Highcapacitance
High capacitance refers to capacitors that can store a large amount of electric charge at a given voltage, or capacitors that maintain high capacitance in compact form factors. Capacitance C is defined as the ratio of stored charge Q to voltage V, and energy U = 0.5 C V^2. High capacitance is achieved by maximizing electrode surface area, maximizing dielectric constant, and minimizing the effective separation of charge. This can be done with porous, high-surface-area electrodes; thin, high-permittivity dielectrics; or electrolyte-based configurations that create electric double layers or promote fast redox reactions (pseudocapacitance).
Categories include conventional capacitors such as electrolytics and high-permittivity ceramics, which reach tens to hundreds of
Key performance parameters include equivalent series resistance (ESR), leakage current, temperature stability, voltage rating, and cycle
Applications for high-capacitance devices span power smoothing and backup power in electronics, grid stabilization and energy