Battery composite material and preparation method thereof, electrode sheet and battery

A composite material and battery technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of poor cycle performance and rapid capacity depletion of tin dioxide batteries, achieve high specific capacity, solve poor cycle performance, Resolving the effect of rapid volume exhaustion

Inactive Publication Date: 2019-11-05
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a battery composite material and its preparation method, electrode sheet and battery, which overcomes the volume expansion effect of the tin dioxide battery negative electrode material in the process of charging and discharging, and effectively solves the problem of excessive capacity failure of the tin dioxide battery. Technical problem of poor cycle performance

Method used

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  • Battery composite material and preparation method thereof, electrode sheet and battery
  • Battery composite material and preparation method thereof, electrode sheet and battery
  • Battery composite material and preparation method thereof, electrode sheet and battery

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The embodiment of the present application provides the first battery, and the specific steps are as follows:

[0042] 1. Make a mixed solution of 0.4g tin dioxide, 2g citric acid, 0.2g polyvinylidene fluoride, 14g sodium chloride and 50ml deionized water, put a stirring bar in the solution, put it in a beaker, and put it in a magnetic stirrer Stir on for 1h. The obtained solution was put into a ball mill jar and ball milled for 20 hours without interruption in one direction to obtain a mixture.

[0043] 2. Put the mixture in step 1 into a drying oven at 80° C. to dry to obtain a precipitate, and put the obtained precipitate into a mortar and grind it into tiny particles.

[0044] 3. Put the tiny precipitate in step 2 into the porcelain ark, and use nitrogen as a protective gas to calcinate in a calcination furnace at 500° C. for 2 hours to obtain a battery composite material.

[0045] 4. In order to remove impurities in the battery composite material, the battery comp...

Embodiment 2

[0050] The embodiment of the present application provides the second battery, and the specific steps are as follows:

[0051] 1. Make a mixed solution of 0.4g tin dioxide, 2g citric acid, 0.2g polyvinylidene fluoride, 14g sodium chloride and 50ml deionized water, put a stirring bar in the solution, put it in a beaker, and put it in a magnetic stirrer Stir on for 1h. The obtained solution was put into a ball mill jar and ball milled for 20 hours without interruption in one direction to obtain a mixture.

[0052] 2. Put the mixture in step 1 into a drying oven at 80° C. to dry to obtain a precipitate, and put the obtained precipitate into a mortar and grind it into tiny particles.

[0053] 3. Put the tiny precipitate in step 2 into the porcelain ark, and use nitrogen as a protective gas to calcinate in a calciner at 700°C for 2 hours to obtain a battery composite material.

[0054] 4. In order to remove impurities in the battery composite material, the battery composite materi...

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Abstract

The invention belongs to the technical field of battery materials, and particularly relates to a battery composite material and a preparation method thereof, an electrode sheet and a battery. The application provides a preparation method of a battery composite material, which comprises the following steps: S1, mixing citric acid, polyvinylidene fluoride, sodium chloride, tin dioxide and solvent toform a mixture; S2, drying the mixture to obtain a precipitate; and S3, calcining the precipitate in a protective atmosphere to obtain a battery composite material. The application also discloses thebattery composite material, an electrode sheet and a battery. The battery composite material provided by the application can overcome the volume expansion effect of the tin dioxide battery negative electrode material in the charging and discharging process, and the technical problems of excessive capacity depletion and poor cycle performance of tin dioxide batteries are solved.

Description

technical field [0001] The invention belongs to the technical field of battery materials, and in particular relates to a battery composite material, a preparation method thereof, an electrode sheet and a battery. Background technique [0002] With the development of microelectronics technology in the 21st century, miniaturized equipment is increasing day by day, which puts forward high requirements for power supply. The battery has entered a large-scale practical stage. Due to its high energy density, fast charging and discharging performance, good cycle life, reliable safety and other characteristics, ion batteries have been widely used in portable electrical appliances such as laptop computers, cameras, and mobile communications due to their unique performance advantages. The currently developed large-capacity ion batteries have been used in electric vehicles and are expected to become one of the main power sources for electric vehicles in the 21st century, and will be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62H01M4/131H01M10/0525
CPCH01M4/131H01M4/483H01M4/624H01M4/625H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 白晨何苗冯叶锋熊德平
Owner GUANGDONG UNIV OF TECH
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