Lithium metal oxides
AssigneeNanaGram Corporation
InventorsSujeet Kumar, Craig R. Horne
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Abstract
Lithium metal oxide particles have been produced having average diameters less than about 100 nm. Composite metal oxides of particular interest include, for example, lithium cobalt oxide, lithium nickel oxide, lithium titanium oxides and derivatives thereof. These nanoparticles composite metal oxides can be used as electroactive particles in lithium or lithium ion batteries. Batteries of particular interest include lithium titanium oxide in the negative electrode and lithium cobalt manganese oxide in the positive electrode.
Claims45
A method of producing lithium metal oxide particles wherein the metal comprises a metal-1 and a metal-2, the method comprising heating precursor particles in an oxidizing atmosphere, the precursor particles being formed by reacting a precursor aerosol the precursor aerosol comprising precursor compounds of lithium, metal-1 and metal-2, wherein the relative amounts of lithium, metal-1 and metal-2 are selected to yield a desired stoichiometry of the resulting lithium metal oxide particles, wherein effectively no lithium metal oxide particles have a diameter greater than about 4 times the average particle diameter of the lithium metal oxide particles.
A method of producing lithium metal oxide particles wherein the metal comprises a metal-1 and a metal-2, the method comprising heating precursor particles in an oxidizing atmosphere, the precursor particles being formed by reacting a precursor aerosol in a flow that intersects a radiation beam and wherein energy absorbed from the radiation beam drives the reaction, the precursor aerosol comprising precursor compounds of lithium, metal-1 and metal-2, wherein the relative amounts of lithium, metal-1 and metal-2 are selected to yield a desired stoichiometry of the resulting lithium metal oxide particles.
A method of producing lithium metal oxide particles wherein the metal comprises a metal-1 and a metal-2, the method comprising heating precursor particles in an oxidizing atmosphere, the precursor particles being formed by reacting a precursor aerosol, the precursor aerosol comprising precursor compounds of lithium, metal-1 and metal-2 wherein metal-1 is selected from the group consisting of titanium, aluminum, and lanthanum.
A method of producing lithium nickel metal oxide particles wherein the metal comprises chromium, boron, barium, gallium, strontium, calcium, iron, titanium or combinations thereof, the method comprising heating precursor particles in an oxidizing atmosphere, the precursor particles being formed by reacting a precursor aerosol, the precursor aerosol comprising precursor compounds of lithium, nickel and the metal, wherein effectively no lithium nickel metal oxide particles have a diameter greater than about 4 times the average particle diameter of the lithium nickel metal oxide particles.
A method of producing lithium cobalt metal oxide particles wherein the metal comprises chromium, boron, barium, strontium, calcium, iron, titanium or combinations thereof, the method comprising heating precursor particles in at oxidizing atmosphere, the precursor particles being formed by reacting a precursor aerosol, the precursor aerosol comprising precursor compounds of lithium, cobalt and the metal, wherein effectively no lithium cobalt metal oxide particles have a diameter greater than about 4 times the average particle diameter of the lithium cobalt metal oxide particles.
Dependencies are inferred from the claim text.