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Anode material of lithium-ion cell

A positive electrode material, lithium ion technology, applied in the field of lithium ion battery positive electrode material and its preparation, can solve the problems affecting the specific gravity of lithium cobalt oxide, battery capacity reduction, poor conductivity, etc., to achieve structural stability, increase capacity, and cycle long life effect

Inactive Publication Date: 2013-04-03
DONGGUAN ADF BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the proportion of conductive agent is relatively high. Compared with carbon fiber tubes, conductive graphite and conductive carbon black have poor conductivity, so their proportion in the proportion is relatively high, which affects the proportion of lithium cobaltate in the proportion. , further reducing the battery capacity

Method used

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  • Anode material of lithium-ion cell
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  • Anode material of lithium-ion cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A lithium ion battery cathode material, including 96.5% lithium cobalt oxide, 1.5% carbon fiber tube and 2.0% PVDF calculated by weight percentage.

[0024] The preparation steps of the lithium ion battery cathode material are as follows:

[0025] A. Add the formulated amount of binder and 10 times the weight of the binder N-methylpyrrolidone (NMP) into the mixing tank, and stir at a speed of 30 revolutions / sec; rotation at a speed of 25 revolutions / sec until it is bonded. After the agent is fully dissolved in the solvent, add the formula amount of carbon nanotubes, and stir at a speed of 30 revolutions per second and 25 revolutions per second for 5 hours until the conductive agent is evenly dispersed in the solution;

[0026] B. Add the formula amount of lithium cobalt oxide to the mixing tank, and stir at a speed of 30 revolutions per second and 25 revolutions per second for 3 hours until the lithium cobalt oxide is uniformly dispersed to obtain a suspension;

[0027] C. Add ...

Embodiment 2

[0031] A lithium-ion battery cathode material, including N-methylpyrrolidone (NMP) solvent-configured cathode slurry calculated by weight percentage. The materials used are: lithium cobaltate 98.6%, carbon fiber tube 0.6% and PVDF. .8%.

[0032] The preparation steps of the lithium ion battery cathode material are as follows:

[0033] First, the carbon nanotubes are frosted for 4 hours;

[0034] A. Add the formulated amount of binder and 20 times the weight of the binder N-methylpyrrolidone (NMP) to the mixing tank, and stir at a speed of 40 revolutions / sec; rotation at a speed of 30 revolutions / sec until it is bonded. After the agent is fully dissolved in the solvent, add the carbon nanotubes of the formula, and stir at a speed of 40 revolutions per second and 26 revolutions per second for 5 hours until the conductive agent is evenly dispersed in the solution;

[0035] B. Add the formula amount of lithium cobalt oxide to the mixing tank, and stir at a speed of 40 revolutions per sec...

Embodiment 3

[0040] A lithium-ion battery cathode material, including N-methylpyrrolidone (NMP) solvent-configured cathode slurry calculated by weight percentage, the materials used are: lithium cobaltate 97.5%, carbon fiber tube 1.5% and PVDF1 .0%.

[0041] The preparation steps of the lithium ion battery cathode material are as follows:

[0042] First, the carbon nanotubes are frosted for 2 hours;

[0043] A. Add the formulated amount of binder and 12 times the weight of the binder N-methylpyrrolidone (NMP) to the mixing tank, and stir at a speed of 35 revolutions / sec; rotation at a speed of 28 revolutions / sec until it is bonded. After the agent is fully dissolved in the solvent, add the formula amount of carbon nanotubes, and stir at a speed of 34 revolutions per second and 27 revolutions per second for 5 hours until the conductive agent is evenly dispersed in the solution;

[0044] B. Add the formula amount of lithium cobalt oxide to the mixing tank, and stir at a speed of 35 revolutions per ...

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Abstract

The invention relates to the technical field of lithium-ion cells, and in particular relates to a positive pole material of a lithium-ion cell and a preparation method of the positive pole material. The positive pole material comprises the following components in percentage by weight: 96.5-98.6% of lithium cobalt oxide, 0.8-2.0% of a binding agent and 0.6-1.5% of a carbon fiber tube. According to the preparation method, the carbon nano tube is used as a conductive agent, the use addition amount of the conductive agent is reduced, the preparation is simple, the performance of a prepared product is stable, particularly the specific capacity is high, and the positive pole material is suitable for requirements of high specific capacity of the battery in modern portable electrical equipment.

Description

Technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery anode material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have received great attention due to their advantages of high specific energy and high voltage, and have become a hot spot and focus of product development in the international battery industry. At present, lithium-ion batteries have been widely used in mobile communications, portable notebook computers, cameras, portable instruments and meters. With the high-energy and light-weight of these appliances, the demand for high-capacity lithium-ion batteries is increasing. urgent. Lithium cobalt oxide has the following advantages, good structure, suitable for lithium ion insertion, mature preparation process, high open circuit voltage, fast charge and discharge, superior electrochemical performance: high specific energy, long cycle life, excellent proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131H01M4/525H01M4/62
CPCY02E60/10
Inventor 殷汝学林鸿鹏
Owner DONGGUAN ADF BATTERY
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