Dubbellaagcapaciteit

Dubbellaagcapaciteit refers to the electrical capacitance that arises at the interface between a solid electrode and an electrolyte solution. This phenomenon is a fundamental aspect of electrochemistry and plays a crucial role in various electrochemical processes and devices. When an electrode is immersed in an electrolyte, ions from the solution migrate towards the electrode surface to neutralize any charge that may be present. This migration of ions forms a layer of charge on the electrode surface, which is then compensated by an oppositely charged layer of ions in the electrolyte, forming a compact ionic layer adjacent to the electrode. Further away from the electrode, a more diffuse distribution of ions exists. This arrangement of charged layers at the electrode-electrolyte interface resembles a parallel-plate capacitor, hence the term "dubbellaagcapaciteit" or double-layer capacitance. The capacitance value is dependent on factors such as the electrode material, the electrolyte composition, temperature, and the applied potential. Understanding and quantifying dubbellaagcapaciteit is essential for applications like batteries, supercapacitors, sensors, and corrosion studies. It influences the rate of electrochemical reactions, the efficiency of energy storage, and the detection limits of electrochemical sensors.