Lithium titanate particle powder and method for producing the same, negative electrode active material particle powder for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

摘要

PROBLEM TO BE SOLVED: To provide lithium titanate particle powder in which battery characteristics with balance can be obtained among initial electric discharge capacity, an output characteristic (high electric discharge capacity maintenance rate), and gas generation control, when using the powder as active material for a non-aqueous electrolyte secondary battery.SOLUTION: In the impurities phase of TiOand LiTiOcontained in LiTiO, the lithium titanate particle powder is controlled of the BET specific surface area in the specific range, while making a specific quantity of LiTiOpresent therein. The lithium titanate particle powder concerned can be obtained by firing at least a mixture of LiTiOand TiOat 650°C or higher and lower than 800°C.