Non-aqueous electrolyte secondary battery
AssigneeNikkiso Co., Ltd.
InventorsTakashi Ohsaki, Hiroshi Abe, Takeji Murai
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Abstract
The present invention relates to a non-aqueous electrolyte secondary battery. The graphitized vapor-grown carbon fibers used as an anode in the present invention have a specific surface area of at most 5 m.sup.2 /g and an average aspect ratio of 2-30. The non-aqueous electrolyte secondary battery comprises an anode comprising a cathode comprising a lithium-containing complex oxide, an anode comprising the graphitized vapor-grown carbon fibers, and an electrolyte comprising a lithium salt and a solvent. The present invention provides a non-aqueous electrolyte secondary battery having a high capacity maintained over a broad temperature range, good cycle characteristics, a high safety and an improved load characteristics.
Claims20
A non-aqueous electrolyte secondary battery which comprises:
- an anode comprising a pressed compact of graphitized vapor-grown carbon fibers having a specific surface area of at most 5 m.sup.2 /g and an average aspect ratio of 2-30, said compact having a packing density of 1.2-2.0 g/cm.sup.3 ;
- a cathode comprising a lithium-containing complex oxide;
- and
- an electrolyte comprising a mixed solvent of a cyclic carbonate and a linear carbonate including a lithium salt dissolved therein.
A non-aqueous electrolyte secondary battery which comprises:
- an anode formed from graphitized vapor-grown carbon fibers having a specific surface area of at most 5 m.sup.2 /g and an average aspect ratio of 2-30;
- a cathode comprising a lithium-containing complex oxide;
- and
- an electrolyte comprising a mixed solvent of a cyclic carbonate and a linear carbonate containing a lithium salt dissolved therein,
- wherein the designed capacity of said anode being greater than that of said cathode.
Dependencies are inferred from the claim text.