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Boehmite/aluminum oxide composite lithium ion battery coating electrode piece

An ion battery and alumina technology, which is applied in battery electrodes, non-aqueous electrolyte battery electrodes, electrode manufacturing, etc., can solve problems such as lithium dendrite puncture, battery fire, explosion, etc., and achieve cycle life improvement, cost reduction, and safety good performance

Active Publication Date: 2019-10-25
江西力能新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing lithium batteries are generally coated with a coating on the separator, but the lithium dendrites generated during the use of the lithium battery will pierce the separator, resulting in a short circuit, causing unsafe phenomena such as fire, explosion, and scrapping of the battery

Method used

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  • Boehmite/aluminum oxide composite lithium ion battery coating electrode piece
  • Boehmite/aluminum oxide composite lithium ion battery coating electrode piece
  • Boehmite/aluminum oxide composite lithium ion battery coating electrode piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of boehmite / alumina composite lithium-ion battery coated pole piece, on the surface of the pole piece of lithium battery coating a layer of boehmite / alumina slurry, described boehmite / alumina slurry consists of the following Made of raw materials in parts by weight: 0.5-1.3 parts of surfactant, 0.5-1.0 parts of thickener, 5.0-10.0 parts of binder, 0.1-0.5 parts of dispersant, 20.0-50.0 parts of boehmite / alumina mixture , 2.0-6.0 parts of defoamer, 30.0-70.0 parts of solvent.

[0024] The mass ratio of the boehmite to alumina is 1:4.

[0025] The particle diameters of the boehmite and alumina are both 200nm, and the alumina is α-Al 2 o 3 .

[0026] The surfactant is sodium dodecylbenzenesulfonate.

[0027] The thickener is sodium carboxymethylcellulose.

[0028] The binder is polyvinyl alcohol (PVA).

[0029] The defoamer is C 2 h 5 Oh.

[0030] A method for preparing a boehmite / alumina composite lithium-ion battery coated pole piece as described above, c...

Embodiment 2

[0037] A kind of boehmite / alumina composite lithium-ion battery coated pole piece, on the surface of the pole piece of lithium battery coating a layer of boehmite / alumina slurry, described boehmite / alumina slurry consists of the following Made from raw materials in parts by weight: 0.7 parts of surfactant, 0.8 part of thickener, 4.0 parts of binder, 0.3 part of dispersant, 40.0 parts of boehmite / alumina mixture, 4 parts of defoamer, 50.2 parts of solvent .

[0038] The mass ratio of the boehmite to alumina is 1:2.

[0039] The particle diameters of the boehmite and alumina are both 400nm, and the alumina is α-Al 2 o 3 .

[0040] The surfactant is C 11 h 23 CON(CH 2 CH 2 Oh) 2 (coconut oil fatty acid diethanolamide).

[0041] The thickener is xanthan gum.

[0042] The binder is selected from gum arabic.

[0043] The defoamer is polyglycerol ether.

[0044] A method for preparing a boehmite / alumina composite lithium-ion battery coated pole piece as described above, c...

Embodiment 3

[0051]A kind of boehmite / alumina composite lithium-ion battery coated pole piece, on the surface of the pole piece of lithium battery coating a layer of boehmite / alumina slurry, described boehmite / alumina slurry consists of the following Made of raw materials in mass percent: 1.3 parts of surfactant, 1.0 part of thickener, 10.0 parts of binder, 0.5 part of dispersant, 50.0 parts of boehmite / alumina mixture, 6.0 parts of defoamer, and 31.2 parts of solvent.

[0052] The mass ratio of the boehmite to alumina is 3:4.

[0053] The particle diameters of the boehmite and alumina are both 600nm, and the alumina is β-alumina.

[0054] Described tensio-active agent is (C 2 h 4 O) n C 16 h 34 O (polyoxyethylene ether).

[0055] The thickener is gelatin.

[0056] The binder is a silane coupling agent, specifically vinyltriethoxysilane.

[0057] The defoamer is a mixture of ethanol and glycerol ether with a mass ratio of 1:3.

[0058] A method for preparing a boehmite / alumina com...

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Abstract

The invention discloses a boehmite / aluminum oxide composite lithium ion battery coating electrode piece. Boehmite / aluminum oxide slurry is prepared from the following raw materials in percentage by mass: 0.5-1.3 parts of a surfactant, 0.5-1.0 parts of a thickening agent, 5.0-10.0 parts of a binder, 0.1-0.5 parts of a dispersing agent, 20.0-50.0 parts of a boehmite / alumina mixture, 2.0-6.0 parts ofa defoamer and 30.0-70.0 parts of a solvent. The invention further discloses a preparation method of the boehmite / aluminum oxide composite lithium ion battery coating electrode piece. The boehmite islow in price, the cost is greatly reduced, and the market competitive advantage is greatly improved; compared with a coated diaphragm, the coated electrode piece can save more space, and the energy density of batteries with the same volume is high.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to a boehmite / alumina composite lithium-ion battery coated pole piece. Background technique [0002] Since the promotion of commercialization, lithium-ion batteries have been widely used in various portable batteries due to their advantages such as high energy density, high working voltage, long cycle life, no memory effect, green environmental protection, and flexible design of size and shape according to actual needs. Power supplies for consumer electronics. The new energy vehicle market has huge prospects. As an important chemical power source, lithium-ion batteries are widely used in mobile communication equipment, electric tools, electric bicycles, etc. The demand for lithium-ion batteries and related supporting industries is increasing. The main components include pole piece, diaphragm and electrolyte. [0003] Existing lithium batteries are generally coated with a coatin...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/04H01M4/139H01M4/62H01M10/0525H01M10/42
CPCH01M4/0404H01M4/0471H01M4/13H01M4/139H01M4/628H01M10/0525H01M10/4235Y02E60/10
Inventor 侯伟侯民郭农庆
Owner 江西力能新能源科技有限公司
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