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1. WO2007000286 - INORGANIC COMPOUNDS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

CLAIMS

1. A compound having the formula LixNiabMncθ2, wherein a, b and c are
independently of each other a number from 0.05 to 0.8, the sum of a, b and c being 0.95 <= 1 <= 1.02, and x being a number from 0.98 - 1.05 while x + a + b + c = 2, said compound having a substantially single phase, hexagonal layered crystal structure and being substantially free of localized cubic spinel-like structural phases.

2. A compound having the formula LixNiabMncθ2, wherein a, b and c are independently of each other a number from 0.05 to 0.8, the sum of a, b and c being 0.95 <= 1 <= 1.02, and x being a number from 0.98 - 1.05 while x + a + b + c = 2, said compound having a substantially single phase, hexagonal layered crystal structure and being substantially free of localized cubic spinel-like structural phases, said compound being obtainable by a method which comprises providing a
compound of said formula at a temperature of at least 600° C; and cooling the compound at a rate of less than 20° C/min.
3. The compound according to Claim 1 or 2, 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 (003).
4. The compound according to any of the preceding claim's, wherein the ratio of the peak height of the diffraction peak corresponding to
Miller indices (104) to the integrated intensity of the diffraction peak corresponding to Miller indices (003) using powder x-ray diffraction is from 0.4 to 0.8.
5. The compound according to any of the preceding claims having the formula

LiNio.33Coo.33Mno.33O2, LiNio.475Coo.o5Mn0.475C>2, LiNio.5Coo.2Mno.3O2,
LiNio.7Coo.2Mno.1O2 or LiNio.77Coo.13Mno.1O2.
6. A lithium or lithium ion secondary battery including a positive electrode comprising the compound of any of the preceding claims.
7. Electric or electronic device comprising a lithium or lithium ion secondary battery according to claim 6.
8. Electric or electronic device according to claim 7 being selected from the group consisting of cellular phones, camcorders, laptop computers, electric vehicles and hybrid electric vehicles.
9. A method of preparing a compound having a substantially single phase, hexagonal structural phases, the method comprising the steps of providing a lithium metal oxide having the formula LixNiabMncθ2, wherein a, b and c are independently of each other a number from 0.05 to 0.8, the sum of a, b and c being 0.95 <= 1 <= 1.02, and x being a number from 0.98 - 1.05 while x + a + b + c = 2, at a temperature of at least about 600° C; and wherein the cooling rate is determined by a function
T= f * EXP(R*t), wherein T is the temperature in degrees centigrade, f is a factor, R is the cooling rate and t is the cooling time in minutes, wherein f is from 6000C to 10000C and R is from 0.0009 to 0.01 , and the function is non linear.
10. The method according to Claim 9, wherein f is from 7500C to 850°C and R is from 0.001 to 0.009.
11. The method according to Claim 9 or 10, wherein R is from 0.002 to 0.005.
12. The method according to any of Claims 9-11 , wherein R is from 0.003 to 0.0044.

13. The method according to any of Claims 9-12, wherein said providing step comprises providing the LixNiabMncθ2, compound at a temperature of at least about 6000C.
14. The method according to any of Claims 9-13, wherein said cooling step comprises uniformly cooling the LixNiabMncθ2 compound. •
15. The method according to any of Claims 9-14, wherein said providing step comprises synthesizing the LixNiabMncθ2 compound at- a temperature of at least about 600 C.
16. The method according to any of Claims 9-14, wherein said providing step comprising heating a previously-synthesized LixNiabMncθ2 compound to a temperature of at least about 600 C.
17. The use of a compound of any of claims 1 to 5 in a positive electrode of a lithium or lithium ion secondary battery.
18. A method for creating a product specification for a batch, lot, or shipment of ar compound according to claim 1 , comprising specifying at least one property value for said batch, lot, or shipment.
19. A method of doing business with a customer comprising using a product specification that includes a property value to request a certain batch, lot, or shipment and/or to provide a certain batch, lot, or shipment of particulate material. 20 The method of claim 18 or 19, wherein the property value is included on a product specification sheet, purchase order, invoice, contract, waiver to a contract, or combinations thereof for the batch, lot, or shipment of a compound according to any of claims 1 to 6.
21. The method of claim 18 to 19, wherein said specifying comprises determining at least one property value for said batch, lot, or shipment of particulate material.
22. The method of claim 21 , wherein said determining comprises measuring or analyzing said batch, lot, or shipment.
23. The method of claim 18 to 19, wherein said specifying comprises characterizing the batch, lot, or shipment of particulate material by at least one interfacial potential value.
24. The method of claim 18 or 19, further comprising the step of specifying at least one morphological value like surface area, particle size, structure, porosity, tap density, particle shape factor or combinations thereof, to said batch, lot, or shipment of particulate material.
25. A method for improving identification of a grade, type, or brand of particulate material comprising the step of updating an existing product description for the grade, type, or brand of particulate material by adding at least one property value.
26. The method of claim 18, 19 or 25, wherein said product description is in a catalogue, web site, brochure, particulate material literature, advertisement, label, or combinations thereof.