Pseudocapaciteit
Pseudocapacitance is a phenomenon observed in electrochemical energy storage devices, particularly supercapacitors, that exhibits characteristics of both batteries and conventional capacitors. Unlike electrostatic charge storage in electric double-layer capacitors (EDLCs), pseudocapacitance arises from fast, reversible faradaic (redox) reactions occurring at the surface or near-surface of electrode materials. These reactions involve the transfer of electrons and ions, leading to a higher energy density compared to EDLCs, which store charge purely through ion adsorption.
The key feature of pseudocapacitance is the rapid nature of these redox processes, allowing for high power
The capacitance value in pseudocapacitive materials is often dependent on the electrode potential, exhibiting a shape