Nissan Motor Company Limited

Envision Aesc Japan Ltd.

Kodai Nagano

Shigeo Ibuka

Kazuki Miyatake

Ikuma Matsuzaki

Manabu Kaseda

Kenta Uwai

Keisuke Matsumoto

Hiroaki Tanizaki

A positive electrode for non-aqueous electrolyte secondary battery suppresses a decrease in discharge capacity under a high output condition while minimizing an increase in battery temperature in an overcharged state of the battery. The positive electrode includes: a positive electrode current collector; and a positive electrode active material layer that is formed on a surface of the positive electrode current collector, contains a positive electrode active material and a conductive aid, and has a BET specific surface area of from 1 to 3 m/g, in which the conductive aid contains a first conductive aid and a second conductive aid having a larger average particle diameter than the first conductive aid. The content of the first conductive aid is greater than the content of the second conductive aid in the positive electrode active material layer.

Positive electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery using the same

[Object] Provided is a means which is capable, with respect to a non-aqueous electrolyte secondary battery, of suppressing a decrease in capacity when the battery is used for a long period of time, and improving cycle characteristics. [Solving Means] Disclosed is a positive electrode active substance for a non-aqueous electrolyte secondary battery comprising a composite oxide containing lithium and nickel, in which the positive electrode active substance has a structure of secondary particles formed by aggregation of primary particles, the average particle diameter of the primary particles (D1) is 0.9 &#x3bc;m or less, and the ratio value (D2/D1)) of the average particle diameter of the secondary particles (D2) to the average particle diameter of the primary particles (D1) is 11 or more. [Representative Drawing] None

Positive electrode active substance, positive electrode material, positive electrode, and non-aqueous electrolyte secondary battery

Disclosed is a positive electrode active substance for a non-aqueous electrolyte secondary battery including a composite oxide containing lithium and nickel, in which the positive electrode active substance has a structure of secondary particles formed by aggregation of primary particles. The average particle diameter of the primary particles (D1) is 0.9 &#x3bc;m or less. The average particle diameter of the primary particles (D1) and the standard deviation (&#x3c3;) of the average particle diameter of the primary particles (D1) meet the relationship of D1/&#x3c3;&#x2267;24.

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Yokohama, Japan

Kodai Nagano