METAL COMPOSITE HYDROXIDE PARTICLE, PRODUCTION METHOD OF METAL COMPOSITE COMPOUND, AND PRODUCTION METHOD OF CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY

• Main Authors: NAKAYA AYAKA, NAKAO KIMIYASU, TAKAMORI KENJI
• Format: Patent
• Language: English; Japanese
• Published: 25.01.2024
• 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 metal composite compound to be used as a precursor of a cathode active material for a lithium secondary battery, by which a lithium secondary battery having a high discharge rate characteristic can be achieved; a production method of the metal composite compound; and a production method of a cathode active material for a lithium secondary battery, using the metal composite compound.SOLUTION: A metal composite compound hereof is to be used as a precursor of a cathode active material for a lithium secondary battery. The metal composite compound comprises at least one metal element selected from a group consisting of Ni, Co and Mn, and it satisfies all of the requirements (1) to (3) below. (1) The average particle strength is 10 MPa or more and below 45 MPa. (2) The average particle diameter D50 is 1.0 μm or more and 4.0 μm or less. (3) BET specific surface area is 40 m2/g or more and 100 m2/g or less.SELECTED DRAWING: None 【課題】放電レート特性が高いリチウム二次電池が得られる、リチウム二次電池用正極活物質の前駆体として用いられる金属複合化合物、前記金属複合化合物の製造方法、及び前記金属複合化合物を用いたリチウム二次電池用正極活物質の製造方法の提供。【解決手段】リチウム二次電池用正極活物質の前駆体として用いられる金属複合化合物であって、Ｎｉ、Ｃｏ、及びＭｎからなる群から選択される少なくとも１種の金属元素を含み、下記要件（１）～（３）をすべて満たす金属複合化合物。（１）平均粒子強度が、１０ＭＰａ以上４５ＭＰａ未満である。（２）平均粒子径Ｄ５０が、１．０μｍ以上４．０μｍ以下である。（３）ＢＥＴ比表面積が４０ｍ２／ｇ以上１００ｍ２／ｇ以下である。【選択図】なし