PEIS should be conducted intermittently during measurements to detect any changes in 𝑅 𝑐𝑡 0 with time due to, for example, resistive heating or irreversible impedance growth. Secondly, while the values of α and I0 cannot be independently measured with PEIS, the direct measurement of 𝑅 𝑐𝑡 0 constrains the possible values of α and I0 based on Eq. 7. Specifically, by using the dimensionless notations for Rct and 𝑅 𝑐𝑡 ′ given, respectively, by Eqs. 13 and 21, α can be eliminated as an independent variable and the kinetics can be fully described in terms of 𝑅 𝑐𝑡 0 and I0. This allows for accurate analysis even for truncated datasets, which do not include significant data within the linear region. For these reasons, PEIS should always be conducted alongside the other methods for kinetic measurements at high current densities.