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A kind of high-conductivity paste, preparation method and application thereof, lithium battery separator and lithium battery

A lithium battery separator, high conductivity technology, applied in the direction of lithium batteries, non-aqueous electrolyte batteries, battery pack components, etc., can solve the problems of poor liquid retention, low liquid absorption rate of the diaphragm, low ion conductivity, etc., to improve the battery life Hydraulic power, improved ionic conductivity, and good affinity

Active Publication Date: 2022-03-08
HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of high-conductivity slurry for the diaphragm liquid absorption rate of the polyolefin material existing in the prior art, poor liquid retention, and low ion conductivity, and the tannic acid in the slurry As a binder, after coating on the base film of polyolefin material, it can promote the transmission of lithium ions

Method used

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  • A kind of high-conductivity paste, preparation method and application thereof, lithium battery separator and lithium battery
  • A kind of high-conductivity paste, preparation method and application thereof, lithium battery separator and lithium battery
  • A kind of high-conductivity paste, preparation method and application thereof, lithium battery separator and lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] High electrical conductive slurry, including 30kg water, 10kg alcohol, 0.4kg dispersant (acrylamide), 0.6kg tannic acid, 1.2kg lithium polymer (ammonium polyphosphate) and 0.2kg pore additive (PE Diol).

[0037] The high electrical biller is prepared by the following method:

[0038] Step 1, mix the water and alcohol to give a solvent, then add a dispersant, stirred in a stirrer for 10 min to mix well to obtain a mixed solution;

[0039] Step 2, mix the tannic acid, the lithium polymer, and the aperture additive, resulting in a mixed solid, adding the mixing solution in the mixer of step 1, continues to stir 30 min to obtain a mixing system;

[0040] Step 3, remove the mixing system obtained by the step 2 to the introduction sander sand mill sand mill, resulting in the high electrical scale.

[0041] A lithium battery diaphragm comprising a polyolefin base film and a coating coated on one side of the polyolefin base film, wherein the polyolefin base film has a thickness of ...

Embodiment 2

[0046] High electrical conductive slurry, including 55kg water, 10kg alcohol, 0.35kg dispersant (polyvinylpyrrolidone), 1.5kg tannic acid, 3.7kg lithium polymer (polyacrylate) and 0.4 kg of pore additive (polyethylene) Pyrrolidone).

[0047] The high electrical biller is prepared by the following method:

[0048] Step 1, mix the water and alcohol to give a solvent, then add a dispersant, stirred in a stirrer for 10 min to mix well to obtain a mixed solution;

[0049] Step 2, mix the tannic acid, the lithium polymer, and the aperture additive, resulting in a mixed solid, adding a mixed solution in the mixer of step 1, continues to stir 40min, resulting in a mixing system;

[0050] Step 3, remove the mixing system obtained by the step 2 to the introduction of sand mill sand mill, resulting in the high electrical biller.

[0051] A lithium battery diaphragm comprising a polyolefin base film and a coating coated on one side of the polyolefin base, wherein the polyolefin base film has a ...

Embodiment 3

[0056] High electrical conductive slurry, including 80kg water, 10kg alcohol, 0.89kg dispersant (poly quarantine salt), 5.7kg tannic acid, 11.4kg lithium polymer (polypropylene ammonium salt) and 0.8kg pore additive (Sodium nitrate).

[0057] The high electrical biller is prepared by the following method:

[0058] Step 1, mix the water and alcohol to give a solvent, then add a dispersant, stirred in a stirrer for 10 min to mix well to obtain a mixed solution;

[0059] Step 2, mix the tannic acid, the lithium polymer, and the aperture additive, resulting in a mixed solid, adding a mixed solution in the mixer of step 1, continued to stir 60 min to obtain a mixed system;

[0060] Step 3, remove the mixing system obtained by the step 2 to the introduction sander sand mill sand mill, resulting in the high electrical scale.

[0061] A lithium battery diaphragm comprising a polyolefin base film and a coating coated on one side of the polyolefin substrate, wherein the polyolefin base film...

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Abstract

The invention discloses a high conductivity slurry and its preparation method and application, a lithium battery separator and a lithium battery. The high conductivity slurry includes a solvent, a solute and a dispersant, wherein: the solvent has a mass ratio of (1 to 9 ): A mixture of water and alcohol of 1, the solutes include tannins, lithium-conducting polymers and pore-forming additives with a mass ratio of (5~50): (10~90): (0.1~8), so The mass of the dispersant is 2-10% of the mass of the solute, and the mass of the solute is 1%-25% of the mass of the solvent. The lithium battery separator coated with the high conductivity slurry has good ion conductivity, and the lithium battery equipped with the lithium battery separator has good cycle performance and rate performance.

Description

Technical field [0001] The present invention relates to the technical field of lithium batteries, and in particular to a high conductivity slurry and its preparation method and application, a lithium battery separator and a lithium battery. Background technique [0002] Lithium batteries are widely used due to their high energy density, no memory effect, long cycle life, and environmental friendliness. They have become one of the main energy sources for modern communication products. In recent years, with the promotion of new energy vehicles, their applications in the field of power batteries are also developing rapidly. The separator plays an important role in blocking the electronic conductivity of the positive and negative electrodes in the battery, allowing the free passage of electrolyte ions to achieve ion conduction. It is an important decisive factor in the battery's cycle capacity and safety performance, and is one of the most critical parts of the lithium battery. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/449H01M50/417H01M50/403H01M10/052
CPCH01M10/052H01M50/403H01M50/449H01M50/411Y02E60/10
Inventor 袁海朝徐锋苏柳苏碧海
Owner HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD
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