H - Electricity – 01 – M
Patent
H - Electricity
01
M
319/124
H01M 6/02 (2006.01) H01M 4/06 (2006.01) H01M 6/06 (2006.01)
Patent
CA 1090880
ABSTRACT OF THE DISCLOSURE: The invention relates to an alkaline primary battery of the type having a negative electrode containing cadmium or amal- gamated zinc and a positive electrode containing monovalent silver oxide, mercuric oxide, or mixtures of these oxides with manganese dioxide, the positive electrode having an electrochemically active surface area facing the negative electrode. At positive electrodes, self-discharge can be caused by the solubility of the active mate- rial. The alkaline primary battery of the invention is designed to reduce this type of self-discharge, without impairing the in- ternal resistance of the battery and, to this end, comprises at least one electrically conductive, microporous, electrolyte- saturated, optically opaque filter-electrode which covers the entire electrochemically active surface area of the positive elec- trode, the filter electrode either containing no monovalent silver oxide and no mercuric oxide, or containing at most a substantially smaller amount of the oxides per unit volume than the positive electrode; the filter electrode contains as principal constituent electrically conducting material which is not corroded, oxidized or dissolved in alkaline electrolytes at the given potential of the positive electrode, and is in electrical contact with the positive electrode.
277152
Leclanche S.a.
Robic Robic & Associes/associates
LandOfFree
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