Process for producing lithium-containing composite oxide for...

Details Process for producing lithium-containing composite oxide for... Process for producing lithium-containing composite oxide for...

2007-08-14

2010-11-30

Bos, Steven (Department: 1793)

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

C423S301000, C423S306000, C252S519100, C252S519120, C252S519130, C252S519140, C252S519150, C252S182100, C429S219000, C429S220000, C429S221000, C429S222000, C429S223000, C429S224000, C429S229000, C429S231100, C429S231200, C429S231300

Reexamination Certificate

active

07842268

ABSTRACT:
To provide a cathode active material for a lithium secondary battery, which is low in gas generation and has high safety and excellent durability for charge and discharge cycles even at a high charge voltage.A process for producing a lithium-containing composite oxide represented by the formula LipLqNxMyOzFa(wherein L is at least one element selected from the group of B and P, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9≦p≦1.1, 1.0≦q<0.03, 0.97≦x<1.00, 0≦y≦0.03, 1.9≦z≦2.1, q+x+y=1 and 0≦a≦0.02), wherein a lithium-containing composite oxide powder containing an N element and, if necessary, an M element and fluorine, is preliminarily prepared; the lithium-containing composite oxide powder is mixed with an aqueous solution containing the L element source; from the obtained mixture, an aqueous medium is removed, followed by the firing in an oxygen-containing atmosphere at from 300 to 1,050° C.

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