POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR MANUFACTURING THE SAME, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: AIDA TAIRA, SUESHIGE YOSHITAKA
• Format: Patent
• Language: English; Japanese
• Published: 22.11.2018
• 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

PROBLEM TO BE SOLVED: To provide: a positive electrode active material for a nonaqueous electrolyte secondary battery, which enables the achievement of an excellent battery capacity, output characteristics, and charge/discharge cycle characteristics when used for a positive electrode of a secondary battery; and a method for manufacturing the same.SOLUTION: A positive electrode active material 100 for a nonaqueous electrolyte secondary battery and a method for manufacturing the same are herein disclosed. The method comprises the steps of: mixing a first lithium metal composite oxide including secondary particles 2 each constructed by agglomeration of a plurality of primary particles 1, a tungsten oxide A1 and water into a mixture; and drying the mixture to obtain a second lithium metal composite oxide 20. The first lithium metal composite oxide includes 0.1-1.0 mass% of tungsten to a total mass of the first lithium metal composite oxide. The mixture includes 0.1-0.5 mass% of tungsten in the tungsten oxide A1 to the total mass of the first lithium metal composite oxide.SELECTED DRAWING: Figure 4 【課題】二次電池の正極に用いられた場合に優れた電池容量、出力特性、及び、充放電サイクル特性が得られる非水系電解質二次電池用正極活物質とその製造方法の提供。【解決手段】複数の一次粒子１が凝集して構成された二次粒子２を含む第一のリチウム金属複合酸化物と、酸化タングステンＡ１と、水とを混合して混合物を得ることと、混合物を乾燥して、第二のリチウム金属複合酸化物２０を得ることと、を備え、第一のリチウム金属複合酸化物は、タングステンを、第一のリチウム金属複合酸化物全体に対して、０．１〜１．０質量％含み、混合物は、第一のリチウム金属複合酸化物全体に対して、前記酸化タングステンＡ１中のタングステンを０．１〜０．５質量％含む、非水系電解質二次電池用正極活物質１００、及びその製造方法。【選択図】図４