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A kind of lithium titanate material and its preparation and application

A technology of lithium titanate and lithium titanate, applied in the field of electrochemical energy storage, can solve problems such as battery performance degradation

Active Publication Date: 2020-05-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the mature industrial development has not been realized so far. The main reason is that the lithium titanate battery has the "gas expansion problem" during the charge-discharge cycle and storage process, that is, the gas is continuously generated inside the battery, resulting in a sharp decline in battery performance, which restricts practical applications. The biggest obstacle, and has become the consensus of the industry

Method used

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  • A kind of lithium titanate material and its preparation and application

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Effect test

Embodiment 1

[0018] Put 10g of lithium titanate powder with a particle size of 10 microns and 5g of fluorinated graphene into 100ml of absolute ethanol, ultrasonically disperse for 10 hours, centrifuge, remove the supernatant, and vacuum-dry the precipitate at 100 degrees to obtain fluorine-containing Lithium titanate material of graphene.

Embodiment 2

[0020] Put 10g of lithium titanate powder with a particle size of 20 microns and 4g of fluorinated graphite into 100ml of acetone, ultrasonically disperse for 12 hours, centrifuge, remove the supernatant, and vacuum-dry the precipitate at 80 degrees to obtain fluorinated graphene lithium titanate material.

Embodiment 3

[0022] Put 10g of lithium titanate powder with a particle size of 50 microns and 5g of fluorinated graphene into 100ml of absolute ethanol, ultrasonically disperse for 10 hours, centrifuge, remove the supernatant, and vacuum-dry the precipitate at 100 degrees to obtain fluorine-containing Lithium titanate material of graphene.

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Abstract

The invention relates to a modified lithium titanate material. The modified lithium titanate material is prepared by mixing lithium titanate powder with fluorinated graphene and / or fluorinated graphite at mass ratio of 100-1 to 1-4. The modified lithium titanate material can be used as an electrode material in a lithium titanate battery or a lithium titanate capacitor. The modified lithium titanate material is capable of effectively restraining the swelling problem of the lithium titanate battery.

Description

technical field [0001] The invention relates to the field of electrochemical energy storage, in particular to a lithium titanate battery and a lithium titanate capacitor. Background technique [0002] Spinel-type lithium titanate (LTO), because it basically does not deform during charging and discharging, is called a zero-strain electrode material. It has a good application prospect. The advantages of LTO are mainly reflected in the following aspects: 1. LTO has a large solid diffusion coefficient of lithium ions, and has excellent fast charge and fast discharge performance (>80% DOD in 5 minutes); 2. Compared with graphite and other negative electrodes, LTO has Excellent low temperature performance; 3. Good safety. There will be no potential safety hazards such as lithium dendrites in negative electrodes such as graphite. 4. Excellent cycle performance. In summary, due to the excellent structural stability and safety performance of lithium titanate materials, it is c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M10/0525H01G11/46
CPCH01G11/46H01M4/485H01M10/0525Y02E60/10Y02E60/13
Inventor 曲超张华民张洪章李先锋刘翠连
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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