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A nickel-cobalt-manganese/nickel-cobalt-aluminate lithium battery and its functional diaphragm and production process for the diaphragm

A nickel-cobalt lithium aluminate and functional technology, applied in the field of battery diaphragm, can solve the problems of battery cycle performance impact and inability to effectively inhibit dissolution at the same time, so as to improve cycle performance, improve production efficiency and electrical performance, and improve liquid absorption efficiency effect

Active Publication Date: 2021-08-24
安徽金力新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the surface coating of the positive electrode material cannot effectively inhibit the dissolution of nickel, cobalt, manganese, and aluminum metal elements in the ternary battery of nickel-cobalt lithium manganate and nickel-cobalt lithium aluminate battery, so the cycle performance of the battery will still be affected. influences

Method used

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  • A nickel-cobalt-manganese/nickel-cobalt-aluminate lithium battery and its functional diaphragm and production process for the diaphragm
  • A nickel-cobalt-manganese/nickel-cobalt-aluminate lithium battery and its functional diaphragm and production process for the diaphragm
  • A nickel-cobalt-manganese/nickel-cobalt-aluminate lithium battery and its functional diaphragm and production process for the diaphragm

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Effect test

Embodiment 1

[0035] A functional separator for a nickel-cobalt-manganese / nickel-cobalt-aluminate lithium battery in this embodiment comprises a porous film substrate and a functional coating coated on the surface of the substrate, the coating of the functional coating includes a filler, Adhesives, thickeners, dispersants and stabilizers, wherein the stabilizer is triethylenetetraminehexaacetic acid, its addition is 0.5% of the total weight of the functional coating, and the filler is aluminum oxide, Its addition is 84% ​​of the total weight of the functional coating, and the adhesive is styrene-butadiene latex, and its addition is 10% of the total weight of the functional coating. The thickener is sodium carboxymethylcellulose, and its addition is 5% of the total weight of the functional coating; the dispersant is polyethylene glycol, and its addition is 0.5% of the total weight of the functional coating . A nickel-cobalt-lithium-manganese-oxide battery in this embodiment includes the abo...

Embodiment 2

[0038] A functional diaphragm for a nickel-cobalt-manganese / nickel-cobalt-aluminate lithium battery of the present embodiment comprises a porous film substrate (its structure is as follows: figure 1 shown) and functional coatings coated on the surface of the substrate (such as figure 2 shown), the porous membrane substrate is selected from polyethylene (its structure is as follows figure 1 Shown), its thickness: 5μm; porosity: 30%; tortuosity: 12; pore diameter: 10 ~ 50nm. The coating of described functional coating comprises filler, bonding agent, thickener, dispersant and stabilizer, and wherein said stabilizer is diethylene triamine pentaacetic acid, and the content of stabilizer is functional coating gross weight 20% of. The filler is silicon oxide, and its addition is 40% of the total weight of the functional coating; the adhesive is phenylacrylic acid, and its addition is 20% of the total weight of the functional coating. The thickener is polyethylene oxide, and the ...

Embodiment 3

[0042] A functional separator for a nickel-cobalt-manganese / nickel-cobalt-aluminate lithium battery in this embodiment includes a porous membrane base material and a functional coating coated on the surface of the base material, and the porous membrane base material is selected from polyparaphenylene Ethylene glycol diformate, thickness: 70μm; porosity: 80%; air permeability: 100s / 100cc; tortuosity: 50; pore diameter: 400-500nm. The coating of the functional coating includes a filler, an adhesive, a thickener, a dispersant and a stabilizer, wherein the stabilizer is 1,3-diamine-2-hydroxypropane-N,N,N' , N'-tetraacetic acid, the content of the stabilizer is 0.1% of the total weight of the functional coating. The filler is clay, and its addition is 95% of the total weight of the functional coating; the adhesive is a combination of polyacrylamide and urethane, and its addition is the total weight of the functional coating 3%. The thickener is a combination of polyethylene oxide...

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Abstract

The invention discloses a nickel-cobalt-manganese / nickel-cobalt-aluminate lithium battery, a functional separator and a production process for the separator, and belongs to the technical field of battery separators. The functional separator for nickel-cobalt-manganese / nickel-cobalt-aluminate lithium battery of the present invention comprises a porous film substrate and a functional coating coated on the surface of the substrate, and the coating of the functional coating includes a filler and an adhesive , thickener, dispersant and stabilizer, wherein the stabilizer is selected from triethylenetetraaminehexaacetic acid, diethylenetriaminepentaacetic acid, 1,3-diamine-2-hydroxypropane-N, N, N' , one or more of N′-tetraacetic acid, N,N-bis(2-hydroxyphenyl)ethylenediamine-N,N-diacetic acid hydrochloride, dihydroxyethylglycine combination. By adopting the technical solution of the present invention, the shuttle of nickel, cobalt, manganese, and aluminum metal elements can be effectively suppressed, thereby improving the cycle performance of nickel-cobalt lithium manganate and nickel-cobalt lithium aluminate ternary batteries.

Description

technical field [0001] The invention belongs to the technical field of battery separators, and more specifically relates to a nickel-cobalt-manganese / nickel-cobalt-aluminate lithium battery, a functional separator and a production process for the separator. Background technique [0002] At present, energy shortage has become a worldwide problem. In order to alleviate the shortage of oil resources, the development of new energy vehicles that replace traditional fuel vehicles has reached an urgent point. Lithium-ion batteries have become the main solution for mobile energy due to their outstanding advantages such as high energy density, low self-discharge, and no memory effect. With the improvement of the mileage, fast charging technology and safety performance of electric vehicles in the market, lithium-ion batteries equipped with electric vehicles are required to have higher energy density, large rate performance, high safety performance and long life. service life. The te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/446H01M50/414H01M50/417H01M50/423H01M50/449H01M50/403H01M10/0525H01M50/411H01M50/489H01M50/491
CPCH01M10/0525H01M2220/20H01M50/403H01M50/446H01M50/449Y02E60/10
Inventor 邓豪王杰
Owner 安徽金力新能源有限公司
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