Rovcal, Inc.

David R Mihara

Ernest Ndzebet

William C Bushong

Viet H Vu

Gregory James Davidson

Gregory Scott Moy

Jeffrey A Poirier

Miguel E Armacanqui

A sulfonic acid type organic surfactant is incorporated into the gelled anode mixture of an alkaline electrochemical cell, optionally with an organic phosphate ester surfactant. Zinc fines may also be incorporated into the anode. The electrolyte included in the anode mixture may have a reduced hydroxide concentration. When a cell is provided whose anode mixture includes the two surfactants and zinc fines alone or in combination with a lowered hydroxide concentration in the electrolyte, discharge leakage is reduced and gel gassing is suppressed relative to that of gels lacking both surfactants. Additionally, cell discharge performance is improved relative to that of cells lacking both the zinc fines and lowered hydroxide concentration.

Alkaline cell with performance enhancing additives

An electrochemical cell is presented having a gasket that is sealed against the container to prevent electrolyte leakage during normal operation. When the internal pressure of the cell reaches a predetermined threshold, the seal is removed, thereby permitting electrolyte to escape through a vent.

Vent for cylindrical electrochemical batteries

Growing community of inventors

Madison, WI, United States of America

David R Mihara