Nonaqueous electrolyte secondary battery

Details Nonaqueous electrolyte secondary battery Nonaqueous electrolyte secondary battery

2004-01-15

2008-11-25

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S223000, C429S224000, C429S231300

Reexamination Certificate

active

07455932

ABSTRACT:
A nonaqueous electrolyte secondary battery wherein a material capable of occluding/discharging lithium is used as a negative electrode material and a lithium-transition metal composite oxide which contains Ni and Mn as the transition metal and has a layered structure is used as a positive electrode material is characterized in that a lithium-transition metal composite oxide having a BET specific surface area less than 3 m2/g and a pH of 11.0 or less when 5 g of the lithium-transition metal composite oxide is immersed in 50 ml of purified water is used as the positive electrode active material.

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Yoshio, Masaki et al., “Preparation and Properties of LiCoyMnxNi1-x-yO2as a Cathode for Lithium Ion Batteries,”Journal of Power Sources, vol. 90, pp. 176-181, 2000.
Lu, Zhonghua et al., “Layered Li[NixCo1-2xMnx]O2Cathode Materials for Lithium-Ion Batteries,”Electrochemical and Solid-State Letters, 4 (12) pp. A200-A203, 2001.

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