Overchargeable sealed metal oxide/lanthanum nickel hydride...

Details Overchargeable sealed metal oxide/lanthanum nickel hydride... Overchargeable sealed metal oxide/lanthanum nickel hydride...

H - Electricity

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M

319/45

H01M 10/02 (2006.01) H01M 10/34 (2006.01)

Patent

CA 1108691

OVERCHARGEABLE SEALED METAL OXIDE/LANTHANUM NICKEL HYDRIDE BATTERY ABSTRACT OF THE DISCLOSURE This invention relates to improvements in the construc- tion of metal oxide/lanthanum nickel hydride storage batteries. A stack construction is disclosed which allows recombination of oxygen before it reaches the hydride elec- trode. The oxygen gas is forced to escape from the back of the metal oxide electrode where it is reduced at a catalyst electrode held at the potential of the lanthanum nickel electrode. With rapid recombination, no build-up of pres- sure occurs and no oxygen gas will arrive at the hydride electrode which would tend to damage it. In one embodiment, the hydride electrode is separated from the metal oxide electrode by a fuel cell-type separator. In one embodiment, a single oxygen reduction electrode is placed between two back-to-back metal oxide electrodes, and the reduction elec- trode is connected to the two common leads to the hydride electrodes. In a second embodiment, the reduction elec- trodes are pressed against or attached to the hydride electrodes.

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