Seimi Chemical Co., Ltd.

Agc Seimi Chemical Co., Ltd.

Yukio Jitsugiri

Naoshi Saito

Manabu Suhara

Takeshi Kawasato

Kazushige Horichi

Yukimitsu Wakasugi

Koji Tatsumi

Tokumitsu Kato

Yukiko Amagasaki

A cathode active material for a non-aqueous electrolyte secondary battery comprises a lithium-containing composite oxide powder, which is represented by the formula LiNMOFwherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is zirconium and optionally at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than the element N, 0.9&#x2266;p&#x2266;1.1, 0.965&#x2266;x&#x2266;1.00, 0&#x2266;y&#x2266;0.035, 1.9&#x2266;z&#x2266;2.1, x+y=1 and 0&#x2266;a&#x2266;0.02, an atomic ratio of zirconium/the element N is in a range of at least 1.0 to 4.0. A method to produce the cathode active material is provided.

Cathode active material for non-aqueous electrolyte secondary battery and its production method

There is obtained a material of a positive electrode for a secondary lithium-ion cell having high cycle durability and high safety in high-voltage and high-capacity applications, which is a particulate positive electrode active material for a secondary lithium-ion cell represented by a general formula, LiCOABOF(A is Al or Mg, B is a group-IV transition element, 0.90&#x2266;a&#x2266;1.10, 0.97&#x2266;b&#x2266;1.00, 0.0001&#x2266;c&#x2266;0.03, 0.0001&#x2266;d&#x2266;0.03, 1.98&#x2266;e&#x2266;2.02, 0&#x2266;f&#x2266;0.02, and 0.0001&#x2266;c+d&#x2266;0.03), where element A, element B and fluorine are evenly present in the vicinity of the particle surfaces.

Positive electrode material for lithium secondary battery and process for producing the same

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Chigasaki, Japan

Yukio Jitsugiri