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Nano metal hollow fiber felt current collector and preparation method thereof, lithium ion battery pole piece and lithium ion battery

A nano-metal and nano-fiber technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of not fully reflecting the unique properties of materials, limiting the application of lithium-ion batteries, and having a large impact on irreversible properties. Good prospects for industrial application, small effect of irreversible properties, good reproducibility

Active Publication Date: 2021-05-18
湖南桑瑞新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these current collectors have disadvantages such as low conductivity, excessive influence of irreversible properties, and high cost, which cannot fully reflect the unique properties of the material and limit its application in lithium-ion batteries.

Method used

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  • Nano metal hollow fiber felt current collector and preparation method thereof, lithium ion battery pole piece and lithium ion battery
  • Nano metal hollow fiber felt current collector and preparation method thereof, lithium ion battery pole piece and lithium ion battery
  • Nano metal hollow fiber felt current collector and preparation method thereof, lithium ion battery pole piece and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Preparation of PVDF membrane template:

[0066] First, turn on the high-voltage power supply of the electrospinning device to preheat for half an hour; then, weigh PVDF with a mass fraction of 12%, dissolve it in acetone and N,N-dimethylacetamide with a mass ratio of 3:7 In the mixed solvent, put it on a magnetic stirrer, control the temperature at 30°C, heat until the solution becomes a transparent, uniform, and bubble-free electrospinning solution, and cool for 30 minutes. Before injecting the electrospinning solution, cut the needle of the syringe into a flat mouth, and the spinning solution in the syringe is about 3ml (control the film thickness at about 40 μm). Put the aluminum foil paper on the glass plate as the receiving screen, adjust the spinning voltage and the distance between the bottom of the needle tube and the receiving glass plate, and pay attention to controlling the flow rate of the syringe pump, and start spinning. Finally, the fiber film (nanofiber...

Embodiment 2

[0082] Preparation of polystyrene (PS) membrane template:

[0083] First, turn on the high-voltage power supply of the electrospinning device to preheat for half an hour; then, weigh PS with a mass fraction of 8%, dissolve it in a mixed solvent of NMP and DMF with a mass ratio of 2:8, and place it under magnetic stirring On the device, control the temperature at 25°C, heat until the solution becomes a transparent, uniform, and bubble-free electrospinning solution, and cool for 30 minutes. Before injecting the electrospinning liquid, the needle of the syringe was cut into a round end and a flat mouth, and the spinning liquid in the syringe was approximately 4ml (the film thickness was controlled at about 45 μm). Put the aluminum foil paper on the glass plate as the receiving screen, adjust the spinning voltage and the distance between the bottom of the needle tube and the receiving glass plate, and pay attention to controlling the flow rate of the syringe pump, and start spinni...

Embodiment 3

[0100] Preparation of polymethyl methacrylate (PMMA) membrane template:

[0101] First, turn on the high-voltage power supply of the electrospinning device to preheat for half an hour; then, weigh PMMA with a mass fraction of 10%, dissolve it in a mixed solvent of DMF and acetone with a mass ratio of 3:7, and place it under magnetic stirring On the device, control the temperature at 30°C, heat until the solution becomes a transparent, uniform, and bubble-free electrospinning solution, and cool for 30 minutes. Before injecting the electrospinning solution, cut the needle of the syringe into a round end and a flat mouth, and the spinning solution in the syringe is about 3ml (control the film thickness at about 40 μm). Put the aluminum foil paper on the glass plate as the receiving screen, adjust the spinning voltage and the distance between the bottom of the needle tube and the receiving glass plate, and pay attention to controlling the flow rate of the syringe pump, and start s...

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Abstract

The invention provides a nanometer metal hollow fiber felt current collector and a preparation method thereof, a lithium ion battery pole piece and a lithium ion battery. The preparation method of the nano metal hollow fiber felt current collector: the nanofiber felt template is obtained by polymer spinning, and then the nanofiber felt template is activated and sensitized and then plated to obtain a nanofiber felt with a metal film; The nano-fiber felt with the metal film is soaked in a solvent to obtain the nano-metal hollow fiber felt current collector. The nano metal hollow fiber felt current collector is prepared by the preparation method. The lithium ion battery pole piece is made by using the nanometer metal hollow fiber felt current collector. A lithium ion battery includes the lithium ion battery pole piece. The nano-metal hollow fiber mat current collector provided by the application has high chemical stability and excellent electrical properties.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a nanometer metal hollow fiber felt current collector and a preparation method thereof, a lithium ion battery pole piece and a lithium ion battery. Background technique [0002] The components of lithium-ion batteries, in addition to positive electrode materials, negative electrode materials, separators and electrolytes, current collectors used to store positive and negative electrode materials are also important components of lithium-ion batteries. The function of the current collector is mainly to carry the active material and collect the current generated by the active material of the battery to form a larger current output. In lithium-ion batteries, it mainly refers to metal foil, such as copper foil and aluminum foil, and generally refers to tabs. An ideal current collector for lithium-ion batteries should meet the following conditions: (1) high electrical conductivity;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/13H01M10/0525
CPCH01M4/13H01M4/667H01M10/0525Y02E60/10
Inventor 刘双祎邓多刘争伟唐泽勋商士波张瑛
Owner 湖南桑瑞新材料有限公司
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