POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF, AND LITHIUM ION SECONDARY BATTERY USING THE SAME

To provide a positive electrode active material which can achieve both of a high output property and high durability without lowering an energy density and further, a method by which such a positive electrode active material can be manufactured readily in an industrial scale production.SOLUTION: A p...

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Main Authors YAMAUCHI MITSURU, ITO YASUSHI, KOMUKAI TETSUSHI
Format Patent
LanguageEnglish
Japanese
Published 12.12.2019
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Summary:To provide a positive electrode active material which can achieve both of a high output property and high durability without lowering an energy density and further, a method by which such a positive electrode active material can be manufactured readily in an industrial scale production.SOLUTION: A positive electrode active material for a lithium ion secondary battery comprises a lithium nickel complex oxide. The lithium nickel complex oxide is represented by the general formula, LiNiCoMnSiO(where u, x, y and z satisfy 0.03≤u≤0.10, 0.2≤x≤0.35, 0.2≤y≤0.35, 0.003≤z≤0.010 and 0≤α≤0.15); a diameter of a crystallite determined from a half width of a (003)-plane diffraction peak in X-ray diffraction by Scherrer formula is 120 nm or more and 150 nm or less.SELECTED DRAWING: None 【課題】 エネルギー密度を落とすことなく、高い出力特性と耐久性を両立することのできる正極活物質を提供し、さらに、このような正極活物質を、工業規模の生産において容易に製造することができる方法を提供する。【解決手段】 リチウムニッケル複合酸化物を含むリチウムイオン二次電池用正極活物質であって、前記リチウムニッケル複合酸化物が、一般式:Li1+uNi1−x−y−zCoxMnySizO2+α(ただし、式中のu、x、y及びzは、0.03≦u≦0.10、0.2≦x≦0.35、0.2≦y≦0.35、0.003≦z≦0.010、0≦α≦0.15)で表され、X線回折の(003)面回折ピークの半価幅からScherrer式により求められる結晶子径が120nm以上、150nm以下であることを特徴とするリチウムイオン二次電池用正極活物質。【選択図】なし
Bibliography:Application Number: JP20180104375