Sharp Kabushiki Kaisha Corporation

Shogo Esaki

Motoaki Nishijima

Isao Tanaka

Koji Fujita

Shunsuke Murai

Koji Ohira

Toshitsugu Sueki

Yukinori Koyama

Katsuhisa Tanaka

A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below,LiFeMPSiO&#x2003;&#x2003;(1),

Cathode active material, cathode and nonaqueous secondary battery

A cathode active material of the present invention is a cathode active material having a composition represented by General Formula (1) below,LiFeMPSiO&#x2003;&#x2003;(1), where: an average valence of Fe is +2 or more; M is an element having a valence of +2 or more and is at least one type of element selected from the group consisting of Zr, Sn, Y, and Al; the valence of M is different from the average valence of Fe; 0&#x3c;x&#x2266;0.5; and y=x&#xd7;({valence of M}&#x2212;2)+(1&#x2212;x)&#xd7;({average valence of Fe}&#x2212;2). This provides a cathode active material that not only excels in terms of safety and cost but also can provide a long-life battery.

A method of producing a positive electrode active material, comprising the steps of:

Positive electrode active material, production method thereof and its use

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Osaka, Japan

Shogo Esaki