Alkaline secondary electrochemical generators with a zinc anode

Details Alkaline secondary electrochemical generators with a zinc anode Alkaline secondary electrochemical generators with a zinc anode

2007-11-27

2007-11-27

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S231000, C429S218100, C429S206000, C252S182100

Reexamination Certificate

active

10770771

ABSTRACT:
The invention relates to secondary alkaline electrochemical generators with a zinc anode in an electrolyte, the active mass of said anode comprising at least one conductive ceramic. According to the invention, the electrolyte of the generator is made up of a highly-concentrated alkaline solution and/or the active mass of the zinc anode contains an additive comprising at least one alkaline titanate having general formula (M2O)n(Ti)2)mxH2O, wherein M denotes Li, Na, K, Rb or Cs, n being between 0.5 and 2, m being between 1 and 10 and x being between 0 and 10, or alkaline earth having general formula (MO)n(TiO2)mxH2O, wherein M denotes Mg, Ca, Sr or Ba, n being between 1 and 5, m being between 1 and 10 and x being between 0 and 10. The invention also relates to the zinc anode of the generators used in the invention and the production method thereof.

REFERENCES:
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patent: 3476601 (1969-11-01), Berger et al.
patent: 4041221 (1977-08-01), Berchielli et al.
patent: 4332871 (1982-06-01), Charkey
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patent: WO 00/79622 (2000-12-01), None
19 Pages, K Bass et al article entitled “Methods for the Reduction of Shape Change and Dendritic Growth in Zinc-Based Secondary Cells” from Journal of Power Sources, vol. 35, No. 3 (1991).
20 Pages, Frank R. McLarnon et al article entitled “The Secondary Alkaline Zinc Electrode” from 1046 Journal of the Electrochemical Society 138 Feb. (1990) No. 2, Manchester, NY.

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