Nippon Chemical Industrial Co., Ltd.

Hidekazu Awano

Nobuyuki Yamazaki

Yoshihide Ooishi

Minoru Fukuchi

Yuuki Anbe

A method for manufacturing a cathode active material for a lithium rechargeable battery, including: selecting a first metal compound from a group consisting of a halide, a phosphate, a hydrogen phosphate and a sulfate of Mg or Al; selecting a second metal compound from a group consisting of an oxide, a hydroxide and a carbonate of Mg or Al; combining the first metal compound and the second metal compound to obtain a metal compound, the metal compound containing either Mg or Al atoms; mixing a lithium compound, a transition metal compound and the metal compound to obtain a mixture; and sintering the mixture.

Cathode active material for lithium rechargeable battery, manufacturing method thereof and lithium rechargeable battery

Lithium cobalt oxide, which can provide a nonaqueous electrolyte secondary battery having an excellent initial capacity and an excellent capacity retention, and a method for manufacturing the same are provided. The lithium cobalt oxide has a tap density of at least 1.7 g/cmand a pressed density of 3.5 to 4.0 g/cm. A method for manufacturing the lithium cobalt oxide includes the step of selecting a lithium cobalt oxide (A) and a lithium cobalt oxide (B) so that a difference in the tap density between the lithium cobalt oxide (A) and the lithium cobalt oxide (B) is at least 0.2 g/cm; and mixing the lithium cobalt oxide (A) and the lithium cobalt oxide (B).

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Tokyo, Japan

Hidekazu Awano