Dry cells

Details Dry cells Dry cells

1977-12-30

1980-12-23

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429224, 429229, 429232, H01M 606

Patent

active

RE0304581

ABSTRACT:
A dry cell comprising a zinc anode, a depolarizing mix and a separator which functions to separate the anode from the depolarizing mix, said depolarizing mix containing manganese dioxide as its main component and acetylene black immersed in an electrolyte having zinc chloride as its main ingredient, said depolarizing mix containing water and chlorine in an amount of about 50 to 90 parts by weight and about 5.5 to 14.5 parts by weight, respectively, per 100 parts by weight of manganese dioxide, the chlorine being present in the form of said zinc chloride or zinc chloride with added hydrochloric acid; said depolarizing mix also containing said electrolyte in an amount in millimeters determined by multiplying the BET total surface area of manganese dioxide and acetylene black in m.sup.2 /gram by a value of about 0.008 to 0.015, and said depolarizing mix further containing the electrolyte in an amount of about 2 to 4 ml. per gram of acetylene black.

REFERENCES:
patent: 1292764 (1919-01-01), Hambuechen
patent: 3019141 (1962-01-01), Priebe
patent: 3098771 (1963-07-01), Huber
patent: 3428494 (1969-02-01), Watanabe et al.
patent: 3440104 (1969-04-01), Huber
patent: 3795545 (1974-03-01), Kamai
patent: 3888699 (1975-06-01), Urry
patent: 3892591 (1975-07-01), Uetani et al.

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