POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY

A positive electrode active material, which has a crystallite size ±/crystallite size ² ratio (±/²) of 1 to 1.75 or less, wherein the crystallite size ± is within a peak region of 2¸ = 18.7 ± 1° and the crystallite size ² is within a peak region of 2¸ = 44.6 ± 1°, each determined by a powder X-ray d...

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Hauptverfasser:	YAMASHITA Daisuke, DOUMAE Kyousuke, TAKAMORI Kenji, NAKAO Kimiyasu, KURITA Hiroyuki, IMANARI Yuichiro
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ELECTRICITY INORGANIC CHEMISTRY METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	A positive electrode active material, which has a crystallite size ±/crystallite size ² ratio (±/²) of 1 to 1.75 or less, wherein the crystallite size ± is within a peak region of 2¸ = 18.7 ± 1° and the crystallite size ² is within a peak region of 2¸ = 44.6 ± 1°, each determined by a powder X-ray diffraction measurement using Cu-K± ray, and has a composition represented by formula (I) below: Li[Li x (Ni a Co b Mn c M d ) 1-x ]O 2 (I) wherein 0 ¦ x ¦ 0.2, 0.3 < a < 0.7, 0 < b < 0.4, 0 < c < 0.4, 0 ¦ d < 0. 1, a + b + c + d = 1, and M is at least one metal selected from the group consisting of Fe, Cr, Ti, Mg, Al and Zr.