Li-ion batteries with improved abuse tolerance and performance
AssigneeXilectric, Inc.
InventorSTEVEN E. WEISS
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Abstract
A lithium-ion battery includes a cathode comprising a lithium compound and the cathode further includes solid additives based on metal nitrides and/or borates. The solid additives improve the capacity retention of the lithium-ion battery and extend the battery lifetime. The solid additives also reduce the growth in internal resistance of the lithium-ion battery that is known to occur as Li-ion batteries age. The solid additives help stabilize the lithium-ion chemistry to high cell potentials or temperatures.
Claims24
A lithium-ion battery comprising:
- a cathode comprising a lithium compound;
- wherein the cathode further comprises solid additives based on metal nitrides and borates.
A method for preparing a lithium-ion battery comprising:
- providing a cathode comprising a lithium compound;
- adding solid additives to the cathode wherein the solid additives comprise metal nitrides and borates.
A solid buffer material to be used in the production of cathodes for Li-ion batteries comprising a metal nitride and a borate.
A method for producing a solid buffer material to be used in the production of Li-ion batteries comprising:
- providing a metal nitride in particulate form;
- adding the metal nitride to a borate to form a particulate mixture;
- and
- milling the particulate mixture.
Dependencies are inferred from the claim text.