Removing residual water from lithium-based energy storage devices
AssigneeGM Global Technology Operations LLC
InventorsZhiqiang YU, Haijing LIU
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Abstract
A method involves contacting a material for a lithium-based energy storage device with a supercritical substance maintained at or above its critical point. A lithium-based energy storage device is also provided, in which at least one of the various component parts (battery separator, lithium salt, negative electrode, negative current collector, positive electrode, and positive current collector) is substantially free of residual water by contact with the supercritical substance maintained at or above its critical point.
Claims15
A method, comprising:
- contacting a material for a lithium-based energy storage device with a supercritical substance maintained at or above its critical point to remove water from the material.
A lithium-based energy storage device, comprising:
- an electrolyte maintained in a separator, the separator having two sides;
- a lithium salt dissolved in the electrolyte;
- a negative electrode disposed on one side of the separator;
- a negative current collector associated with the negative electrode;
- a positive electrode disposed on an opposite side of the separator;
- and
- a positive current collector associated with the positive electrode;
- wherein at least one of the separator, the lithium salt, the negative electrode, the negative current collector, the positive electrode, or the positive current collector is substantially free of residual water as a result of contact with a supercritical substance maintained at or above its critical point.
A method, comprising:
- contacting a material for a lithium-based battery or a lithium-ion capacitor with a supercritical substance maintained at or above its critical point to remove water from the material, the material including at least one of:
- an electrolyte maintained in a separator, the separator having two sides;
- a lithium salt dissolved in the electrolyte;
- a negative electrode disposed on one side of the separator;
- a negative current collector associated with the negative electrode;
- a positive electrode disposed on an opposite side of the separator;
- and
- a positive current collector associated with the positive electrode;
- wherein at least one of the separator, the lithium salt, the negative electrode, the negative current collector, the positive electrode, or the positive current collector is contacted by the supercritical substance prior to assembly in the lithium-based energy storage device.
Dependencies are inferred from the claim text.