Toda Kogyo Corporation

Tetsuya Kashima

Akihisa Kajiyama

Kazumichi Koga

Kazutoshi Matsumoto

Osamu Sasaki

Shoichi Fujino

Ryuta Masaki

Tsuyoshi Wakiyama

Takayuki Yamamura

Provided herein are processes for producing positive electrode active substance particles for non-aqueous electrolyte secondary batteries which is excellent in life characteristics of a battery with respect to a repeated charging and discharging performance thereof, as well as a non-aqueous electrolyte secondary battery. In particular, provided herein are processes for producing a positive electrode active substance for non-aqueous electrolyte secondary batteries comprising lithium transition metal layered oxide having a composition represented by the formula: Li(NiCoMn)Owherein a is 1.0&#x2264;a&#x2264;1.15; x is 0&#x3c;x&#x3c;1; and y is 0&#x3c;y&#x3c;1, in which the positive electrode active substance is in the form of secondary particles formed by aggregating primary particles thereof, and a coefficient of variation of a compositional ratio: Li/Me wherein Me is a sum of Ni, Co and Mn as measured on a section of the secondary particle is not more than 25%.

Processes for preparing positive electrode active substance for non-aqueous electrolyte secondary batteries

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Onoda, Japan

Tetsuya Kashima