Electrochemical membranes

  • Semipermeable membranes

    • Selective permeation
    • Allows recharging without e.g. cation intermixing
    • adds resistance

  • Solid electrolyte membranes

    • E.g. Y-stabilized ZrO\(_2\)(YSZ)
    • Selective transport
    • \(\mathrm{O}_{2}(g)+4 \mathrm{e}^{-}(P t) \rightleftarrows 2 \mathrm{O}^{2-}\left(Z r O_{2}\right) \quad \Delta E_{\mathrm{n}}=\frac{R T}{4 F} \ln \left\{\frac{p_{\mathrm{O}_{2}}^{\mathrm{L}}}{p_{\mathrm{O}_{2}}^{\mathrm{R}}}\right\}\)
    • Proton conducting solids. Other ions?
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