Double-Layer Supercapacitors versus Batteries

The two distinct methods for achieving electrochemical energy storage and conversion are (1) using double-layer supercapacitors to directly store the energy (charge) in an electrode-electrolyte solution interface and then 

Comparison of Relative Properties of Batteries and Electrochemical Double-Layer Supercapacitors 

Property Battery Electrochemical Double-Layer Supercapacitor 

the charge and discharge times of supercapacitors are much shorter than the times for batteries. As discussed earlier, the physical charge separation and combination processes in a supercapacitor should be much faster than the electrochemical oxidation-reduction steps in a battery. 

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