Removable binder for hot-pressed solid-state electrolyte separators
AssigneeGM Global Technology Operations LLC
InventorsHernando Gonzalez Malabet, Thomas A. Yersak, Aaron Ketchum
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Abstract
A removable binder system to expand application of hot-pressed solid-state electrolyte separator technology is provided, specifically a solid-state electrolyte (SSE) for an electrochemical cell, a method for producing an electrochemical cell and an electrode composite film for an electrochemical cell in order to provide separators that work well with binders such that removing the binders does not affect the electro-molecular properties of the separators.
Claims20
A solid-state electrolyte (SSE) for an electrochemical cell, the SSE comprising:
- a separator film;
- and
- a 1-10 wt. % removable binder holding the film together,
- wherein the SSE is a glass formed by a glass forming system and has a crystallization activation energy greater than 200 kJ/mol and a glass transition temperature (Tg) greater than 200° C.
A method for producing an electrochemical cell, the method comprising:
- providing a solid-state electrolyte (SSE), the SSE a glass formed by a glass forming system and has a crystallization activation energy greater than 200 kJ/mol and a glass transition temperature (Tg) greater than 200° C. and comprising a separator film and a 1-10 wt. % removable binder holding the film together, the film fabricated by a hot-pressing process;
- and
- removing the binder from the film prior to the hot-pressing process by utilizing a pre-heat treatment.
An electrode composite film for an electrochemical cell, the electrode composite film comprising:
- active material;
- a conductive additive;
- a solid-state electrolyte (SSE);
- reinforcing fiber;
- and
- a removable binder,
- wherein electrode composite film is an anode or a cathode.
Dependencies are inferred from the claim text.