Method for making oxygen electrode for alkaline galvanic cells

Details Method for making oxygen electrode for alkaline galvanic cells Method for making oxygen electrode for alkaline galvanic cells

1985-11-27

1987-02-17

Bell, Jr., Houston S.

Fluent material handling, with receiver or receiver coacting mea

Processes

Battery grid pasting

429 27, 429 42, H01M 421, B65B 304

Patent

active

046432353

ABSTRACT:
An oxygen electrode for alkaline galvanic cells. The electrode includes a talyst-containing carbon layer, a current collector, and a preferably foil-like separator for separating a liquid chamber from a gas chamber in such a way that the gas can pass to the carbon layer but the liquid cannot enter the gas chamber. The electrode has a structurally simple construction as a multi-layer, gas diffusion electrode, the current density of which, in the temperature range of between approximately 20.degree. and 80.degree. C., is approximately 350 mA/cm.sup.2 during operation with air, and greater than 1 A/cm.sup.2 during operation with oxygen. The current collector includes a metal grid which is at least partially embedded in a carbon layer. In the method of producing such an oxygen electrode, a catalyst salt solution is mixed with an aqueous activated carbon suspension and is deposited onto the activated carbon to form a catalyst dispersion. Subsequently, the liquid is separated off to form a catalyst composition, and the metal grid is embedded at least partially in this catalyst composition.

REFERENCES:
patent: 3600230 (1971-08-01), Stachurski et al.
patent: 4341848 (1982-07-01), Liu et al.

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