Chemistry: electrical current producing apparatus – product – and – Sealed cell having gas prevention or elimation means – Prevention or elimination means is one of the cell...
Patent
1990-08-17
1992-07-07
McFarlane, Anthony
Chemistry: electrical current producing apparatus, product, and
Sealed cell having gas prevention or elimation means
Prevention or elimination means is one of the cell...
429 57, 502101, H01M 424
Patent
active
051282194
ABSTRACT:
In a metal oxide/hydrogen storage battery, preferably formed as a coiled cell or as a button cell, having a negative electrode, a positive electrode, and an intermediate separator, the oxidation-sensitive negative electrode is protected against diffusing oxygen by a metallic covering of the electrode's metal hydride particles, and the oxygen reduction necessary for gas-tight operation is transferred to an auxiliary electrode which is arranged outside of the ionic path between the positive and negative electrodes. Metals with high solubility for hydrogen, such as Pd, Ni and Cu, are suitable as the covering material. The auxiliary electrode is formed as a film based on a mixture of activated carbon, a PTFE binder and conducting graphite, and is either laminated onto the negative metal hydride electrode or is spatially separated from the main electrodes, depending upon the cell's overall construction.
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Hofmann Gunter
Kohler Uwe
Simon Gerhard
McFarlane Anthony
Varta Batterie Aktiengesellschaft
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