<Ul> <Li> Double - layer capacitance--electrostatic storage of the electrical energy achieved by separation of charge in a Helmholtz double layer at the interface between the surface of a conductor electrode and an electrolytic solution electrolyte . The separation of charge distance in a double - layer is on the order of a few Ångströms (0.3--0.8 nm) and is static in origin . </Li> <Li> Pseudocapacitance--Electrochemical storage of the electrical energy, achieved by redox reactions electrosorption or intercalation on the surface of the electrode by specifically adsorbed ions that results in a reversible faradaic charge - transfer on the electrode . </Li> </Ul> <Li> Double - layer capacitance--electrostatic storage of the electrical energy achieved by separation of charge in a Helmholtz double layer at the interface between the surface of a conductor electrode and an electrolytic solution electrolyte . The separation of charge distance in a double - layer is on the order of a few Ångströms (0.3--0.8 nm) and is static in origin . </Li> <Li> Pseudocapacitance--Electrochemical storage of the electrical energy, achieved by redox reactions electrosorption or intercalation on the surface of the electrode by specifically adsorbed ions that results in a reversible faradaic charge - transfer on the electrode . </Li> <P> Double - layer capacitance and pseudocapacitance both contribute inseparable to the total capacitance value of a supercapacitor . However, the ratio of the two can vary greatly, depending on the design of the electrodes and the composition of the electrolyte . Pseudocapacitance can increase the capacitance value by as much as a factor of ten over that of the double - layer by itself . </P>

Construction and working of electrochemical double layer capacitors