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Preparation method of porous carbon coated aluminum foil material for lithium ion battery

A lithium-ion battery and aluminum foil technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of reducing material strength, poor physical properties of aluminum foil, poor adhesion of aluminum foil, etc., to improve process capability, increase battery energy density, The effect of increasing the design capacity

Inactive Publication Date: 2019-12-17
成都格力钛新能源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the physical properties of the aluminum foil prepared by the microporous technology of the materials used by various lithium battery enterprises are poor. Poor performance, the effect is not obvious during use

Method used

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  • Preparation method of porous carbon coated aluminum foil material for lithium ion battery
  • Preparation method of porous carbon coated aluminum foil material for lithium ion battery
  • Preparation method of porous carbon coated aluminum foil material for lithium ion battery

Examples

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Embodiment 1

[0032] Embodiment 1 of the present invention provides a preparation method of a porous carbon-coated aluminum foil material for a lithium-ion battery, which is achieved through the following steps:

[0033] (1) With the inert electrode as the cathode and the aluminum foil as the anode, the aluminum foil is dragged by rollers through the electrolytic cell for direct current electrolysis. The inert graphite cathode is a graphite plate, and the electrolytic cell is provided with a mixed solution of hydrochloric acid and potassium chloride at a temperature of 30° C., wherein the concentration of the hydrochloric acid is 1mol / L, and the concentration of potassium chloride is 2mol / L. Solution current density is 0.5A / cm 2 , and the time is 12 minutes; the treated aluminum foil is washed with industrial deionized water and wound up to obtain an aluminum foil coil.

[0034] (2) The treated aluminum foil coil is put into a vacuum heat treatment furnace and heated to 240-300°C with the ...

Embodiment 2

[0038] Embodiment 2 of the present invention provides a preparation method of a porous carbon-coated aluminum foil material for a lithium-ion battery, which is achieved through the following steps:

[0039] (1) With the inert electrode as the cathode and the aluminum foil as the anode, the aluminum foil is dragged by rollers through the electrolytic cell in sequence for DC electrolysis. The inert graphite cathode is a graphite flat plate, and the electrolytic cell is provided with a mixed solution of hydrochloric acid and potassium chloride at a temperature of 30° C., wherein the concentration of the hydrochloric acid is 5mol / L, and the concentration of potassium chloride is 3mol / L. Solution current density is 0.8A / cm 2 , the time is 4min. Then, the above-mentioned treated aluminum foil is washed with industrial deionized water and wound up to obtain an aluminum foil coil.

[0040] (2) The treated aluminum foil coil is put into a vacuum heat treatment furnace and heated to 2...

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Abstract

The invention discloses a preparation method of a porous carbon coated aluminum foil material for a lithium ion battery, which comprises the steps of 1, taking an inert electrode as a cathode and an aluminum foil as an anode, dragging the aluminum foil through a roller to sequentially pass through an electrolytic bath for direct current electrolysis, and then cleaning and rolling the aluminum foilsubjected to direct current electrolysis to obtain an aluminum foil coiled material; 2, placing the aluminum foil coiled material into a vacuum heat treatment furnace, heating the aluminum foil coiled material to a temperature of 240-300 DEG C along with the furnace, conducting heat preservation for 2-4h, cooling the aluminum foil coiled material to a temperature of 40-80 DEG C along with the vacuum heat treatment furnace, and conducting air cooling to the room temperature; 3, preparing graphene, carbon nanotubes, conductive carbon black, a binder and butadiene styrene rubber into slurry; and4, coating the aluminum foil coiled material with the slurry through an intaglio coating technology to obtain the porous carbon coated aluminum foil material for the lithium ion battery. The method can improve the material processing capacity, improve the design capacity of the battery and improve the energy density of the battery.

Description

technical field [0001] The invention belongs to the technical field of lithium batteries, and in particular relates to a preparation method of a porous carbon-coated aluminum foil material for lithium ion batteries. Background technique [0002] The positive and negative materials of lithium batteries are copper foil and aluminum foil. At present, the most commonly used base materials for positive and negative current collectors of lithium batteries are double-sided smooth aluminum foil, copper foil, or simply treated rough surface; the most important defect is The reason is that the adhesion strength of the surface material is not high, and it is easy to fall off, which directly affects the service life of the lithium battery. At the same time, it cannot adapt to the use environment of special states (high temperature and low temperature). [0003] Porous metal materials have received extensive attention at present, because their open pore structure is very suitable for ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/70H01M10/0525
CPCH01M4/667H01M4/661H01M4/663H01M4/70H01M10/0525Y02E60/10
Inventor 张洪旭李静国海超
Owner 成都格力钛新能源有限公司
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