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A kind of preparation method of lithium ion battery composite negative electrode material

A lithium-ion battery and negative electrode material technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of fast capacity decay, poor rate performance, low electronic conductance and ion conductance, and achieve high reproducibility and improved Effects of energy density, power density, and consumption reduction

Active Publication Date: 2019-08-23
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the biggest disadvantage is that its electronic conductance and ionic conductance are low, so the capacity fades quickly and the rate performance is poor when charging and discharging at high current.

Method used

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  • A kind of preparation method of lithium ion battery composite negative electrode material
  • A kind of preparation method of lithium ion battery composite negative electrode material
  • A kind of preparation method of lithium ion battery composite negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.06mol of anatase titanium dioxide (TiO 2 ), 0.02mol sodium acetate (CH 3 COONa), 0.01mol barium carbonate (BaCO 3 ) into an agate jar and add an appropriate amount of absolute ethanol for ball milling for 10 hours, put the agate jar in an oven to dry at 60°C, cool to room temperature, then put it in a muffle furnace for pre-burning at 400°C for 4 hours, cool to room temperature, and then dry at 1000°C Calcined at ℃ for 10h, cooled to room temperature, ball milled for 24h, and sieved to obtain the negative electrode material BaNa 2 Ti 6 o 14 Precursor. 0.01mol BaNa 2 Ti 6 o 14 , 0.00033mol lithium hydroxide (LiOH), 0.00056mol lanthanum nitrate (La(NO 3 ) 3 ) and 0.001mol tetrabutyl titanate were dissolved in ethylene glycol, stirred for 3.5h, then placed in a closed reaction kettle and kept at 180°C for 12h, cooled, and dried at 100°C for 12h, and the resulting mixture was placed in a In a Furnace, bake at 700°C for 12 hours, and cool to room temperature to o...

Embodiment 2

[0031] 0.06mol of rutile titanium dioxide (TiO 2 ), 0.0201mol sodium hydroxide (NaOH), 0.01mol barium carbonate (BaCO 3 ) into an agate jar and add an appropriate amount of absolute ethanol for ball milling for 10 hours, put the agate jar in an oven to dry at 60°C, cool to room temperature, and then put it in a muffle furnace for pre-burning at 600°C for 4 hours, cool to room temperature, and then dry at 900°C Calcined at ℃ for 10h, cooled to room temperature, ball milled for 24h, and sieved to obtain the negative electrode material BaNa 2 Ti 6 o 14 . 0.01mol BaNa 2 Ti 6 o 14 , 0.000528mol lithium acetate (CH 3 COOLi·2H 2 O), 0.000896mol lanthanum acetate and 0.0016mol tetrabutyl titanate were dissolved in ethanol, stirred for 5h, then placed in a closed reaction kettle and kept at 160°C for 12h, cooled, dried at 80°C for 12h, and the resulting mixture Put it in a muffle furnace, bake at 600°C for 12 hours, and cool to room temperature to obtain BaNa, a negative elect...

Embodiment 3

[0033] 0.06mol of amorphous titanium dioxide (TiO 2 ), 0.02005mol sodium hydroxide (NaOH), and 0.01mol barium nitrate were placed in an agate jar, added an appropriate amount of absolute ethanol and ball-milled for 10 hours, put the agate jar in an oven to dry at 60°C, cooled to room temperature, and then placed in a muffle furnace Pre-calcined at 600°C for 6h, cooled to room temperature, calcined at 1100°C for 15h, cooled to room temperature, ball milled for 24h, and sieved to obtain the negative electrode material BaNa 2 Ti 6 o 14 . 0.01mol BaNa 2 Ti 6 o 14 , 0.000792mol of lithium hydroxide (LiOH), 0.001344mol of lanthanum nitrate and 0.0024mol of isopropyl titanate were dissolved in benzyl alcohol, stirred for 3-5h, then placed in a closed reactor and kept at 200°C for 12h, cooled, Dry at 80°C for 12 hours, put the resulting mixture in a muffle furnace, bake at 800°C for 12 hours, and cool to room temperature to obtain BaNa, a negative electrode material for lithium-...

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Abstract

The invention discloses a preparation method of a lithium ion battery composite anode material and belongs to the technical field of lithium ion batteries. The molecular formula of the lithium ion battery composite anode material is BaNa2Ti6O14-aLi3xLa2 / 3-xTiO3(LLTO), wherein a is more than or equal to 0.1 and less than or equal to 0.4, and x is more than or equal to 0.05 and less than or equal to 0.15. The preparation method comprises the following concrete steps: putting a barium source, a sodium source and a titanium source into a ball milling tank, carrying out ball milling, then putting into a muffle furnace for pre-sintering, cooling, carrying out ball milling in a ball milling machine, sieving, then putting into the muffle furnace for roasting, cooling, and carrying out ball milling, so that an anode material precursor is obtained; and dissolving a lithium source, a lanthanum source, a titanium source and the anode material precursor into an organic solvent, stirring, then transferring into a closed reaction kettle, carrying out heat preservation, cooling, carrying out suction filtration, drying, and putting the obtained mixture into the muffle furnace to be roasted, so that the BaNa2Ti6O14-aLi3xLa2 / 3-xTiO3(LLTO) composite anode material is obtained. The preparation method disclosed by the invention has the advantages that raw material sources are wide, the operation is simple, the controllability is good, the reproducibility is high, and the obtained material is smaller in particle, uniform in particle size distribution and high in degree of crystallinity, so that preparation cost of the material is reduced and the electrochemical performance of the material is also improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a high-performance lithium-ion battery composite negative electrode material. Background technique [0002] With the rapid development of the global economy, our original main energy sources: petroleum, coal, natural gas, etc. are non-renewable resources, and these fossil energy sources will also produce harmful gases when consumed, which will lead to more and more serious environmental pollution. It is of vital significance to develop new energy sources and environment-friendly energy sources. The development of various electronic devices as well as electric vehicles and hybrid vehicles has put forward higher requirements for lithium-ion batteries that provide energy for them. Lithium-ion batteries have the advantages of high output voltage, high energy density and power density, and long cycle life, and are recognized as the most promising power batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525
CPCH01M4/364H01M4/485H01M4/624H01M10/0525Y02E60/10
Inventor 伊廷锋朱彦荣
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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