Lithium-ion battery negative pole piece, and preparation method and application thereof
A technology of lithium ion battery and negative electrode sheet, which is applied to battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of complicated processes, unilateral lifting of the diaphragm, and easy blocking of the pores of the diaphragm, and achieves simple process and improved air permeability. performance, improve stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0032] Preparation of positive electrode sheet:
[0033] Lithium cobaltate (positive electrode active material), conductive agent superconducting carbon (Super-P), and binder polyvinylidene fluoride (PVDF) are uniformly mixed at a mass ratio of 96:2.0:2.0 to make a lithium-ion battery with a certain viscosity Positive electrode slurry, the slurry is coated on the aluminum foil of the current collector, after drying at 85°C, it is cold-pressed and cut into a suitable size; then the tabs are welded to make the positive electrode sheet of the lithium-ion battery.
[0034] Preparation of negative electrode sheet:
[0035] Make slurry with graphite and conductive agent superconducting carbon (Super-P), thickener sodium carboxymethyl cellulose (CMC), and binder styrene-butadiene rubber (SBR) at a mass ratio of 96.5:1.0:1.0:1.5 , coated on the copper foil of the current collector, dried at 85°C and cut into a suitable size; welded tabs to make lithium-ion battery negative plates.
...
Embodiment 2
[0043] The positive electrode sheet, negative electrode sheet, separator, non-aqueous electrolyte, and cell molding are the same as the comparative example, and only the negative electrode sheet coating is prepared in the following manner:
[0044] Add 0.6 parts by mass of dimethyl carbonate (plasticizer), 6 parts by mass of polyvinylidene fluoride (PVDF) powder and 63 parts by mass of deionized water to a double planetary mixer and stir for 1 hour; add 0.4 parts by mass of carboxymethyl Base cellulose, mixed at 45°C for 0.5 hours; then added 30 parts by mass of calcium carbonate (average particle size: 2 μm), and stirred at room temperature for 2 hours to obtain an organic / inorganic composite slurry.
[0045] The surface of the negative electrode sheet was coated by screen printing, and dried in a 50-degree oven after coating, and the thickness of the coating after drying was 12um.
Embodiment 3
[0047] The positive electrode sheet, negative electrode sheet, separator, non-aqueous electrolyte, and cell molding are the same as the comparative example, and only the negative electrode sheet coating is prepared in the following manner:
[0048] Add 0.4 parts by mass of methyl isobutyl ketone, 4 parts by mass of polyacrylonitrile powder and 60 parts by mass of deionized water into a double planetary mixer and stir for 1 hour; add 0.2 parts by mass of polymethyl acrylate and mix at 45°C 0.5 hour; then add 20 parts by mass of calcium oxide (average particle size: 1 μm), and stir at room temperature for 2 hours to obtain an organic / inorganic composite slurry.
[0049] The surface of the negative electrode sheet was coated by screen printing, and dried in an oven at 50 degrees after coating, and the thickness of the coating after drying was 1um.
PUM
Property | Measurement | Unit |
---|---|---|
particle size | aaaaa | aaaaa |
viscosity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com