the same main group in the periodic table of elements, and it has similar physical and chemical properties to metal lithium. At the same time, sodium also has the advantage of abundant reserves (the crustal abundance of lithium is onl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/525H01M4/62
CPCH01M4/364H01M4/525H01M4/624H01M2220/20Y02E60/10
Inventor 张治安陈晓彬史晓东李军明尹盟潘迪
Owner CENT SOUTH UNIV
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