Lithium-transition metal oxide powder and method of producing the same, positive electrode active material for lithium ion battery, and lithium ion secondary battery

Abstract

There is provided a lithium-transition metal oxide powder with a coating layer containing lithium niobate formed on a part or the whole part of a surface of a lithium-transition metal oxide particle and having a low powder compact resistance, and a positive electrode active material for a lithium ion battery containing the lithium-transition metal oxide powder. Specifically, there is provided the lithium-transition metal oxide powder composed of a lithium-transition metal oxide particle with a part or the whole part of a surface coated with a coating layer containing lithium niobate, wherein a carbon-content is 0.03 mass % or less.

Description

[0001] This is a Divisional of application Ser. No. 13 / 818,264 filed Feb. 21, 2013, which is a National Stage Application of PCT / JP2011 / 071444 filed Sep. 21, 2011. The entire disclosures of the prior applications are hereby incorporated by reference herein their entirety.TECHNICAL FIELD

[0002] The present invention relates to a lithium-transition metal oxide powder and a method of producing the same, a positive electrode active material for a lithium ion battery, and a lithium ion secondary battery.DESCRIPTION OF RELATED ART

[0003] The lithium ion secondary battery is characterized in that energy density is high, and an operation at a high voltage is enabled, and therefore is used for an information device such as a cellular phone as a secondary battery that is easy to be miniaturized and reduced in weight. Further, in recent years, demand as the secondary battery for a large power of a hybrid car, etc., has been increased.

[0004] A non-aqueous solvent electrolyte in which salt is dissolve...