Lamination process for PTFE-based electrode films on current collectors
AssigneeGM Global Technology Operations LLC
InventorsMing Wang, Mary Gilliam, Xiaowei Yu, Ryan Curtis Sekol, Graham Garner
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Abstract
A method for fabricating an electrode for a battery cell includes supplying a first electrode film from a first roll. The first electrode film comprises an active material for exchanging lithium ions and a binder. The method includes treating a first side of the first electrode film using a first plasma treatment system; supplying a current collector, and heating and pressing the first side of the first electrode film to a first side of the current collector together using first and second rollers.
Claims18
A method for fabricating an electrode for a battery cell, comprising:
- supplying a first electrode film from a first roll,
- wherein the first electrode film comprises an active material for exchanging lithium ions and a binder;
- treating a first side of the first electrode film using a first plasma treatment system;
- supplying a current collector;
- heating and pressing the first side of the first electrode film to a first side of the current collector together using first and second rollers;
- supplying a second electrode film from a second roll;
- and
- treating a first side of the second electrode film using a second plasma treatment system,
- wherein the heating and pressing comprises heating and pressing the first side of the first electrode film to the first side of the current collector and the first side of the second electrode film to a second side of the current collector using the first and second rollers.
A method for fabricating an electrode for a battery cell, comprising:
- supplying a first electrode film from a first roll,
- wherein the first electrode film comprises an active material for exchanging lithium ions and a binder comprising polytetrafluoroethylene (PTFE);
- treating a first side of the first electrode film using a first plasma treatment system;
- supplying a current collector;
- supplying a second electrode film from a second roll;
- treating a first side of the second electrode film using a second plasma treatment system;
- and
- heating and pressing the first side of the first electrode film to the first side of the current collector and the first side of the second electrode film to a second side of the current collector using a first roller and a second roller,
- wherein the first roller and the second roller are heated to a temperature in a range from 80° C. to 260° C., and
- wherein the first roller and the second roller apply pressure to the first electrode film, the second electrode film, and the current collector in a range from 1 to 20 MPa.
Dependencies are inferred from the claim text.