Properties of electrolyte near rough electrodes: Capacity and impedance

The properties of the electric double layer (EDL) are essential for various fields of science and technological applications. In this short review, I discuss the publications devoted to investigating the behavior of electrolyte in contact with rough electrodes. Since the EDL is formed at the electrolyte-electrode interface, the surface geometry directly affects ion distributions. Key effects of rough electrodes are a significant increase in the accumulated charge; a change in the dependence of the differential capacitance on the applied potential; and a constant phase element contribution to the impedance. Finally, I highlight the limitations of existing approaches and suggest possible solutions for improvement.

Automated summary

The properties of the electric double layer (EDL) play a crucial role in various scientific and technological applications. This review focuses on publications that investigate electrolyte behavior in contact with rough electrodes. The surface geometry of the electrodes directly affects ion distributions, leading to key effects such as increased accumulated charge, changes in the dependence of differential capacitance on applied potential, and a constant phase element contribution to impedance. The review also highlights the limitations of current approaches and suggests potential solutions for improvement.