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A kind of carbon fiber cloth is used as the preparation method of lithium-ion battery negative plate

A technology of lithium-ion batteries and carbon fiber cloth, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of undisclosed carbon fiber tips, etc., and achieve the effects of saving auxiliary materials and production equipment, reducing production costs, good flexibility and toughness

Inactive Publication Date: 2017-01-18
江西华昊新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] None of the above patents discloses that carbon fiber is simply used as a negative electrode of lithium-ion batteries, and the method of using carbon fiber to prepare carbon fiber cloth negative electrode sheet

Method used

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  • A kind of carbon fiber cloth is used as the preparation method of lithium-ion battery negative plate
  • A kind of carbon fiber cloth is used as the preparation method of lithium-ion battery negative plate
  • A kind of carbon fiber cloth is used as the preparation method of lithium-ion battery negative plate

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Experimental program
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Embodiment 1

[0034] Heat the carbon fiber spinnable pitch with a softening point of 250°C to 280°C to melt it into a fluid liquid, adjust the spinneret of the melt spinning machine to obtain pitch fiber precursors with a diameter of 20±1μm, and place the precursors in In the air, the temperature is raised to 230°C at a heating rate of 2°C / min, and the oxidation treatment is performed for 12 hours. The pre-oxidized silk cloth is obtained by stretching, cutting, spinning and weaving the oxidized raw silk, and the thickness is controlled at 140±3μm. , the surface density is controlled at 31.3±0.5mg / cm2, the pre-oxidized silk cloth is under the protection of an inert gas, and the temperature is raised to 900 °C at a heating rate of 10 °C / min, kept at a high temperature for 2 hours, and then cooled to room temperature. The carbonized pre-oxidized silk cloth is then subjected to high-temperature graphitization, and the thickness of the finally obtained carbon fiber cloth is 130±3μm, and the surfa...

Embodiment 2

[0039]Heat the carbon fiber spinnable pitch with a softening point of 200°C to 250°C to melt it into a fluid liquid, adjust the spinneret of the melt spinning machine, and collect pitch fiber precursors with a diameter of 5±1 μm, and place the precursors in In the air, the temperature is raised to 200°C at a heating rate of 1.5°C / min, and the oxidation treatment is carried out for 10 hours. The pre-oxidized silk cloth is obtained by stretching, cutting, spinning and weaving the oxidized raw silk, and the thickness is controlled at 105±3μm. , the surface density is controlled at 23.5±0.5mg / cm2, the pre-oxidized silk cloth is under the protection of an inert gas, and the temperature is raised to 850 °C at a heating rate of 5 °C / min, kept at a high temperature for 1 hour, and then cooled to room temperature. Then the carbonized pre-oxidized silk cloth is subjected to high-temperature graphitization, and the thickness of the finally obtained carbon fiber cloth is 98±3μm, and the su...

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Abstract

A manufacturing method of a carbon fiber fabric used as a cathode sheet of a lithium ion battery. The method employs a carbon fiber spinnable pitch as a raw material, and comprises preparing a precursor, pre-oxidizing the precursor, and stretch-breaking, spinning and weaving the same to obtain a pre-oxidized fiber, then performing carbonization, graphitization, cutting, and electrode lug welding thereon to obtain a cathode sheet of a lithium ion battery, wherein said manufacturing processes differ completely from current manufacturing processes. The cathode sheet manufactured by the method changes a traditional manufacturing process, and conserves auxiliary materials and the use of manufacturing devices, thus greatly reducing manufacturing costs. In the invention, interwoven carbon fiber filaments form an advantageous electrically conducting network with good electrical conductivity, thereby greatly reducing an internal resistance of a manufactured battery, and meeting the need for a high current of the lithium ion battery upon charging and discharging.

Description

technical field [0001] The invention relates to a method for preparing a negative electrode sheet of a lithium ion battery. Specifically, the negative electrode sheet of the invention uses carbon fiber cloth. Background technique [0002] With the development of the automobile industry, the depletion of non-renewable fossil fuels such as oil and natural gas has attracted increasing attention, and air pollution and room temperature effects have also become global problems. In order to solve energy problems and achieve low-carbon environmental protection, based on the current level of energy technology development, electric vehicle technology has gradually become the focus of global economic development. The United States, Japan, Germany, China and other countries have successively restricted the use of fuel vehicles and vigorously developed electric vehicles. As the core component of electric vehicles, the power battery has also ushered in a great opportunity for development....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1393H01M4/587
CPCH01M4/1393H01M4/587Y02E60/10
Inventor 田东韩飞王爽
Owner 江西华昊新能源有限公司