Methods and compositions for lithium ion batteries

A method of manufacturing a solid-state lithium-ion battery comprising:

• a. dissolving a solid-state electrolyte into a first organic solvent with a boiling point less than 210 degrees Celsius to form an electrolyte solution;
• b. casting the electrolyte solution on a non-metallic porous membrane and the first organic solvent is evaporated and a solid state electrolyte layer is formed;
• c. dispersing cathode active material and carbon into an electrolyte solution prepared in claim 18a to form a cathode slurry, wherein the cathode slurry is cast on an aluminum substrate and the organic solvent is evaporated;
• d. dispersing anode active material and carbon into an electrolyte solution prepared in 18a to form anode slurry, wherein the anode slurry is cast on an copper substrate and the organic solvent is evaporated;
• and
• e. stacking together the cathode layer, the electrolyte layer, and the anode layer by laminating or pressing, wherein the battery manufacturing is carried out at temperatures below 300 degrees Celsius.

A method of manufacturing a solid-state lithium-ion battery comprising:

• a. dissolving a solid-state electrolyte into an organic solvent with a boiling point less than 210 degrees Celsius to form an electrolyte solution;
• b. dispersing cathode active material and carbon into an electrolyte solution containing dissolved solid state electrolyte and an organic solvent with a boiling point less than 210 degrees Celsius to form a cathode slurry, wherein the cathode slurry is cast on an aluminum substrate and the organic solvent is evaporated to form a solid state cathode;
• c. casting the electrolyte solution prepared in claim 20a on the surface of the cathode layer and the organic solvent is evaporated to form a solid state electrolyte layer;
• d. dispersing/mixing anode active material and carbon into an electrolyte solution containing dissolved solid state electrolyte and an organic solvent with a boiling point less than 210 degrees Celsius to form a anode slurry, wherein the anode slurry is cast on the surface of the solid state electrolyte layer prepared in claim 20c. The organic solvent is evaporated to form a solid state anode layer;
• and
• e. adding a copper foil on the top of anode layer as the anode current collector and laminating the stack together, wherein the battery manufacturing is carried out at temperatures below 300 degrees Celsius.

A method of manufacturing a solid-state lithium-ion battery comprising:

• a. preparing a molten-state electrolyte layer slurry, a cathode slurry containing the electrolyte, a cathode active material and carbon, and an anode slurry containing the electrolyte, an anode active material and carbon;
• b. stacking the layers together on a substrate;
• and
• c. rolling the stacked layers,
• wherein the battery manufacturing is carried out at temperatures below 300 degrees Celsius.