Battery

Details Battery Battery

2008-07-15

2008-07-15

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S231600, C429S231950, C429S231900

Reexamination Certificate

active

10919949

ABSTRACT:
Provided is a battery capable of improving charge-discharge cycle characteristics. The battery comprises a spirally wound electrode body in which a cathode and an anode are spirally wound with a separator in between. The capacity of the anode includes a capacity component by insertion and extraction of Li and a capacity component by precipitation and dissolution of Li metal, and is represented by the sum of them. Moreover, the anode includes a carbon material capable of obtaining a first peak within a range from 1580 cm−1to 1620 cm−1and a second peak within a range of 1350 cm−1to 1370 cm−1in a Raman spectrum analysis using argon laser light with a wavelength of 5145 nm, and having an intensity ratio IB/IA between the first peak and the second peak of 0.25 to 0.6, where the intensity of the first peak is IA and the intensity of the second peak is IB. Thereby, precipitation-dissolution efficiency of lithium metal and charge-discharge cycle characteristics can be improved.

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