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A kind of sheet-like mesoporous Li4Ti5O12 lithium-ion battery nano negative electrode material and its preparation method and application

A lithium-ion battery and negative electrode material technology, applied in battery electrodes, nanotechnology, nanotechnology, etc., can solve problems such as safety hazards, reduce polarization, solve low conductivity problems, and promote interaction effects

Active Publication Date: 2017-07-28
沈阳工大蓝金环保产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the commercial lithium-ion battery anode materials are lithium-intercalated carbon materials, but when the battery is overcharged or the temperature is too high, there are considerable safety hazards

Method used

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  • A kind of sheet-like mesoporous Li4Ti5O12 lithium-ion battery nano negative electrode material and its preparation method and application
  • A kind of sheet-like mesoporous Li4Ti5O12 lithium-ion battery nano negative electrode material and its preparation method and application
  • A kind of sheet-like mesoporous Li4Ti5O12 lithium-ion battery nano negative electrode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 A sheet-like mesoporous Li 4 Ti 5 o 12 Lithium ion battery nano anode material

[0022] Preparation:

[0023] 1) Preparation of precursor by hydrothermal reaction: at room temperature, 0.189-0.192g LiOH·H 2 O in 25-28ml of ethanol, after magnetic stirring is fully mixed, add 1.7-1.9ml of tetrabutyl titanate (TBT) dropwise, under dry conditions, react for 10-12h; add 25-30ml of deionized water to the reaction solution , stirred vigorously for 1-2min to obtain a milky white solution; move the milky white solution to the reaction kettle, react at 170-180°C for 34-37h; centrifuge, collect the powder precipitate at the bottom of the reaction kettle, wash with ethanol 4-6 times, and heat at 70-80°C Vacuum drying for 6-8 hours to obtain the product precursor;

[0024] 2) Calcinate the precursor in an air atmosphere at a high temperature of 490-500°C in a muffle furnace for 6-7h, cool naturally to room temperature, and grind to obtain the target product.

Embodiment 2

[0025] Example 2 A sheet-like mesoporous Li 4 Ti 5 o 12 Lithium ion battery nano anode material

[0026] Preparation:

[0027] 1) Preparation of precursor by hydrothermal reaction: at room temperature, 0.189-0.192g LiOH·H 2 O in 25-28ml of ethanol, after magnetic stirring is fully mixed, add 1.7-1.9ml of tetrabutyl titanate (TBT) dropwise, under dry conditions, react for 10-12h; add 25-30ml of deionized water to the reaction solution , stirred vigorously for 1-2min to obtain a milky white solution; move the milky white solution to the reaction kettle, react at 170-180°C for 34-37h; centrifuge, collect the powder precipitate at the bottom of the reaction kettle, wash with ethanol 4-6 times, and heat at 70-80°C Vacuum drying for 6-8 hours to obtain the product precursor;

[0028] 2) Calcinate the precursor in an air atmosphere at a high temperature of 590-600°C in a muffle furnace for 6-7h, cool naturally to room temperature, and grind to obtain the target product.

Embodiment 3

[0029] Example 3 A sheet-like mesoporous Li 4 Ti 5 o 12 Lithium ion battery nano anode material

[0030] Preparation:

[0031] 1) Preparation of precursor by hydrothermal reaction: at room temperature, 0.189-0.192g LiOH·H 2 O in 25-28ml of ethanol, after magnetic stirring is fully mixed, add 1.7-1.9ml of tetrabutyl titanate (TBT) dropwise, under dry conditions, react for 10-12h; add 25-30ml of deionized water to the reaction solution , stirred vigorously for 1-2min to obtain a milky white solution; move the milky white solution to the reaction kettle, react at 170-180°C for 34-37h; centrifuge, collect the powder precipitate at the bottom of the reaction kettle, wash with ethanol 4-6 times, and heat at 70-80°C Vacuum drying for 6-8 hours to obtain the product precursor;

[0032] 2) Calcinate the precursor in an air atmosphere at a high temperature of 690-700°C in a muffle furnace for 6-7h, cool naturally to room temperature, and grind to obtain the target product.

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Abstract

The invention relates to a lamellar mesoporous Li4Ti5O12 lithium ion battery anode nanomaterial, a preparation method thereof and the application thereof. According to the technical scheme of the invention, LiOH*H2O is added in ethanol at the room temperature, and the obtained reaction liquid is magnetically stirred. Then tetrabutyl titanate is added to react with the reaction liquid for 10-12 hours in the drying condition. After that, deionized water is added in the above reaction liquid and stirred to obtain a milky-white solution. The milky-white solution is moved into a reaction vessel to react at 170-180 DEG C for 34-37 hours. After the centrifugal separation process, deposits are collected, washed in ethanol and dried in vacuum to obtain a product precursor. The product precursor is placed in an air atmosphere, calcinated at 500-800 DEG C for 6-7 hours, cooled to the room temperature and ground to obtain a target product. According to the invention, the potential safety hazard problem of lithium-intercalation carbon materials is solved. Meanwhile, since the material is of a mesoporous lamellar nanostructure, more electrochemical active sites are provided. In this way, the transmission path of electrons and Li+ is greatly shortened. The high-rate electrochemical performance of the material is further improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a Li battery with a sheet-like mesoporous structure. 4 Ti 5 o 12 Lithium-ion battery nano negative electrode material and preparation method thereof. Background technique [0002] In recent years, with the continuous improvement of clean energy requirements, lithium-ion batteries, as a new generation of green high-energy batteries, due to their high energy density, high output power, long service life, small self-discharge, no memory effect, and wide operating temperature range (-20°C ~ 60°C), good cycle performance, fast charging and discharging, high charging efficiency (up to 100%), no environmental pollution or little pollution, etc., has become a rechargeable battery for large-scale applications today. The main selection object. [0003] At present, most of the commercialized lithium-ion battery anode materials are lithium-intercalated carbon materials, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M10/0525B82Y30/00B82Y40/00C01G23/00
CPCB82Y30/00B82Y40/00C01G23/00C01P2004/64H01M4/485H01M10/0525Y02E60/10
Inventor 葛昊陈丽郝婷婷田辉宋赢宋溪明
Owner 沈阳工大蓝金环保产业技术研究院有限公司
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