A battery works by storing an electrical charge through electrochemical reaction. But that’s not the only way to store electricity. Charge storage in supercapacitors can be accomplished by one or both of two methods. In electrical double layer capacitance (EDLC), a charge is stored between two plates due to electrostatic separation of electronic and ionic charges at the electrode-electrolyte interface. More recently, a second type of supercapacitor has been developed using a principal called...
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