Patent ID: 7491467
Filing Date: 2009-02-17
Classification: H01M,Y02E

Abstract:
1. A negative electrode for a nonaqueous electrolyte secondary battery, wherein said negative electrode comprises a collector and a negative active material layer formed on a surface of said collector, wherein said negative active material layer comprises an active carbonaceous material and a binder composition, wherein said active carbonaceous material has metal oxide particles having an average particle diameter of less than or equal to 250 nm attached to a surface thereof, wherein said binder composition comprises a mixture of a binder having no olefinic unsaturated bond and a binder having no olefinic unsaturated bond, wherein said binder having no olefinic unsaturated bond is other than polyvinylidene difluoride, wherein a mixing ratio of said binder having no olefinic unsaturated bond to said binder having an olefinic unsaturated bond is less than or equal to 1.5, wherein a weight ratio of said active carbonaceous material having said metal oxide particles attached to said surface thereof to said binder composition is greater than 98/2 and less than or equal to 99.9/0.1, and wherein said metal oxide particles exhibit an attaching rate on said surface of said active carbonaceous material of from 0.5% to 90%.