Abstract
We have determined the diffusion coefficients and fluxes of sulfide and polysulfide species through Nafion membranes in order to correlate the physical properties of these membranes with their actual performance in three‐electrode photoelectrochemical storage cells. Diffusion coefficients for sulfide range from about , depending on the equivalent weight and thickness of the membrane, and the pH of the solution. Diffusion coefficients for polysulfide are considerably lower, and we discuss some reasons. A Nafion 315 membrane was chosen for the first test in the storage system and the results of the test are presented.
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