High capacity lithium-ion electrochemical cells and methods of making same
Assignee3M Innovative Properties Company
InventorLeif Christensen
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Abstract
High capacity lithium-ion electrochemical cells and methods of making the same are provided that include a positive electrode that includes a lithium mixed metal oxide having a first irreversible capacity and a negative electrode that includes an alloy anode material having a first irreversible capacity when the anode is delithiated to 0.9 V vs. Li/Li+. The lithium mixed metal oxide includes at least one of nickel, cobalt, and manganese. The alloy anode compound includes at least one of silicon and tin. The first cycle irreversible capacity of the positive electrode is greater than or equal to the first cycle irreversible capacity loss of the negative electrode.
Claims19
A lithium-ion electrochemical cell comprising:
- a positive electrode that includes a lithium mixed metal oxide having a first irreversible capacity;
- and
- a negative electrode that includes an alloy anode material having a first irreversible capacity when the anode is delithiated to 0.9 V vs. Li/Li+,
- wherein the lithium mixed metal oxide comprises at least one of nickel, cobalt, and manganese,
- wherein the alloy anode material comprises at least one of silicon and tin, and
- wherein the first cycle irreversible capacity of the positive electrode is greater than or equal to the first cycle irreversible capacity of the negative electrode.
A method of making a lithium-ion electrochemical cell comprising:
- selecting a positive electrode that includes a lithium mixed metal oxide that has a first cycle irreversible capacity;
- selecting a negative electrode that includes an alloy anode that has a first cycle irreversible capacity when delithiated to 0.9 V vs. Li/Li+;
- and
- constructing a lithium-ion electrochemical cell using an electrolyte, positive electrode and negative electrode,
- wherein the first cycle irreversible capacity of the positive electrode is greater than or equal to the first cycle irreversible capacity of the negative electrode.
Dependencies are inferred from the claim text.