Lithium-ion battery binder and solvent
AssigneeFord Global Technologies, LLC
InventorsBenjamin Jason EMLEY, Cong LIU, Sarthak VAIDYA
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Abstract
A method for forming an electrode for a lithium-ion battery is presented. The method involves blending a polymer binder, cathode active material particles, and a solvent to create an initial dispersion where the polymer binder remains undissolved. The dispersion is then subjected to wet-jet milling at a pressure and duration sufficient to physically and chemically attach the polymer binder to the surfaces of the cathode active material particles, resulting in a stable dispersion resistant to sedimentation. The stable dispersion is subsequently deposited onto a current collector to form the electrode.
Claims17
A method of forming an electrode for a lithium-ion battery comprising:
- blending a polymer binder, cathode active material particles, and a solvent to form an initial dispersion in which the polymer binder is not dissolved;
- wet-jet milling the initial dispersion at a pressure and duration to physically and chemically attach the polymer binder onto surfaces of the cathode active material particles, forming a stable dispersion resistant to sedimentation;
- and
- depositing the stable dispersion onto a current collector to form an electrode.
A method of forming a lithium-ion battery electrode comprising:
- mixing a non-soluble polymer binder, cathode active material particles, and a non-theta solvent to form an initial mixture;
- wet-jet milling the initial mixture to form a stable dispersion in which the polymer binder adheres to sterically hindered cathode active material particles;
- and
- adjusting a parameter of the wet-jet milling to generate a predetermined polymer binder loading and form an electrode.
A lithium-ion battery comprising:
- an anode;
- a cathode, including a stable dispersion of cathode active material particles with surfaces having physically adhered polymer binder molecules in a non-theta solvent to maintain the polymer binder molecules in an undissolved state;
- and
- a separator between the anode and cathode.
Dependencies are inferred from the claim text.