| US 7,579,114 B2 | ||
| Method of preparing positive electrode active material | ||
| Tsutomu Ohzuku, Nara (Japan); Hiroshi Yoshizawa, Osaka (Japan); and Masatoshi Nagayama, Osaka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan); and Osaka City University, Osaka (Japan) | ||
| Filed on Sep. 14, 2006, as Appl. No. 11/531,887. | ||
| Application 11/531887 is a division of application No. 10/242052, filed on Sep. 12, 2002. | ||
| Claims priority of application No. 2001-278536 (JP), filed on Sep. 13, 2001. | ||
| Prior Publication US 2007/0009424 A1, Jan. 11, 2007 | ||
| Int. Cl. H01M 4/04 (2006.01); H01M 4/50 (2006.01); H01M 4/52 (2006.01) | ||
| U.S. Cl. 429—231.1 [29/623.1; 429/223; 429/224; 429/231.3; 429/221] | 8 Claims |
| 1. A production method of a positive electrode active material for a non-aqueous electrolyte battery, comprising the steps
of:
introducing into a reaction vessel an alkaline solution and an aqueous solution containing two or more transition metal salts
or two or more aqueous solutions containing different transition metal salts;
coprecipitating using a reductant or an inert gas to obtain a hydroxide or an oxide precursor of at least two transition metals;
drying said hydroxide or oxide at 300 to 500° C. to obtain a dry precursor; and
baking a mixture of said dry precursor and a lithium compound at a temperature of 900° C. to 1200° C. to obtain a lithium-containing
transition metal oxide, wherein the lithium-containing transition metal oxide contains Mn and Ni in a 1:1 molar ratio.
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