Nanometal 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 that cannot fully reflect the unique properties of materials, limit the application of lithium-ion batteries, and have a large impact on irreversible properties. Good industrial application prospects, little impact of irreversible properties, good reproducible effect

Active Publication Date: 2020-04-17
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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  • Nanometal hollow fiber felt current collector and preparation method thereof, lithium ion battery pole piece and lithium ion battery
  • Nanometal hollow fiber felt current collector and preparation method thereof, lithium ion battery pole piece and lithium ion battery
  • Nanometal 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 nanometal 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 nanometal hollow fiber felt current collector comprises the following steps: spinning a polymer to obtain a nano-fiber felt template, activating and sensitizing the nano-fiber felt template, and performingplating to obtain a nano-fiber felt with a metal film; and soaking the nano-fiber felt with the metal film in a solvent to obtain the nano-metal hollow fiber felt current collector. The nanometal hollow fiber felt current collector is prepared by using the preparation method. The lithium ion battery pole piece is prepared by using the nano metal hollow fiber felt current collector. The lithium ion battery comprises the lithium ion battery pole piece. The nano-metal hollow fiber felt current collector provided by the invention is high in chemical stability and excellent in electrical property.

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 Applications(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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