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Method for carrying out manufacturing by serving carbon fiber cloth as lithium ion battery cathode slice

A lithium-ion battery, carbon fiber cloth technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as undisclosed carbon fiber tips, save auxiliary materials and production equipment, have good flexibility and toughness, and meet high current charge and discharge. Effect

Inactive Publication Date: 2015-04-22
江西华昊新能源有限公司
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  • 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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  • Method for carrying out manufacturing by serving carbon fiber cloth as lithium ion battery cathode slice
  • Method for carrying out manufacturing by serving carbon fiber cloth as lithium ion battery cathode slice
  • Method for carrying out manufacturing by serving carbon fiber cloth as lithium ion battery cathode slice

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Effect test

Embodiment 1

[0034] The carbon fiber spinnable pitch with a softening point of 250 ° C is heated to 280 ° C and melted into a liquid with a flowing state, the spinneret of the melt spinning machine is adjusted, and the pitch fiber precursor with a diameter of 20 ± 1 μm is collected. At a heating rate of 2 ℃ / min in the air, the temperature is raised to 230 ℃, and the oxidation treatment is carried out for 12 hours. The pre-oxidized silk cloth is obtained by drawing the oxidized raw silk, spinning and weaving, and the thickness is controlled at 140 ± 3 μm , the areal density is controlled at 31.3±0.5mg / cm2, the pre-oxygenated silk cloth is heated to 900°C at a heating rate of 10°C / min under the protection of inert gas, the high temperature is maintained for 2 hours, and then cooled to room temperature. The carbonized pre-oxidized silk cloth is then graphitized at high temperature, and the thickness of the finally obtained carbon fiber cloth is 130±3 μm, and the area density is 18.8±0.5 mg / cm2...

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 method for carrying out manufacturing by serving carbon fiber cloth as a lithium ion battery cathode slice comprises the steps that carbon fiber spinning asphalt is adopted as raw materials, and through protofilament manufacturing, protofilament pre-oxidation, stretch breaking and strip manufacturing, and spinning and weaving, pre-oxidation silk cloth is obtained; finally, carbonization, graphitization, slitting and pole lug welding are carried out, and the lithium ion battery cathode slice completely different from that of an existing manufacturing technology is obtained. The cathode slice manufactured through the method is adopted, so that a traditional manufacturing technology of the lithium ion battery cathode slice is changed, part of auxiliary materials and part of production equipment are omitted, and the production cost is greatly reduced; carbon cellosilk is interwoven in an intricate mode to form a good conductive network, the conductive performance is excellent, internal resistance of a final finished product battery can be greatly reduced, and the large-current charging and discharging requirements of a lithium ion power battery are met.

Description

technical field [0001] The present invention relates to a preparation method of a negative electrode sheet of a lithium ion battery. Specifically, the negative electrode sheet of the present invention adopts 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 the energy problem and realize low carbon and environmental protection, based on the current development level of energy technology, electric vehicle technology has gradually become the key direction 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 ...

Claims

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Application Information

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