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Ion battery electrode plate and preparation method thereof, device for preparing ion battery electrode plate and ion battery

An ion battery and electrode sheet technology, which is applied to battery electrodes, non-aqueous electrolyte battery electrodes, lithium batteries, etc., can solve the problems such as the inability to exert the conductive advantages of carbon-based low-dimensional materials and the poor conductivity of the positive and negative electrode sheets of the battery. Achieve the effect of reducing material cost, reducing battery internal resistance, and reducing battery internal resistance

Pending Publication Date: 2022-04-26
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when using traditional mixing processes, such as ball milling, stirring, ultrasonic, etc., when carbon-based low-dimensional conductive materials are added to electrode active materials, the problem of random orientation of carbon-based low-dimensional conductive materials cannot be avoided, so it is far from possible. Taking advantage of the conductive advantages of carbon-based low-dimensional materials, the conductivity of the positive and negative electrodes of the battery is still poor

Method used

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  • Ion battery electrode plate and preparation method thereof, device for preparing ion battery electrode plate and ion battery
  • Ion battery electrode plate and preparation method thereof, device for preparing ion battery electrode plate and ion battery
  • Ion battery electrode plate and preparation method thereof, device for preparing ion battery electrode plate and ion battery

Examples

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preparation example Construction

[0063] The present invention provides a method for preparing battery electrode sheets described in the above technical solution, comprising the following steps:

[0064] Spray the conductive agent slurry treated by ultrasonic atomization on the surface of the substrate to form a wet film of the conductive agent slurry. The thickness of the wet film of the conductive agent slurry is ≤5 μm. After the diluent is volatilized, the conductive agent is oriented and oriented during the volatilization process to form an oriented conductive agent layer;

[0065] Or use in-situ vapor deposition to deposit a layer of directional conductive agent on the surface of the substrate;

[0066] The thickness of the single-layer directional conductive agent layer is less than 5 μm;

[0067] The substrate includes a separable substrate, a positive electrode material layer or a negative electrode material layer;

[0068] When the number of layers of the conductive agent layer>1 layer, repeat the p...

Embodiment 1

[0167] Mix lithium iron phosphate and PVDF evenly to obtain a mixture, and then mix it with N-methylpyrrolidone for 2 hours to obtain a positive electrode material slurry, wherein the mass percentage of lithium iron phosphate is 30%, and the mass ratio of lithium iron phosphate to PVDF is 8 :1;

[0168] Graphene nanosheets with a particle size of 3-10nm and N-methylpyrrolidone are mixed in a mass ratio of 2:8 and then mixed with an ultrasonic diffuser to obtain a conductive agent compound;

[0169] use figure 2 The shown device absorbs the PET release film on the coating machine platform 3;

[0170] Put the cathode material slurry into the electrode material bin 2, coat it on the PET release film, and coat it into a film with a thickness of 100 microns;

[0171] Dry with an infrared dryer 5-1 to volatilize and release N-methylpyrrolidone;

[0172] On the platform 3 of the coating machine, use a pressure roller 6 to roll, and the compression amount is 10% to 30%;

[0173] ...

Embodiment 2

[0176] Mix graphite and PVDF evenly to obtain a mixture, and then mix with N-methylpyrrolidone for 2 hours to obtain a negative electrode material slurry, wherein the mass percentage of lithium iron phosphate is 30%, and the mass ratio of lithium iron phosphate to PVDF is 8:1 ;

[0177] The preparation method of the negative electrode sheet is the same as that of Example 1.

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Abstract

The invention relates to the technical field of ion batteries, in particular to an ion battery electrode plate and a preparation method thereof, a device for preparing the ion battery electrode plate and an ion battery. The battery electrode plate provided by the invention comprises a plurality of directional conductive agent layers, the thickness of the single directional conductive agent layer is smaller than 5 microns, the directional conductive agent layer comprises a one-dimensional conductive agent and / or a two-dimensional conductive agent, the length direction of the one-dimensional conductive agent is parallel to the plane where the conductive agent is located, and the plane tangential direction of the two-dimensional conductive agent is parallel to the normal direction of the electrode plate. The battery electrode plate provided by the invention can give full play to the high conductivity advantage of the conductive material, and can greatly reduce the internal resistance of the battery and improve the rate capability of the battery when being used as an ion battery electrode plate.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to an ion battery electrode sheet and a preparation method thereof, a device for preparing an ion battery electrode sheet, and an ion battery. Background technique [0002] With the global trend of energy saving, emission reduction and electrification, the research and application of battery energy storage technology are getting more and more attention. In recent years, it has become more and more difficult to further increase the energy density and power density of batteries under the premise of safety due to the limitation of battery positive and negative electrode materials. For commonly used lithium-ion batteries, the positive electrode material usually has poor conductivity. Under high charge and discharge rates, the electrode generates a lot of heat, which wastes energy and damages battery life. Under large charging loads, the electrode polarization caused by the in...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/139H01M4/62H01M10/052
CPCH01M4/13H01M4/139H01M4/624H01M10/052Y02E60/10
Inventor 王云王亚超
Owner TAIZHOU UNIV
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