Fig. 7: Impedance theory of the eSCM method. | npj Computational Materials

Fig. 7: Impedance theory of the eSCM method.

From: The electrode tortuosity factor: why the conventional tortuosity factor is not well suited for quantifying transport in porous Li-ion battery electrodes and what to use instead

Fig. 7

a An ideal impedance response of a porous electrode in blocking condition (no faradaic process so \({\it{\tilde z}}_{\rm{t}}\) becomes \({\it{c}}_{{\rm{dl}}}\) which is the pure capacitance of the double layer) along with the fit using the TLM represented in b, which allows the determination of \(\uptau _{\mathrm{e}}\). Here, since only the impedance of the single electrode is considered, the contribution of the ionic resistance from the separator is not represented in the TLM as well as does not appear in the EIS spectra. The dashed line is used to highlight the 45° slope of the medium frequency region.

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