Negative electrode for lithium ion secondary battery,...

Details Negative electrode for lithium ion secondary battery,... Negative electrode for lithium ion secondary battery,...

2011-04-05

2011-04-05

Ruddock, Ula C (Department: 1729)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode or plural tablets, pellets or discs

C429S209000, C429S218100

Reexamination Certificate

active

07919205

ABSTRACT:
A negative electrode for a lithium ion secondary battery of the present invention includes a current collector and an active material layer carried on the current collector. The active material layer contains silicon and oxygen. In the thickness direction of the active material layer, an oxygen ratio of the active material is greater at the side of the active material layer in contact with the current collector than at the side of the active material layer not in contact with the current collector. The active material layer contains no binder. By using the negative electrode described above, it is possible to provide a high capacity lithium ion secondary battery having superior high rate charge/discharge characteristics and excellent cycle characteristics.

REFERENCES:
patent: 2005/0048369 (2005-03-01), Koshina et al.
patent: 2005/0118504 (2005-06-01), Honda et al.
patent: 2006/0083987 (2006-04-01), Konishiike et al.
patent: 1763993 (2006-04-01), None
patent: 06-325756 (1994-11-01), None
patent: 2002-083594 (2002-03-01), None
patent: 2002-358954 (2002-12-01), None
patent: 2004-047404 (2004-02-01), None
Office Action dated Dec. 29, 2006.

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