PRECURSOR OF POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES AND MANUFACTURING METHOD THEREOF, AND POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES AND MANUFACTURING METHOD THEREOF

• Main Authors: AIDA TAIRA, TOYA HIROMASA
• Format: Patent
• Language: English; Japanese
• Published: 02.11.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide: a precursor of a positive electrode active material which makes no contribution to a charge and discharge reaction, and further, enables the obtention of a nonaqueous electrolyte secondary battery superior in battery characteristics and safety by reducing the quantity of impurities which would cause the corrosion of a baking furnace and a surrounding equipment; and a method for manufacturing such a precursor.SOLUTION: A method for manufacturing a precursor of a positive electrode active material for nonaqueous electrolyte secondary batteries which includes nickel manganese complex hydroxide particles having a particular composition ratio and has a hollow or porous structure, comprises: the step of cleaning the nickel manganese complex hydroxide particles each having a cavity structure therein with aqueous carbonate solution of which the carbonate concentration is 0.1 mol/L or more. 【課題】 充放電反応に寄与せず、さらに焼成炉および周辺設備を腐食させる不純物量を低減させることで、電池特性、および安全性に優れた非水系電解質二次電池を得ることが可能な正極活物質の前駆体とその製造方法を提供する。【解決手段】 特定の組成比を有するニッケルマンガン複合水酸化物粒子からなり、中空構造または多孔質構造を有する非水電解質二次電池用正極活物質の前駆体の製造方法であって、粒子内部に空隙構造を有するニッケルマンガン複合水酸化物粒子を、炭酸塩濃度が０．１ｍｏｌ／Ｌ以上の炭酸塩水溶液で洗浄することを特徴とする非水電解質二次電池用正極活物質の前駆体の製造方法等による。【選択図】なし