Cosolvent slurry system for solution processing of sulfide solid-state battery
AssigneeGM Global Technology Operations LLC
InventorsQili Su, Zhe Li, Yong Lu, Haijing Liu
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Abstract
A method of manufacturing an electrode-forming slurry includes mixing together an active material, an electrically conducting material and optionally a solid state electrolyte with a low-polar solvent. The low-polar solvent has a dipole moment of less than 4 and a boiling point greater than 100° C. to form a first slurry, where the active material is an anode active material or a cathode active material. A polymeric binder and an ether-based solvent are mixed to form second slurry. The first slurry and the second slurry are mixed to form the electrode-forming slurry.
Claims20
A method of manufacturing an electrode-forming slurry comprising:
- mixing together an active material, an electrically conducting material and optionally a solid state electrolyte with a low-polar solvent;
- where the low-polar solvent has a dipole moment of less than 4 and a boiling point greater than 100° C. to form a first slurry;
- where the active material is an anode active material or a cathode active material;
- mixing together a polymeric binder and an ether-based solvent to form a second slurry;
- and
- mixing the first slurry with the second slurry to form the electrode-forming slurry.
A method of manufacturing a solid state electrolyte for a solid state battery comprising:
- mixing a low-polar solvent and an ether-based solvent with a solid state electrolyte and a polymeric binder;
- where the low-polar solvent has a dipole moment of less than 4 and a boiling point of greater than 100° C.;
- where the solid state electrolyte is a pseudobinary sulfide, a pseudoternary sulfide, a pseudoquarternary sulfide, or a combination thereof.
A battery comprising:
- an anode current collector;
- an anode active layer disposed on the anode current collector;
- where the anode active layer comprises an anode active material;
- a polymeric binder and an electrically conducting additive;
- a cathode current collector;
- a cathode active layer disposed on the cathode current collector;
- where the cathode active layer comprises a cathode active material;
- a polymeric binder, a solid state electrolyte and an electrically conducting additive;
- and
- the solid state electrolyte;
- where the solid state electrolyte contacts both the anode active layer and the cathode active layer;
- and where the solid state electrolyte comprises a blend of the polymeric binder with a pseudobinary sulfide, a pseudoternary sulfide, a pseudoquarternary sulfide, or a combination thereof.
Dependencies are inferred from the claim text.