Lithium titanate electrode material and preparation method thereof

An electrode material, lithium titanate technology, applied in the direction of negative electrode, battery electrode, active material electrode, etc., can solve the problems of environmental pollution, electrode battery capacity, unsatisfactory discharge rate, graphene is difficult to disperse uniformly, etc., to achieve electrical conductivity Excellent, beneficial to industrial applications, simple process effect

Active Publication Date: 2016-05-04
YINLONG ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by its preparation and stirring methods, graphene is difficult to disperse evenly in the slurry, and the performance of the electrode such as battery capacity and discharge rate is not ideal, and most of them are dispersed with organic solvents, which is easy to cause environmental pollution when the solvent is removed. Pollution

Method used

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  • Lithium titanate electrode material and preparation method thereof
  • Lithium titanate electrode material and preparation method thereof
  • Lithium titanate electrode material and preparation method thereof

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Embodiment 1

[0038] The preparation method of a kind of lithium titanate electrode slurry of this embodiment, its process flow chart is as follows figure 1 As shown, it specifically includes the following steps:

[0039] (1) Preparation of lithium titanate electrode material

[0040] (1) add graphene, carbon nanotube to stir after deionized water, sucrose, triton X-100 are mixed, control the mass concentration of graphene in deionized water to be 2%, the mass concentration of carbon nanotube to be 3%, The mass concentration of sucrose is 5%, the mass concentration of Triton X-100 is 3%, using a double planetary mixer, the revolution linear velocity is 15m / s, the rotation linear velocity is 20m / s, and stirred for 60min to obtain slurry A;

[0041] (2) Put the slurry A into a grinder and add zirconia with a diameter of 0.5 to 1mm for grinding at a speed of 200r / min, grind for 150min, then add lithium titanate to the grinded slurry A to control the grinded The weight ratio of slurry A to li...

Embodiment 2

[0047] In this embodiment, a preparation method of a lithium titanate electrode slurry comprises the following steps:

[0048] (1) Preparation of lithium titanate electrode material

[0049] (1) add graphene, carbon nanotube to stir after deionized water, sucrose, triton X-100 are mixed, control the mass concentration of graphene in deionized water to be 3%, the mass concentration of carbon nanotube to be 1%, The mass concentration of Triton X-100 is 5%, using a double planetary mixer with a revolution linear velocity of 15m / s and an autorotation linear velocity of 15m / s, and stirring for 30min to obtain slurry A;

[0050] (2) Put the slurry A into a grinder and add zirconia with a diameter of 0.5 to 1mm for grinding at a speed of 250r / min, grind for 60min, then add lithium titanate to the grinded slurry A to control the grinded The weight ratio of slurry A to lithium titanate is 6:4, using a double planetary mixer, stirring at a revolution linear velocity of 15m / s and a rota...

Embodiment 3

[0056] In this embodiment, a preparation method of a lithium titanate electrode slurry comprises the following steps:

[0057] (1) Preparation of lithium titanate electrode material

[0058] (1) add graphene, carbon nanotube to stir after deionized water, sucrose, Triton X-100 are mixed, control the mass concentration of graphene in deionized water to be 3%, the mass concentration of carbon nanotube to be 2%, The mass concentration of sucrose is 3%, and the mass concentration of Triton X-100 is 4%, using a double planetary mixer with a revolution linear velocity of 5 m / s and an autorotation linear velocity of 25 m / s, and stirring for 60 minutes to obtain slurry A;

[0059] (2) Put the slurry A into a grinder and add zirconia with a diameter of 0.5 to 1mm for grinding at a speed of 150r / min, grind for 300min, then add lithium titanate to the grinded slurry A to control the grinded The weight ratio of slurry A to lithium titanate is 6:4, using a double planetary mixer with a re...

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Abstract

The invention relates to a lithium titanate electrode material and a preparation method thereof. The preparation method of the lithium titanate electrode material comprises the following steps: (1) mixing water, saccharose and triton X-100, and adding graphene and a carbon nanotube for stirring to obtain slurry A; (2) feeding the slurry A to a grinder, adding zirconia particles for grinding at the rotating speed of 150-250r/min for 60-300 minutes, adding lithium titanate to the ground slurry A for mixing and stirring to obtain slurry B; and (3) carrying out drying treatment on the slurry B to obtain the lithium titanate electrode material. Compared with the prior art, by the lithium titanate electrode material, the battery capacity can be improved by 1%-8%; the discharge rate is improved by 1%-5%; rapid charging is achieved; and meanwhile, the problem of heating of the battery in the high-rate charge-discharge process can be reduced.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a lithium titanate electrode material and a preparation method thereof. Background technique [0002] With the vigorous development of electric vehicles and energy storage industries, the research and development of lithium-ion batteries with large capacity, long life, high safety and fast charging has attracted widespread attention. [0003] Lithium titanate with a spinel structure is called a "zero strain" material. It has the advantages of high safety, good charge and discharge performance, excellent cycle performance, and stable charge and discharge voltage platform. As a negative electrode material for lithium-ion power batteries, it has good Prospects. However, the intrinsic electronic conductivity and ionic conductivity of lithium titanate materials are relatively low, so the capacitance decays rapidly during high-current charging and discharging, and the rate perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/62H01M4/131H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/485H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 王永光蔡惠群李海军魏银仓
Owner YINLONG ENERGY CO LTD
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