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US 11,380,899 B2Granted
Positive electrode, secondary battery including the same, and method for manufacturing using dry mixing at high shear force
AssigneeLG Energy Solution, Ltd.
InventorsChang Wan Koo, Sang Hoon Choy
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Abstract
The present invention relates to a method for preparing a positive electrode, comprising preparing a mixture by dry mixing a positive electrode active material, a dry conductive material, and a dry binder, applying high shear force to the mixture, disposing the mixture on a current collector, and rolling the current collector on which the mixture is disposed, wherein the dry conductive material is at least any one of a carbon nanotube and a carbon fiber, and the high 10 shear force is 100 N to 500 N.
Claims15
A positive electrode, comprising:
- a current collector;
- and
- a positive electrode active material layer disposed on the current collector, wherein the positive electrode active material layer comprises a positive electrode active material, a dry conductive material, and a dry binder, the positive electrode active material, the dry conductive material, and the dry binder have been subjected to a high shear force to form granules,
- the dry conductive material comprises at least one of a carbon nanotube and a carbon fiber,
- wherein the carbon nanotube has an average length from 5 μm to 80 μm,
- wherein the carbon fiber has an average length from 5 μm to 10 μm,
- the high shear force is 100 N to 500 N, and the positive electrode has a thickness deviation of 5 m or less.
4 more elements
A method for manufacturing a positive electrode, comprising:
- preparing a mixture by dry mixing a positive electrode active material, a dry conductive material, and a dry binder;
- applying high shear force to the mixture, wherein the positive electrode active material, the dry conductive material, and the dry binder are aggregated to form granules;
- disposing the mixture on a current collector;
- and
- rolling the current collector on which the mixture is disposed,
- wherein
- the dry conductive material is at least one of a carbon nanotube and a carbon fiber,
- wherein the carbon nanotube has an average length from 5 μm to 80 μm,
- wherein the carbon fiber has an average length from 5 μm to 10 μm, and
- the high shear force is 100 N to 500 N.
7 more elements
Dependencies are inferred from the claim text.