Electrode Material For Lithium Batteries
First Claim
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1. A composition consisting essentially of niobium, tantalum, phosphorous, and oxygen.
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Abstract
Substitution of tantalum into the lattice of monoclinic niobium phosphate results in improved reversibility, near 0% irreversible loss, and similar excellent 20 C high rate behavior in large grain material without the formation of electronically conducting nanocomposites. Tantalum substitution into niobium pentaphosphate enables an improved stabilization of the difficult to fabricate monoclinic niobium phosphate phase. Such tantalum-substituted niobium phosphates show excellent potential for use as electrodes in lithium or lithium-ion batteries.
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Citations
15 Claims
- 1. A composition consisting essentially of niobium, tantalum, phosphorous, and oxygen.
- 2. A composition consisting essentially of Nb(1-x)MxPO5, wherein M is at least one transition metal selected from among the Group 5 transition metals and the Group 6 transition metals, and wherein x is a value that is greater than 0 and less than 1.
- 5. A composition comprising Nb(1-x)TaxPO5 and at least one other chemical component, wherein x is a value that is greater than 0 and less than 1.
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6. (canceled)
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7. (canceled)
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8. (canceled)
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9. (canceled)
Specification