Yuan A Gao

6361756, Mar 26, 2002

Nov 19, 1999

09/442302

Yuan Gao - Ocean NJ
Marina Yakovleva - Gastonia NC

FMC Corporation - Philadelphia PA

C01G 4512

423599, 423594, 423596, 423598, 429224

The present invention includes lithium manganese oxide compounds of the formula: wherein 0x0. 5, [A] is a combination of two or more dopants, and the average oxidation state N of the dopant combination [A] is +2. 8N+3. 2. The present invention also includes lithium and lithium-ion secondary batteries that use these lithium manganese oxide compounds as the positive electrode material. Moreover, the present invention includes methods of preparing these lithium manganese oxide compounds.

6579475, Jun 17, 2003

Dec 7, 2000

09/731949

Yuan Gao - Ocean NJ
Marina Yakovleva - Gastonia NC
John F. Engel - Belmont NC

FMC Corporation - Philadelphia PA

H01B 108

2525212, 2525181, 4292181, 4292313, 42923195, 429223, 429224, 429322, 429209, 423594, 423599, 423617, 423624, 423635, 423641

The present invention includes lithium cobalt oxides having hexagonal layered crystal structures and methods of making same. The lithium cobalt oxides of the invention have the formula Li Co A O wherein 0. 96w1. 05, 0x0. 05, -0. 02y0. 02 and A is one or more dopants. The lithium cobalt oxides of the invention preferably have a position within the principal component space defined by the relationship ax +by c, wherein x ={right arrow over (S)} {right arrow over (P)} ; y ={right arrow over (S)} {right arrow over (P)} ; the vector {right arrow over (S)} is the x-ray spectrum for the Li Co A O compound; the vectors {right arrow over (P)} and {right arrow over (P)} defining the principal component space are determined by measuring the x-ray powder diffraction values {right arrow over (S)} between 15Â and 120Â using a 0. 02Â step size and CuK rays for a large sample set of lithium cobalt oxides and using the regression of {right arrow over (S)} of the sample set against the capacity fade after 50 cycles of a lithium coin cell that includes a lithium negative electrode and the lithium cobalt oxide as the positive electrode material and that is cycled between 3. 0 and 4. 3V at a constant current of C/3 during both charge and discharge cycles; and the values a, b and c are determined by using only the x and y values for Li Co A O compounds in the sample set that have a capacity fade after 50 cycles of less than or equal to 15%.

6582852, Jun 24, 2003

May 30, 2000

09/580088

Yuan Gao - Ocean NJ
Marina Yakovleva - Gastonia NC
Walter B. Ebner - Budd Lake NJ

FMC Corporation - Philadelphia PA

H01M 448

4292311, 4292312, 4292313, 423594

The present invention relates to metal oxides containing multiple dopants. The metal oxides have the formula: wherein M is a transition metal, wherein B is an element used to replace the transition metal M and w is the fractional amount of element B in the total dopant combination such that n is the total number of dopant elements used and is a positive integer of two or more, wherein the fractional amount w of dopant element B is determined by the relationship E is the oxidation state of dopant B in the final product LiM [A] O or M [A] O , the dopant elements B are cations in the intercalation compound, and the ratio of Li to O in the intercalation compound is not smaller than the ratio of Li to O in the undoped compound LiM O or M O. The present invention also includes methods of preparing same and specific embodiments of same.

6589499, Jul 8, 2003

Sep 12, 2001

09/952355

Yuan Gao - Ocean NJ
Marina Yakovleva - Gastonia NC
Hugh H. Wang - Brandon FL

FMC Corporation - Philadelphia PA

C01D 1500

423594, 4292181, 4292313

A compound having the formula Li Co A O , is provided wherein A is one or more dopants having an average oxidation state N such that +2. 5N+3. 5, 0. 901. 10, 0, 0 and +=1. The compound has a substantially single phase, hexagonal layered crystal structure and is substantially free of localized cubic spinel-like structural phases, wherein, in the powder x-ray diffraction pattern, there are no diffraction peaks at a smaller scattering angle than the diffraction peak corresponding to Miller indices.

