Zinc/air cell

Details Zinc/air cell Zinc/air cell

2005-10-28

2009-12-01

Yuan, Dah-Wei D (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S207000

Reexamination Certificate

active

07625672

ABSTRACT:
A zinc/air depolarized cell wherein the anode comprises zinc particles, aqueous alkaline electrolyte, and pyrophosphate based (P2O7)4−additive. The cell may be in the form of a button cell. The addition of a pyrophosphate containing additive to the zinc anode improves the cell's service life regardless of whether the zinc is amalgamated with mercury or contains zero added mercury. The pyrophosphate based on (P2O7) content preferably comprises between about 0.001 and 2 percent by weight of the anode.

REFERENCES:
patent: 3532552 (1970-10-01), Bernard et al.
patent: 3897265 (1975-07-01), Jaggard
patent: 5279905 (1994-01-01), Mansfield
patent: 6602629 (2003-08-01), Guo
patent: 6830847 (2004-12-01), Ramaswami
patent: 2003/0077512 (2003-04-01), Charkey et al.
patent: 2005/0003271 (2005-01-01), Jiang
patent: 2004 063345 (2004-02-01), None
patent: WO 03/034531 (2003-04-01), None
IPDL machine translation of JP 2004-063545.

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