| 摘要 |
A composite gas diffusion electrode has an electrically conductive porous substrate, non-noble metal catalytic material impregnated into the substrate, at least one chemically inert porous separator positioned adjacent one surface of the catalytically impregnated substrate, and a porous, electrically conductive sheet positioned adjacent the opposite surface of the separator and in electrical contact with the substrate, the porous sheet having a lower oxygen overvoltage than the substrate. During the charging of a cell employing the above electrode, the porous sheet provides isolation of oxygen gassing at the porous sheet while the porous separator provides physical spacing of the oxygen gassing at the porous sheet from the catalytically impregnated substrate.
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