CATHODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Author: HAMAGUCHI MASAYA
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2022
• Subjects: 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

To provide a cathode active material for non-aqueous electrolyte secondary battery capable of constituting a non-aqueous electrolyte secondary battery having excellent output characteristics, and a manufacturing method thereof.SOLUTION: A cathode active material for non-aqueous electrolyte secondary battery contains lithium transition metal composite oxide having a layered structure containing at least one metal element M1 of lithium, nickel, titanium and zirconium. The lithium transition metal composite oxide has a composition that a ratio D50/DSEM with respect to an average particle diameter DSEM based on an electron microscope observation of 50% particle diameter D50 in a cumulative grain size distribution according to a volume reference is 1 or more and 4 or less, a ratio of a mol number of nickel with respect to a total mol number of a metal other than lithium is 0.3 or more and less than 1, and a ratio of a mol number of the metal element M1 with respect to the total mol number of the metal other than lithium is 0.025 or less.SELECTED DRAWING: Figure 1 【課題】優れた出力特性を有する非水電解質二次電池を構成可能な非水電解質二次電池用正極活物質及びその製造方法を提供する。【解決手段】非水電解質二次電池用正極活物質は、リチウムと、ニッケルと、チタン及びジルコニウムの少なくとも一方の金属元素Ｍ１とを含む層状構造を有するリチウム遷移金属複合酸化物を含み、前記リチウム遷移金属複合酸化物は、体積基準による累積粒度分布における５０％粒径Ｄ５０の電子顕微鏡観察に基づく平均粒径ＤＳＥＭに対する比Ｄ５０／ＤＳＥＭが１以上４以下であり、リチウム以外の金属の総モル数に対するニッケルのモル数の比が０．３以上１未満であり、リチウム以外の金属の総モル数に対する金属元素Ｍ１のモル数の比が０．０２５以下である組成を有する。【選択図】図１