Lithium rechargeable battery

Details Lithium rechargeable battery Lithium rechargeable battery

2006-05-30

2006-05-30

Cantelmo, Gregg (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S217000, C429S245000

Reexamination Certificate

active

07052803

ABSTRACT:
The present invention provides a lithium rechargeable battery including a negative electrode comprising a copper core material, to which is fixed an active material made by mixing artificial graphite particles A obtained by kneading and granulating a base material of pulverized bulk mesophase pitch with pitch in a softened state and/or thermosetting resin, carbonizing the resulting granules at 700 to 1,500° C. and graphitizing the carbonized granules at 2,500 to 3,000° C. with spherical graphite particles B having a high mean circularity, with a view to inhibiting the deterioration in battery capacity through the repeated charge/discharge cycles, which occurs remarkably in a high energy density lithium rechargeable battery, and providing excellent discharge characteristic and safety.

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