Development of the Zinc-Chlorine Battery for Utility

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Development of the Zinc-Chlorine Battery for Utility ( development-zinc-chlorine-battery-utility )

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10fT Figure ^ Anodic and cathodic Tafel polarizations of zinc electrode in various ZnClj and 1 M KC1 solutions to = 3,000 rpm. Area of zinc electrode 0.752 cm2. The obtained exchange current densities and anodic and cathodic Tafel slopes are summarized in Table 1. The theoretical cathodic Tafel slope is b = c -[2.3RT/(l-$ )nF]. If a symmetric transfer coefficient 3 = 0.5 and one electron transfer n = 1.0 are assumed, then the Tafel slope is = -120 mV. The obtained experimental cathodic Tafel slopes (see Table 1) are in agreement and the theo­ retical value. Sierra Alcazar and Harrison [6] measured a Tafel slope of 120 mV using an AC impedance technique. A-ll i Cmfl/Cm2)

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