Comparison of transmissive permeable and reflective impermeable interfaces between electrode and electrolyte

This article described the basic concepts of the permeable boundary (PB) and impermeable boundary (IPB) conditions between electrode and electrolyte that are essential in studying diffusion and migration of ions through the electrode for electrochemical devices. The transmission line models (TLMs) were introduced to explain the boundary conditions at the electrode/electrolyte interfaces. The impedance data were simulated based upon the TLMs for PB and IPB conditions, giving attention to the different behaviors of low-frequency impedance. In addition, this article explained that the electrodes used for fuel cells and batteries can be classified according to the PB and IPB conditions.