Composite current collector, preparation method thereof and lithium battery pole piece
A current collector and lithium battery technology, which is applied to battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of large influence of welding effect on pole pieces and internal resistance of batteries, reducing battery energy density, increasing battery weight, etc. , to achieve the effect of improving physical and chemical properties, increasing electronic channels, and reducing battery weight
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0018] A method for preparing a composite current collector, comprising the steps of:
[0019] Take a porous polyethylene terephthalate film with a thickness of 3 μm, a micropore diameter of 25 μm, and a center-to-center spacing of 60 μm, and perform plasma cleaning to ensure that the surface has sufficient adhesion and is compatible with metals. The coating is tightly bonded;
[0020] Then adjust the vacuum to 10 -4 Pa, vacuum-evaporated metal aluminum on the surface of porous polyethylene terephthalate film to obtain an aluminum coating with a thickness of 1 μm;
[0021] Then, a layer of carbon black with a thickness of 1 μm was coated on the surface of the aluminum coating as a conductive coating to obtain a composite current collector.
Embodiment 2
[0031] A method for preparing a lithium battery positive electrode sheet, comprising the steps of: taking the composite current collector described in Example 1, and coating the positive electrode slurry containing the positive electrode active material on the surfaces of both sides of the composite current collector (compared to the composite current collector The thickness of the fluid, the thickness of the active material layer is relatively large, so after coating, the surface of the current collector is very flat), and then vacuum baked in an oven at 100 ° C for 12 hours, rolled, and then slitting, laser cutting or mold Cut the positive pole piece;
[0032] Wherein, the preparation method of the positive electrode slurry is: adding the positive electrode active material (the positive electrode active material is nickel cobalt lithium manganese oxide NCM622), the conductive agent CNTs, and the binder PVDF into the organic solvent NMP according to the weight ratio of 97.8:1....
PUM
Property | Measurement | Unit |
---|---|---|
thickness | aaaaa | aaaaa |
diameter | aaaaa | aaaaa |
thickness | 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