Sumitomo Chemical Company, Limited

Tanaka Chemical Corporation

Yoshiaki Honda

Yasunori Uetani

Yuichiro Imanari

Hiroshi Inukai

Yoshihiro Kawakami

Yukiko Takenaka

Keita Murakami

A positive electrode active material for a lithium secondary battery, which includes a lithium-containing composite metal compound in the form of secondary particles that are aggregates of primary particles capable of being doped and undoped with lithium ions, each of the secondary particles having on its surface a coating layer including a metal composite oxide including lithium and aluminum, wherein the positive electrode active material includes at least nickel and aluminum as non-lithium metals, and satisfies all of the requirements (1) to (2).

Positive electrode active material for lithium secondary batteries, positive electrode for lithium secondary batteries, and lithium secondary battery

Disclosed is a photoelectric conversion element comprising an anode, a cathode, and an active layer between the anode and the cathode, wherein the active layer includes an n-type semiconductor and a p-type semiconductor, and an area of a p-n junction between the n-type semiconductor and the p-type semiconductor is 100 &#x3bc;mor more per 1 &#x3bc;mof the active layer.

Photoelectric conversion element

The present invention provides a lithium composite metal oxide containing Li and at least one transition metal element, wherein at least one lithium composite metal oxide particle constituting the lithium composite metal oxide has both hexagonal and monoclinic crystal structures. Further, the present invention also provides a lithium composite metal oxide containing Li, Ni and M (where, M represents one or more kinds of transition metal elements selected from the group consisting of Mn, Co and Fe), having a diffraction peak (diffraction peak A) at an angle 2&#x3b8; in a range from 20&#xb0; to 23&#xb0; in a powder X-ray diffraction pattern of a lithium composite metal oxide which is obtained by powder X-ray diffraction measurement made in the condition that CuK&#x3b1; is used as a radiation source and the measurement range of diffraction angle 2&#x3b8; is in a range from 10&#xb0; to 90&#xb0;.

Lithium composite metal oxide and nonaqueous electrolyte secondary battery

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Tsukuba, Japan

Yoshiaki Honda