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Preparation process of lithium titanate

A preparation process, lithium titanate technology, applied in the direction of titanium compounds, inorganic chemistry, electrical components, etc., can solve the problems of poor cycle performance, thermal runaway, electrolyte decomposition, etc., to reduce production costs, good stability, simple operation Effect

Inactive Publication Date: 2016-01-20
SICHUAN KENENG LITHIUM BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the potential of the carbon electrode after lithium insertion is very close to that of the metal, and most electrolytes are unstable at this potential, the electrolyte is easy to decompose on the electrode surface.
Therefore, when the battery is overcharged, very active metal lithium is easily precipitated on the surface of the carbon electrode, forming lithium dendrites, which may pierce the diaphragm and cause the risk of short circuit, as well as thermal runaway caused by high temperature, affecting the safety performance of the battery.
Researchers are also exploring many other negative electrode materials for lithium-ion batteries, such as lithium alloys, oxides, sulfides, and high molecular polymers. At present, these materials are not ideal, and some cannot solve the hidden dangers in safety, while others are Is the cycle performance is too poor, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation technology of lithium titanate comprises the following steps:

[0028] 1) Preparation of solvent: Mix polyethylene glycol and magnesium acetate at a mass ratio of 1:1 and dissolve them in pure water;

[0029] 2) Preparation of solute: Stir lithium carbonate into a suspension;

[0030] 3), transfer the solvent and solute in step 1) and step 2) together with titanium dioxide to the ball mill tank;

[0031] 4) One-time ball milling: ball mill the materials prepared in step 3), the ball milling time is 2 hours, and the frequency is 25Hz;

[0032] 5) Drying: transfer the ball-milled material in step 4) to a drying tray, and place it in a drying oven at 60°C for 12 hours;

[0033] 6) Crushing: use a mortar to crush the massive material obtained in step 5) until there is no obvious massive material, and then transfer to a porcelain boat;

[0034] 7), primary sintering: sintering the material obtained in step 6) in an air atmosphere, the sintering time is 4 h...

Embodiment 2

[0039] The preparation technology of lithium titanate comprises the following steps:

[0040] 1) Preparation of solvent: Mix polyethylene glycol and magnesium acetate at a mass ratio of 1:2 and dissolve them in pure water;

[0041] 2) Preparation of solute: Stir lithium carbonate into a suspension;

[0042] 3), transfer the solvent and solute in step 1) and step 2) together with titanium dioxide to the ball mill tank;

[0043] 4) One-time ball milling: ball mill the materials prepared in step 3), the ball milling time is 2 hours, and the frequency is 25Hz;

[0044] 5) Drying: transfer the ball-milled material in step 4) to a drying tray, and place it in a drying oven at 60°C for 12 hours;

[0045] 6) Crushing: use a mortar to crush the massive material obtained in step 5) until there is no obvious massive material, and then transfer to a porcelain boat;

[0046] 7), primary sintering: sintering the material obtained in step 6) in an air atmosphere, the sintering time is 4 h...

Embodiment 3

[0051] The preparation technology of lithium titanate comprises the following steps:

[0052] 1) Preparation of solvent: Mix polyethylene glycol and magnesium acetate at a mass ratio of 1:3 and dissolve them in pure water;

[0053] 2) Preparation of solute: Stir lithium carbonate into a suspension;

[0054] 3), transfer the solvent and solute in step 1) and step 2) together with titanium dioxide to the ball mill tank;

[0055] 4) One-time ball milling: ball mill the materials prepared in step 3), the ball milling time is 2 hours, and the frequency is 25Hz;

[0056] 5) Drying: transfer the ball-milled material in step 4) to a drying tray, and place it in a drying oven at 60°C for 12 hours;

[0057] 6) Crushing: use a mortar to crush the massive material obtained in step 5) until there is no obvious massive material, and then transfer to a porcelain boat;

[0058] 7), primary sintering: sintering the material obtained in step 6) in an air atmosphere, the sintering time is 4 h...

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PUM

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Abstract

The invention relates to a preparation process of lithium titanate. The preparation process comprises the following steps of preparing a solvent, preparing a lithium titanate solute, transferring the solvent, the solute and titanium dioxide into a spherulitic graphite tank, and carrying out one-time ball milling, drying, smashing, one-time sintering, second-time ball milling, atomization and second-time sintering. The lithium titanate material prepared according to the method is applied to a lithium battery prepared from a cathode material, and the lithium battery is high in discharging performance and stability performance. The preparation process is simple in operation and is friendly to environment, the production cost is reduced, and industrial production is promoted.

Description

technical field [0001] The invention relates to the field of lithium battery materials, in particular to a preparation process of lithium titanate. Background technique [0002] With the rapid development of transportation, communication and information industrialization, products such as electric vehicles, notebook computers and mobile communication tools have put forward higher and very urgent requirements for the development of new chemical power sources. The development of new secondary green batteries has become an inevitable need. Compared with traditional secondary batteries, lithium-ion batteries have rapidly become one of the most important batteries because of their unique advantages such as high energy density, high power density, high working voltage, low self-discharge rate, no memory effect, long cycle life, and no pollution. and state-of-the-art secondary batteries. It has become an ideal power source for small and lightweight electronic devices such as came...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/1391C01G23/00
CPCC01G23/00H01M4/1391H01M4/485Y02E60/10
Inventor 黄小丽岳波向中林王俊安周俊杰颜宇强
Owner SICHUAN KENENG LITHIUM BATTERY