Alkaline cell with improved cathode

Details Alkaline cell with improved cathode Alkaline cell with improved cathode

H - Electricity

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M

H01M 4/50 (2006.01) H01M 4/06 (2006.01) H01M 4/08 (2006.01) H01M 4/24 (2006.01) H01M 4/30 (2006.01) H01M 6/06 (2006.01) H01M 6/08 (2006.01) H01M 10/34 (2006.01)

Patent

CA 2350945

An alkaline cell (10) is disclosed having a cathode (12) comprising manganese dioxide wherein the cathode (12) is a semisolid during discharge of the cell. The cell (10) may have an anode (50) comprising zinc and an electrolyte comprising potassium hydroxide. The semisolid cathode (12) comprising manganese dioxide may be in the form of a putty or paste. The semisolid cathode (12) reduces cathode polarization effects and results in increased manganese dioxide utilization (Amp-hr/g), particularly at high current drain, between about 0.5 and 2 Amp.

L'invention concerne une pile alcaline (10) dotée d'une cathode (12) comprenant du dioxyde de manganèse et consistant en un semi-solide lors de la décharge de la pile. La pile (10) peut comporter une anode (50) comprenant du zinc ainsi qu'un électrolyte comprenant de l'hydroxyde de potassium. La cathode semi-solide (12) comprenant du dioxyde de manganèse peut revêtir la forme d'un mastic ou d'une pâte, et elle réduit les effets de polarisation, avec pour conséquence une utilisation accrue de dioxyde de manganèse (Amp-h/g), notamment à une intensité élevée de courant, entre environ 0,5 et 2 ampères.

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