Method of manufacturing a lithium battery

Details Method of manufacturing a lithium battery Method of manufacturing a lithium battery

1996-08-07

1997-05-27

Maples, John S.

Metal working

Method of mechanical manufacture

Electrical device making

429194, H01M 1038

Patent

active

056327846

ABSTRACT:
A method of predischarging a novel battery wherein a stable lithiated film is formed at an anode by a small amount of the discharged capacity in order to rapidly recover the open circuit voltage of the battery, is disclosed. The battery includes a cathode using lithium metal as an active material, an anode using manganese dioxide as a main component of an active material, and an electrolyte including an inorganic electrolyte dissolved in a nonaqueous solvent containing at least propylene carbonate. The battery is predischarged by using a pulse current. The amount of discharge is not more than about 2% of the total discharge capacity. A lithiated film which is formed at the anode portion while being partially oxidized to lithium ions, is uniformed. By a small amount of the discharged capacity, a high potential portion can be removed and the gas generation reaction can be suppressed. In addition, the life of the battery is lengthened and the flatness of the battery's voltage is improved.

REFERENCES:
patent: 5370710 (1994-12-01), Nagamura et al.

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