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US 8,999,561 B2Granted
Materials for electrochemical device safety
AssigneeUchicago Argonne, LLC
InventorsDaniel R. Vissers, Khalil Amine, Michael M. Thackeray, Arthur J. Kahaian, Christopher S. Johnson
Life of this patent
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Abstract
An electrochemical device includes a thermally-triggered intumescent material or a gas-triggered intumescent material. Such devices prevent or minimize short circuits in a device that could lead to thermal run-away. Such devices may include batteries or supercapacitors.
Claims31
An electrochemical device comprising:
- a positive electrode;
- a negative electrode;
- a separator;
- a casing;
- and
- an effective amount of a thermally-triggered intumescent material or a gas-triggered intumescent material;
- wherein:
- the intumescent material is coated on the surface of the positive electrode, on the surface of the negative electrode, or on the surface of the separator as an intumescent material coating;
- and
- the effective amount is an amount sufficient to impede electron flow and prevent or abate a run-away thermal event.
7 more elements
An electrochemical device comprising an effective amount of a thermally-triggered intumescent material or a gas-triggered intumescent material;
- wherein:
- the intumescent material comprises a tetrahydrofuran-based-16-crown-4 compound, a lithium ionophore, or a porous material;
- and
- the effective amount is an amount sufficient to impede electron flow and prevent or abate a run-away thermal event.
1 more element
Dependencies are inferred from the claim text.