Fig. 4.

Streaming potential coefficient ($\upsilon$) calculated from the phenomenological transport coefficients for different immobile charge densities ($\tilde{X}$) and pore radii ($r_{\mathrm{p}}$). The phenomenological transport coefficients were determined using two different models; a) the Space charge (SC) and b) Uniform potential (UP), and plotted as function of the external LiI/I₂ concentration $(c_{\mathrm{ext}})$. The experimentally determined streaming potential coefficients are represented by the solid symbols.