Electrode for secondary battery and fabrication method thereof
Provided is a fabrication method of an electrode for a secondary battery including coating an electrode slurry containing an electrode active material and a binder on a current collector; drying the current collector on which the electrode slurry is coated to form an electrode active material layer; and surface-treating the electrode active material layer formed on the current collector to remove a binder layer on a surface of the electrode active material layer.
1. A fabrication method of an electrode for a secondary battery, comprising the steps of:
(a) coating an electrode slurry containing an electrode active material and a binder on a current collector;
(b) drying the current collector on which the electrode slurry is coated to form an electrode active material layer; and
(c) surface-treating the electrode active material layer formed on the current collector to remove the binder from a surface of the electrode active material layer to form a surface layer from which the binder has been removed, wherein a thickness of the surface layer is 1 to 50 nm.
2. The fabrication method of an electrode for a secondary battery of claim 1 , wherein the surface treatment is dry surface treatment.
3. The fabrication method of an electrode for a secondary battery of claim 2 , wherein the surface treatment is performed by ultraviolet (UV)-ozone treatment.
4. The fabrication method of an electrode for a secondary battery of claim 3 , wherein the UV-ozone treatment is performed for 5 minutes to 60 minutes.
5. The fabrication method of an electrode for a secondary battery of claim 1 , wherein a content of the binder in the electrode active material layer after the surface treatment of step (c) is 97 wt % or more and less than 100 wt % of a content of the binder in the electrode active material layer before the surface treatment.
6. The fabrication method of an electrode for a secondary battery of claim 1 , wherein an adhesion of the electrode active material layer to the current collector is 0.2 N/cm or more.
7. A fabrication method of an electrode for a secondary battery, comprising the steps of:
(a) coating an electrode slurry containing an electrode active material and a binder on a current collector;
(b) drying the current collector on which the electrode slurry is coated to form an electrode active material layer; and
(c) surface-treating the electrode active material layer formed on the current collector to remove the binder from a surface of the electrode active material layer to form a surface layer from which the binder has been removed, wherein a content of the binder in the electrode active material layer after the surface treatment of step (c) is 97 wt % or more and less than 100 wt % of a content of the binder in the electrode active material layer before the surface treatment.
8. The fabrication method of an electrode for a secondary battery of claim 7 , wherein the surface treatment is performed by ultraviolet (UV)-ozone treatment.