Battery

Details Battery Battery

2006-11-07

2006-11-07

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S224000, C429S221000, C429S223000, C429S220000, C429S229000, C429S231500, C429S231100, C429S231300, C429S232000

Reexamination Certificate

active

07132197

ABSTRACT:
Provided is a battery with a higher capacity, a superior charge-discharge cycle characteristic and a superior load characteristic. A cathode and an anode with a separator in between are spirally wound. The cathode comprises a cathode mixed layer containing a composite oxide including Li and at least one kind selected from the group consisting of Co, Ni, Mn and Fe. The anode comprises an anode mixed layer including tin-containing alloy powders and a carbon material. The tin-containing alloy powders are made of tin and an element except for alkali metal before first charge. A porosity of the anode mixed layer before the first charge is within a range from 25 vol % to 65 vol % inclusive. Thereby, even if a tin-containing alloy expands, enough pores as lithium-ion paths can be secured. Therefore, a superior charge-discharge cycle characteristic and a superior high load characteristic can be obtained.

REFERENCES:
patent: 2003/0099884 (2003-05-01), Chiang et al.
patent: 9-92277 (1997-04-01), None
patent: 10-223221 (1998-08-01), None
patent: 1999-242954 (1999-09-01), None
patent: 2000-173593 (2000-06-01), None
patent: 2001-118575 (2001-04-01), None
patent: WO2002/093412 (2002-03-01), None

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