Method for preparing spinel lithium titanate nano piece and application of spinel lithium titanate nano piece in lithium battery

A technology of lithium lithium titanate and nanosheets, which is applied in the preparation of spinel lithium titanate nanosheets and its application in lithium batteries, can solve problems such as potential safety hazards and metal lithium deposition, and achieve easy operation and low cost. Low, high-purity effect

Inactive Publication Date: 2011-05-18
FUZHOU UNIVERSITY
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Problems solved by technology

However, the surface of traditional graphite may cause deposition of metal

Method used

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  • Method for preparing spinel lithium titanate nano piece and application of spinel lithium titanate nano piece in lithium battery

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[0010] The specific steps of a preparation method of spinel lithium titanate nanosheets are as follows: mixing 0.5-2.0 grams of titanium dioxide powder with 40-50 milliliters of potassium hydroxide solution with a concentration of 10-20 mol / liter, at 160 ℃-200 ℃ Reaction for 48-96h, after the reactant is washed with dilute hydrochloric acid, take 0.1-0.5 g of reactant and mix it with 0.1-0.15 mol / L lithium hydroxide solution in a molar ratio of 0.5-2:4-6, and hydrothermally at 140-200 ° C The reaction is carried out for 12-48 hours, and then calcined at 350-750° C. for 1-5 hours to obtain the spinel lithium titanate nanosheets.

[0011] A specific method for the application of spinel lithium titanate nanosheets in lithium batteries is: lithium battery assembly: according to the mass ratio of Li 4 Ti 5 O 12 : Polyvinylidene fluoride: Acetylene black = 60-75: 5-10: 15-30 After mixing and grinding, spread evenly on 0.25cm 2 The positive electrode is made of copper sheet, the n...

Example Embodiment

[0013] Example 1

[0014] The specific steps of a preparation method of spinel lithium titanate nanosheets are as follows: mixing 2.0 grams of titanium dioxide powder with 40 milliliters of potassium hydroxide solution with a concentration of 20 mol / liter, reacting at 160° C. for 96 hours, and then reacting the reactants with dilute hydrochloric acid After washing, 0.1 g of reactant was mixed with 0.15 mol / L lithium hydroxide solution in a molar ratio of 1:5, hydrothermally reacted at 140 ° C for 48 h, and then calcined at 350 ° C for 5 h to obtain the spinel titanic acid. Lithium nanosheets.

[0015] A specific method for the application of spinel lithium titanate nanosheets in lithium batteries is: lithium battery assembly: according to the mass ratio of Li 4 Ti 5 O 12 : Polyvinylidene fluoride: Acetylene black = 75:10:15 Mix and grind and apply evenly to 0.25cm 2 The positive electrode is made of copper sheet, the negative electrode is metal lithium, and the electrolyte...

Example Embodiment

[0016] Example 2

[0017] The specific steps of a preparation method of spinel lithium titanate nanosheets are as follows: mixing 0.5 g of titanium dioxide powder with 50 ml of potassium hydroxide solution with a concentration of 10 mol / liter, reacting at 200° C. for 48 hours, and then reacting the reactants with dilute hydrochloric acid After washing, 0.5 g of reactant was mixed with 0.1 mol / liter lithium hydroxide solution in a molar ratio of 0.5:4, hydrothermally reacted at 200 ° C for 12 h, and then calcined at 750 ° C for 1 h to obtain the spinel lithium titanate Nanosheets.

[0018] A specific method for the application of spinel lithium titanate nanosheets in lithium batteries is: lithium battery assembly: according to the mass ratio of Li 4 Ti 5 O 12 : Polyvinylidene fluoride: Acetylene black = 70: 5: 25 After mixing and grinding, spread evenly on 0.25cm 2 The positive electrode is made of copper sheet, the negative electrode is metal lithium, and the electrolyte i...

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Abstract

The invention relates to a method for preparing a spinel lithium titanate nano piece and application of the spinel lithium titanate nano piece in a lithium battery. In the method, a high-purity (more than 95 percent) spinel Li4Ti5O12 nano piece is synthesized for the first time, the length is about dozens of to hundreds of nano, and the width is about dozens of nano. When the high-purity spinel Li4Ti5O12 nano piece is use as the anode material of the lithium battery, results indicate that the high-purity spinel Li4Ti5O12 nano piece has favorable rapid charge and discharge performance and high circulating stability.

Description

technical field [0001] The invention belongs to a preparation method of spinel lithium titanate nanosheets and its application in lithium batteries. Background technique [0002] Lithium-ion batteries have significant advantages such as high voltage, high capacity, and long cycle life, and are currently widely used in mobile electronic equipment, defense industry, electric vehicles and other fields. Among them, due to the needs of energy and environmental protection, electric vehicles have become the most concerned industry in the current new energy field. Therefore, the development of high-performance lithium-ion power batteries has become one of the most popular research fields in recent years. Power battery electrode materials include positive electrode materials and negative electrode materials. Graphite is a negative electrode material that has been widely used in practical production. However, the traditional graphite may cause the deposition of metallic lithium on t...

Claims

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Application Information

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IPC IPC(8): H01M4/1391B82Y40/00H01M4/131
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 魏明灯洪振生
Owner FUZHOU UNIVERSITY
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