Can a DRT model be used for electrolytic diffusion?

To develop the model which can be used to derive the DRT expressions for the electrolytic diffusion, an analytical solution is a prerequisite. Sikha et al. developed an analytical solution for the impedance of a LIB and managed to simulate the cell impedance with physicochemical parameters , .

How do you determine a dimensionless diffusion dynamic?

To better observe the diffusion dynamic, we therefore propose to divide the transient overvoltage obtained by the estimated value of the quasi-steady-state overvoltage. This gives a dimensionless signal, whose value is between 0 and 1, and which is defined by Eq. (9).

Can a physics-based impedance model interpret the DRT spectrum?

In this work, we will try to develop a theory that can be used to interpret the DRT spectrum regarding the liquid and solid phase diffusion processes with a physics-based impedance model, a comparison of the method proposed in the present work with the existing methods is given in Table 1.

How does size affect the diffusion part of the impedance curve?

In practice, the particles in the electrode have a certain size distribution, which has a significant influence on the diffusion part of the impedance curve and cannot be neglected . In this work, we will try to approximate the analytical DRT spectrum when the PSD is taken into account.

How is a battery model compared to a classical approach?

It is compared to classical approaches to demonstrate its robustness. The modeling of a battery by an equivalent circuit model requires the determination of its parameters. This determination can be done by exploiting the transient response of a battery to a current pulse (often called GITT: Galvanostatic intermittent titration technique).

Can a solid phase diffusivity be underestimated if electrolytic diffusion is non-negligible?

In such a case, the solid phase diffusivity may be underestimated if the overpotential caused by the liquid diffusion is non-negligible when compared to that caused by the solid diffusion. To exclude the influence of the electrolytic diffusion, Kang et al. developed an improved GITT method by preparing a high-density bulk sample .