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A kind of wide potential window negative electrode material, its preparation method and application

A negative electrode material and potential technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems that are not conducive to large-scale industrial production, complex and changeable processes, and excessive energy consumption, and achieve considerable reversible capacity and good dispersion , The effect of stabilizing the cycle life

Inactive Publication Date: 2017-01-04
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first two methods have the disadvantages of complex and changeable process, excessive energy consumption, and high cost, which are not conducive to the realization of large-scale industrial production

Method used

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  • A kind of wide potential window negative electrode material, its preparation method and application
  • A kind of wide potential window negative electrode material, its preparation method and application
  • A kind of wide potential window negative electrode material, its preparation method and application

Examples

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Effect test

Embodiment 1

[0026] Put 0.009mol of lithium hydroxide and 0.01mol of tetrabutyl titanate in a beaker filled with 50mL of ethylene glycol, and stir for 12h under sealed conditions. will be 5.67×10 -4 mol lanthanum acetate, 0.001mol tetrabutyl titanate and 3×10 -4 mol lithium acetate was mixed in a beaker and stirred for 12 hours under sealed conditions. After stirring, mix the above two solutions, add 50mL of deionized water, stir vigorously for 1min, transfer to a 200mL closed reaction kettle and keep warm at 180°C for 36h. After cooling, filter with suction and dry at 80°C for 12h. The resulting mixture was put into a muffle furnace, calcined at 600 °C for 6 h, and cooled to room temperature to obtain Li 4 Ti 5 o 12 -0.1Li 0.3 La 0.567 TiO 3 composite material. X-ray powder diffraction analysis indicated that the obtained composite had Li 4 Ti 5 o 12 structure, with a small amount of impurity peaks and high crystallinity. From scanning electron microscope analysis, it is know...

Embodiment 2

[0028] Put 0.009mol of lithium hydroxide and 0.01mol of tetrabutyl titanate in a beaker filled with 50mL of ethylene glycol, and stir for 14h under sealed conditions. will be 2.835×10 -4 mol lanthanum nitrate, 5×10 -4 mol tetrabutyl titanate and 1.5×10 -4 mol lithium hydroxide was mixed in a beaker and stirred for 12 hours under sealed conditions. After stirring, mix the above two solutions, add 50mL of deionized water, stir vigorously for 1min, transfer to a 200mL airtight reaction kettle and keep warm at 180°C for 30h. After cooling, filter with suction and dry at 100°C for 16h. The resulting mixture was put into a muffle furnace, calcined at 500 °C for 8 h, and cooled to room temperature to obtain Li 4 Ti 5 o 12 -0.05Li 0.3 La 0.567 TiO 3 composite material. X-ray powder diffraction analysis indicated that the obtained composite had Li 4 Ti 5 o 12structure with high crystallinity. From scanning electron microscope analysis, it is known that the particle size o...

Embodiment 3

[0030] Put 0.009mol of lithium hydroxide and 0.01mol of tetrabutyl titanate in a beaker filled with 50mL of ethanol, and stir for 12h under sealed conditions. will be 5.67×10 -4 mol lanthanum acetate, 0.001mol tetrabutyl titanate and 3×10 -4 mol lithium acetate was mixed in a beaker and stirred for 12 hours under sealed conditions. After stirring, mix the above two solutions, add 50mL of deionized water, stir vigorously for 1min, transfer to a 200mL closed reaction kettle and keep warm at 170°C for 40h. After cooling, filter with suction and dry at 90°C for 18h. The resulting mixture was put into a muffle furnace, calcined at 600 °C for 10 h, and cooled to room temperature to obtain Li 4 Ti 5 o 12 -0.1Li 0.3 La 0.567 TiO 3 composite material. X-ray powder diffraction analysis indicated that the obtained composite had Li 4 Ti 5 o 12 structure, with a small amount of impurity peaks and high crystallinity. According to scanning electron microscope analysis, the parti...

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Abstract

The invention provides a broad potential window negative electrode material. The material has a chemical formula: aLi4Ti5O12-bLi3xLa(2 / 3)-xTiO3 (3%<=b:a<=15%, 0.05<=x<=0.15). The negative electrode material has the advantages of uniform particles, good dispersibility, and high crystallization degree. Materials in different morphologies and particle sizes can be obtained through adjusting the organic solvent species, reaction temperature, and reaction time.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a negative electrode material with a wide potential window, a preparation method and application thereof. Background technique [0002] With the development of various electronic devices as well as electric vehicles and hybrid vehicles, higher requirements are placed on the lithium-ion batteries that provide energy for them. Lithium-ion batteries have high capacity density and energy density, and are recognized as the most promising power batteries. At present, the anode materials of commercial lithium-ion batteries mostly use various lithium intercalation carbon / graphite materials. However, the lithium intercalation potential (0-0.26V) of carbon materials is very close to the deposition potential of metal lithium. When the battery is overcharged, metal lithium may Lithium dendrites will be precipitated on the surface of the carbon electrode, and if the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/1391
CPCH01M4/485H01M10/0525Y02E60/10
Inventor 谢颖伊廷锋付宏刚于海涛王琦宋清山
Owner HEILONGJIANG UNIV
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