DENSIFICATION OF COMPRESSIBLE LAYERS DURING ELECTRODE LAMINATION
First Claim
1. A method of manufacturing an electrode product, the method comprising:
- providing a current collector comprising a first surface;
dry mixing dry active electrode material and dry binder;
providing a dry film of the dry mixed dry active electrode material and dry binder;
stacking the dry film and the current collector so that the first surface is in contact with the dry film; and
laminating the current collector and the dry film by pressing the current collector and the dry film to cause the dry film to densify and to adhere to the first surface, thereby obtaining a laminated electrode product;
wherein the step of laminating is performed so that the dry film is densified without spreading to an extent necessitating trimming of the dry film after laminating.
5 Assignments
0 Petitions
Accused Products
Abstract
A compressible and deformable layer is densified and laminated to a layer of a material that is relatively resistant to stretching. The densification and bonding take place in a single step. As used in fabrication of electrodes, for example, electrodes for double layer capacitors, a deformable and compressible active electrode film is manufactured from activated carbon, conductive carbon, and a polymer. The electrode film may be bonded directly to a collector. Alternatively, a collector may be coated with a wet adhesive layer. The adhesive layer is subsequently dried onto the foil. The dried adhesive and foil combination may be manufactured as a product for later sale or use, and may be stored as such on a storage roll or other storage device. The active electrode film is overlayed on the metal foil, and processed in a laminating device, such as a calendar. Lamination both densifies the active electrode film and bonds the film to the metal foil. Spreading of the active electrode film in the plane parallel to the plane of the metal foil is reduced or eliminated during lamination, because of the adhesion between the film and the foil.
69 Citations
17 Claims
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1. A method of manufacturing an electrode product, the method comprising:
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providing a current collector comprising a first surface; dry mixing dry active electrode material and dry binder; providing a dry film of the dry mixed dry active electrode material and dry binder; stacking the dry film and the current collector so that the first surface is in contact with the dry film; and laminating the current collector and the dry film by pressing the current collector and the dry film to cause the dry film to densify and to adhere to the first surface, thereby obtaining a laminated electrode product; wherein the step of laminating is performed so that the dry film is densified without spreading to an extent necessitating trimming of the dry film after laminating. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification