Lithium ion secondary battery and method for manufacturing same

Details Lithium ion secondary battery and method for manufacturing same Lithium ion secondary battery and method for manufacturing same

2011-01-25

2011-01-25

Ryan, Patrick (Department: 1726)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S247000, C429S251000, C029S623100

Reexamination Certificate

active

07875391

ABSTRACT:
A lithium ion secondary battery with improved safety against both internal short-circuiting and overcharge is provided. This lithium ion secondary battery includes a positive electrode comprising a composite lithium oxide, a negative electrode, and a non-aqueous electrolyte. At least one of the positive electrode and the negative electrode has a porous film, comprising an inorganic oxide filler and a binder, on the surface facing the other electrode, and the electrode surface having the porous film partially has a protruded part. This protruded part may be a protruded part formed on the porous film itself or a protruded part formed on an electrode mixture layer. Further, a separator can also be incorporated therein. Instead of the above-mentioned porous film, the separator can be provided with a porous film.

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English Translation of the Chinese Office Action, issued in Chinese Patent Application No. 2005800010958, dated on Jan. 4, 2008.

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