Preparation method of high-safety performance lithium-ion battery

A lithium-ion battery and safety performance technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery electrodes, etc., can solve the problems of low energy energy density and discontinuity, and achieve high energy density, high mechanical strength, and high temperature resistance. Good results

Active Publication Date: 2017-05-17
湖南聚和源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, non-polluting renewable energy sources such as solar energy and wind energy need to be converted into electric energy before they can be used. However, these energy sources have low energy d

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of a lithium-ion battery with high safety performance, comprising the following steps:

[0037] (1) Preparation of positive electrode sheet:

[0038] Mix and stir zinc acetate and absolute ethanol evenly, then stir in a constant temperature water bath at 40°C for 2 hours to obtain a transparent solution; add triethanolamine to the transparent solution, and continue stirring for 1 hour to obtain a zinc sol; add lithium cobaltate to the zinc sol Continue stirring until the solvent in the sol is completely removed, then dry it at 85°C, and finally put it in a muffle furnace, first raise the temperature to 400°C at a heating rate of 2°C / min, keep the temperature for 30min, and then increase the temperature at 6°C / min The heating rate was raised to 520°C, and the temperature was kept constant for 2 hours. Finally, the temperature was raised to 640°C at a heating rate of 5°C / min, and the temperature was kept constant for 80 minutes. 2+ The molar concentr...

Embodiment 2

[0049] A preparation method of a lithium-ion battery with high safety performance, comprising the following steps:

[0050] (1) Preparation of positive electrode sheet:

[0051] Mix and stir zinc acetate and absolute ethanol evenly, then stir in a constant temperature water bath at 45°C for 1.8 hours to obtain a transparent solution; add triethanolamine to the transparent solution, and continue stirring for 1.5 hours to obtain a zinc sol; add lithium cobaltate to In the zinc sol, continue to stir until the solvent in the sol is completely removed, then dry it at 95°C, and finally place it in a muffle furnace, first raise the temperature to 420°C at a heating rate of 3°C / min, keep the temperature for 25min, and then heat it at 7°C The temperature was raised to 540°C at a heating rate of 5.5°C / min, and the temperature was kept constant for 1.8 hours. Finally, the temperature was raised to 680°C at a heating rate of 5.5°C / min, and the temperature was kept constant for 70 minutes....

Embodiment 3

[0062] A preparation method of a lithium-ion battery with high safety performance, comprising the following steps:

[0063] (1) Preparation of positive electrode sheet:

[0064] Mix and stir zinc acetate and absolute ethanol evenly, then stir in a constant temperature water bath at 50°C for 1.6 hours to obtain a transparent solution; add triethanolamine to the transparent solution, and continue stirring for 2 hours to obtain a zinc sol; add lithium cobaltate to zinc In the sol, continue to stir until the solvent in the sol is completely removed, then dry it at 110°C, and finally place it in a muffle furnace, first raise the temperature to 440°C at a heating rate of 4°C / min, keep the temperature for 20min, and then increase the temperature at 8°C / min. The temperature was raised to 560°C at a heating rate of 1.6 hours, and finally the temperature was raised to 710°C at a heating rate of 6°C / min, and the temperature was kept at a constant temperature for 60 minutes. 2+ The molar...

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Abstract

The invention discloses a preparation method of a high-safety performance lithium-ion battery. The method comprises the following steps of adopting zinc oxide-coated lithium cobalt oxide as a positive electrode material, mixing the positive electrode material, a conductive agent, a binder and deionized water into slurry and coating a current collector to prepare a positive plate; adopting lithium titanate coated with a mixture of titanium oxide and silicon oxide as a negative electrode material and then mixing the negative electrode material, the binder, the conductive agent and the deionized water into slurry and coating the current collector to prepare a negative plate; adopting a prepared zirconia-reinforced aluminum oxide porous ceramic membrane as the membrane; and finally assembling the lithium-ion battery. The battery prepared by the method is good in high temperature resistance, excellent in cycling stability, high in energy density, safe and environment-friendly.

Description

[0001] Technical field: [0002] The invention relates to the field of batteries, in particular to a preparation method of a lithium-ion battery with high safety performance. [0003] Background technique: [0004] Since the beginning of the 21st century, traditional petrochemical energy is facing serious pollution and depletion, and the search for clean and pollution-free new energy has become the focus of attention. At present, non-polluting renewable energy sources such as solar energy and wind energy need to be converted into electric energy before they can be used. However, these energy sources have low energy density and discontinuous problems. In order to ensure the continuity of energy supply, it is necessary to develop large-scale Large-scale power storage equipment to build an "electricity storage" system. As a simple and efficient energy storage and supply device, the secondary battery is currently the best power reserve, and will play an important role in the devel...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M10/058H01M2/16H01M4/36H01M4/485H01M4/525
CPCH01M4/366H01M4/485H01M4/525H01M10/0525H01M10/058H01M50/431Y02E60/10Y02P70/50
Inventor 王海燕
Owner 湖南聚和源科技有限公司
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