6620400, Sep 16, 2003

Sep 12, 2001

09/952357

Yuan Gao - Ocean NJ
Marina Yakovleva - Gastonia NC
Hugh H. Wang - Brandon FL
John F. Engel - Belmont NC

FMC Corporation - Philadelphia PA

C01D 1500

42359415, 4235946, 423599

The present invention includes substantially single-phase lithium metal oxide compounds having hexagonal layered crystal structures that are substantially free of localized cubic spinel-like structural phases. The lithium metal oxides of the invention have the formula Li M A O , wherein M is one or more transition metals, A is one or more dopants having an average oxidation state N such that +2. 5N+3. 5, 0. 901. 10, and +=1. The present invention also includes dilithiated forms of these compounds, lithium and lithium-ion secondary batteries using these compounds as positive electrode materials, and methods of preparing these compounds.

6794085, Sep 21, 2004

Jun 7, 2002

10/165023

Yuan Gao - Ocean NJ
Marina Yakovleva - Gastonia NC
Walter B. Ebner - Budd Lake NJ

FMC Corporation - Philadelphia PA

H01M 452

4292313, 4292315, 4292316

The present invention relates to metal oxides containing multiple dopants. The metal oxides have the formula: wherein M is a transition metal, 0xy, [A]= wherein B is an element used to replace the transition metal M and w is the fractional amount of element B in the total dopant combination such that n is the total number of dopant elements used and is a positive integer of two or more, wherein the fractional amount w of dopant element B is determined by the relationship E is the oxidation state of dopant B in the final product LiM [A] O or M [A] O , the dopant elements B are cations in the intercalation compound, and the ratio of Li to O in the intercalation compound is not smaller than the ratio of Li to O in the undoped compound LiM O or M O. The present invention also includes methods of preparing same and specific embodiments of same.

6932922, Aug 23, 2005

Apr 25, 2003

10/424056

Yuan Gao - Ocean NJ, US
Marina Yakovleva - Gastonia NC, US
John F. Engel - Belmont NC, US

FMC Corporation - Philadelphia PA

C01G051/04
C01D015/00
C04B035/64
H01M004/52

2525212, 2525181, 252500, 4292313, 429223, 423641, 4235895

The present invention includes lithium cobalt oxides having hexagonal layered crystal structures and methods of making same. The lithium cobalt oxides of the invention have the formula LiCoAOwherein 0. 96≦w≦1. 05, 0≦x≦0. 05, −0. 02≦y≦0. 02 and A is one or more dopants. The lithium cobalt oxides of the invention preferably have a position within the principal component space defined by the relationship ax+by≦c, wherein x={right arrow over (S)}•{right arrow over (P)}; y={right arrow over (S)}•{right arrow over (P)}; the vector {right arrow over (S)}is the x-ray spectrum for the LiCoAOcompound; the vectors {right arrow over (P)}and {right arrow over (P)}defining the principal component space are determined by measuring the x-ray powder diffraction values {right arrow over (S)}between 15 and 120 using a 0. 02 step size and CuKα rays for a large sample set of lithium cobalt oxides and using the regression of {right arrow over (S)}of the sample set against the capacity fade after 50 cycles of a lithium coin cell that includes a lithium negative electrode and the lithium cobalt oxide as the positive electrode material and that is cycled between 3. 0 and 4. 3V at a constant current of C/3 during both charge and discharge cycles; and the values a, b and c are determined by using only the xand yvalues for LiCoAOcompounds in the sample set that have a capacity fade after 50 cycles of less than or equal to 15%.

7074382, Jul 11, 2006

Jun 12, 2002

10/170180

Yuan Gao - Ocean NJ, US
Marina Yakovleva - Gastonia NC, US
Hugh H. Wang - Brandon FL, US
John F. Engel - Belmont NC, US

FMC Corporation - Philadelphia PA

C01D 15/00
C01G 51/00

4235944, 4235946, 4292313

The present invention includes substantially single-phase lithium metal oxide compounds having hexagonal layered crystal structures that are substantially free of localized cubic spinel-like structural phases. The lithium metal oxides of the invention have the formula LiMAO, wherein M is one or more transition metals, A is one or more dopants having an average oxidation state N such that +2. 5≦N≦+3. 5, 0. 90≦α≦1. 10, and β+γ=1. The present invention also includes dilithiated forms of these compounds, lithium and lithium-ion secondary batteries using these compounds as positive electrode materials, and methods of preparing these compounds.