High energy cathodes, batteries, and methods of making the same
AssigneeWattrii, Inc.
InventorJangwoo Kim
Life of this patent
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Abstract
Cathode active materials that include a metal compound having the formula MRx, where M is a metal, R is an atom, a molecule, or a radical having an oxidation state of −1, and x is a positive nonzero real number; and a metal oxide having the formula M′yOz, where M′ is a metal, and y and z are independently positive nonzero real numbers; provided that the metal compound and the metal oxide are in contact. The cathode active materials can be used to prepare cathodes that evolve little or no oxygen during operation. The cathodes can be economically incorporated into batteries that can provide high energy density.
Claims24
A cathode active material, comprising:
- a metal compound having an empirical formula of MRx, wherein M is a metal;
- R is an atom, a molecule, or a radical, where R has an oxidation state of −1 and x is a positive nonzero real number;
- and
- a metal oxide having an empirical formula of MyOz, wherein M is the same metal as found in the metal compound, and y and z are independently positive nonzero real numbers;
- wherein the metal compound and the metal oxide are in contact.
A cathode material, comprising:
- a cathode active material including a metal compound and a metal oxide;
- wherein the metal compound has an empirical formula of MRx, wherein M is a metal;
- R is an atom, a molecule, or a radical, where R has an oxidation state of −1 and x is a positive nonzero real number;
- and the metal oxide has an empirical formula of MyOz, wherein is the same metal as found in the metal compound, and y and z are independently positive nonzero real numbers;
- such that the metal compound and the metal oxide are in contact;
- and
- an electrically-conductive material;
- such that one or both of the metal compound and the metal oxide are in contact with the electrically-conductive material.
A battery having a cathode, wherein the cathode includes a cathode active material that includes a metal compound having an empirical formula of MRx, wherein M is a metal;
- R is an atom, a molecule, or a radical, where R has an oxidation state of −1 and x is a positive nonzero real number;
- and
- a metal oxide having an empirical formula of MyOz, wherein M is the same metal as found in the metal compound, and y and z are independently positive nonzero real numbers;
- wherein the metal compound and the metal oxide are in contact.
Dependencies are inferred from the claim text.