LAYERED LITHIUM NICKEL COMPOSITE OXIDE POWDER AND PROCESS FOR PRODUCING THE SAME

Title:

LAYERED LITHIUM NICKEL COMPOSITE OXIDE POWDER AND PROCESS FOR PRODUCING THE SAME

Document Type and Number:

WIPO Patent Application WO/2004/102702

Kind Code:

A1

Abstract:

A layered lithium nickel composite oxide powder for high-density lithium secondary battery positive electrode material that can provide a lithium secondary battery of large capacity excelling in rate characteristics. In particular, a layered lithium nickel composite oxide powder for lithium secondary battery positive electrode material, which has a bulk density of 2.0 g/cc or higher, an average primary particle diameter (B) of 0.1 to 1 µm, a secondary particle median diameter (A) of 9 to 20 µm and a ratio (A/B) of secondary particle median diameter (A) to average primary particle diameter (B) of 10 to 200. There is further provided a process for producing the layered lithium nickel composite oxide powder, comprising dispersing a nickel compound and a compound of non-nickel transition metal element capable of substitution for lithium in a liquid medium, effecting spray drying of the thus obtained slurry, mixing the same with a lithium compound and firing the mixture to thereby obtain a layered lithium nickel composite oxide powder, wherein the spray drying is carried out under the conditions of 0.4 ≤ G/S ≤ 4 and G/S ≤ 0.0012V in which V represents the viscosity of slurry at spray drying (cp), S represents the amount of slurry supplied (g/min) and G represents the amount of gas supplied (L/min).

Inventors:

SHIZUKA KENJI (JP)

Application Number:

PCT/JP2004/006694

Publication Date:

November 25, 2004

Filing Date:

May 12, 2004

Export Citation:

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Assignee:

MITSUBISHI CHEM CORP (JP)
SHIZUKA KENJI (JP)

International Classes:

C01G53/00; H01M4/04; H01M4/131; H01M4/50; H01M4/505; H01M4/52; H01M4/525; H01M10/0525; H01M10/36; H01M4/02; H01M4/58; H01M4/587; H01M10/0568; (IPC1-7): H01M4/58; C01G53/00; H01M4/02; H01M10/40

Foreign References:

JP2003089526A	2003-03-28
JP2003095659A	2003-04-03

Other References: