Nonaqueous electrolyte secondary battery

Details Nonaqueous electrolyte secondary battery Nonaqueous electrolyte secondary battery

1997-05-29

1999-08-17

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429221, 4292315, 4292319, H01M 458

Patent

active

059392240

ABSTRACT:
The invention provides a nonaqueous electrolyte secondary battery which employs, as a negative electrode active material, a carbide containing an alkali metal in a charged stage. The carbide used is an ionic bond type carbide, a covalent bond type carbide, or an intermetallic compound type carbide. The ionic bond type carbide is exemplified as Na.sub.2 C.sub.2, K.sub.2 C.sub.2, Cu.sub.2 C.sub.2, VC.sub.2, and the like. The covalent bond type carbide is exemplified as Cr.sub.4 C, and the like. The intermetallic compound type carbide is exemplified as Mn.sub.3 C, Mn.sub.23 C.sub.6, Mn.sub.7 C.sub.3, Fe.sub.2 C, FeC, Ni.sub.3 C, and the like. A highly reliable nonaqueous electrolyte secondary battery with a high energy density and excellent cycle life characteristics can be obtained.

REFERENCES:
patent: 5229226 (1993-07-01), Bito et al.
patent: 5358805 (1994-10-01), Fujimoto et al.

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