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A kind of nickel titanate negative electrode material of sodium ion battery and preparation method thereof

A sodium ion battery and negative electrode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of cycle performance and rate performance without great advantages, crystal impurity, and no fixed shape, etc., to improve cycle performance Stability and rate performance, increased wetted contact area, low cost effect

Active Publication Date: 2019-09-24
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
[0005] Nickel titanate material is a potential negative electrode material for sodium-ion battery / lithium-ion battery, but the existing nickel titanate material has no fixed morphology, and the crystal is not pure. It has no great advantages in cycle performance and rate performance when used as an electrode material.

Method used

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  • A kind of nickel titanate negative electrode material of sodium ion battery and preparation method thereof
  • A kind of nickel titanate negative electrode material of sodium ion battery and preparation method thereof
  • A kind of nickel titanate negative electrode material of sodium ion battery and preparation method thereof

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Effect test

Embodiment 1

[0045]First weigh 1.7g tetrabutyl titanate and 1.45g nickel nitrate hexahydrate, fully dissolve them in a mixed solution composed of 200ml N'N-dimethylformamide and 200ml methanol, then weigh 9.96g 1,4 - Terephthalic acid was slowly added to the above solution under magnetic stirring conditions, and after stirring evenly, the resulting mixed solution was transferred to a polytetrafluoroethylene reactor, and a solvothermal reaction was carried out at 160 ° C. After 18 hours of reaction, the obtained precipitate was The material was repeatedly washed with methanol and N'N-dimethylformamide, and dried to obtain the Ti-Ni bimetallic MOFs precursor.

[0046] Weigh an appropriate amount of Ti-Ni bimetallic MOFs precursor, put it into a corundum porcelain boat, and place it in a vacuum tube furnace. Oxygen was introduced to raise the temperature of the tube furnace to 150°C, and kept at this temperature for 1.5h; then, the tube furnace was continued to be heated to 700°C and fully ox...

Embodiment 2

[0053] First weigh 1.7g of tetrabutyl titanate and 1.45g of nickel nitrate hexahydrate and dissolve them in 400mL of N'N-dimethylformamide, then weigh 6.64g of 1,4-terephthalic acid in a magnetic Slowly added to the above solution under stirring conditions, after stirring evenly, the resulting mixed solution was transferred to a polytetrafluoroethylene reactor, and a solvothermal reaction was carried out at 160 ° C. After 14 hours of reaction, the obtained precipitate was subjected to methanol and N'N - Dimethylformamide is repeatedly washed and dried to obtain the Ti-Ni bimetallic MOFs precursor.

[0054] Weigh an appropriate amount of Ti-Ni bimetallic MOFs precursor, put it into a corundum porcelain boat, and place it in a vacuum tube furnace. Oxygen was introduced to raise the temperature of the tube furnace to 180°C, and kept at this temperature for 1.5h; then, the tube furnace was continued to be heated to 600°C and fully oxidized for 6h. Finally, the obtained oxidation ...

Embodiment 3

[0058] First, weigh 1.7g of tetrabutyl titanate and 1.45g of nickel nitrate hexahydrate to fully dissolve them in 400mL of methanol solution, then weigh 9.96g of 1,4-terephthalic acid and slowly add them to the above solution, after stirring evenly, the resulting mixed solution was transferred to a polytetrafluoroethylene reactor, and a solvothermal reaction was carried out at 180 ° C. After 18 hours of reaction, the obtained precipitate was repeatedly subjected to methanol and N'N-dimethylformamide. After washing and drying, the precursor of Ti-Ni bimetallic MOFs can be obtained.

[0059] Weigh an appropriate amount of Ti-Ni bimetallic MOFs precursor, put it into a corundum porcelain boat, and place it in a vacuum tube furnace. The temperature of the tube furnace was raised to 180°C by feeding oxygen, and kept at this temperature for 1h; then, the temperature of the tube furnace was continued to be raised to 700°C and fully oxidized for 4h. Finally, the obtained oxidation pr...

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Abstract

The invention discloses a sodium-ion battery nickel titanate cathode material and a preparation method thereof. The nickel titanate material has a loose and porous structure and a disc-shaped micro-structure, and has low potential, high specificity and excellent circulation performance when used as a sodium-ion battery cathode material. The preparation method of the sodium-ion battery nickel titanate cathode material is simple, cost is low, and wide industrial application prospects are achieved.

Description

technical field [0001] The invention relates to a novel sodium ion battery negative electrode material and a preparation method thereof, in particular to a sodium ion battery nickel titanate negative electrode material and a preparation method thereof, belonging to the field of sodium ion batteries. Background technique [0002] Since the advent of lithium-ion batteries in the 1980s, as the third generation of rechargeable batteries, they have attracted much attention due to their advantages such as high specific energy, no memory effect, long service life and low environmental pollution, and are widely used in electric vehicles and notebook computers. , smartphones and other mobile electronic devices. However, due to the relatively small content of lithium in the earth's crust, it is necessary to develop a new type of secondary battery system. [0003] Sodium-ion batteries are considered to be ideal candidates for next-generation energy storage and conversion systems. Sod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52H01M4/1391H01M10/36
CPCH01M4/1391H01M4/52H01M4/523H01M10/36Y02E60/10
Inventor 张治安宋俊肖史晓东潘迪李天伟于航尹盟李天凡解豪
Owner CENT SOUTH UNIV
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