 
 <prompt> Wetin be di features wey di supercapacitor wey dem invent get? Based on di last question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: "Last but not least the electric double-layer capacitor (now Supercapacitors) were invented. In 1957 H. Becker developed a "Low voltage electrolytic capacitor with porous carbon electrodes". He believed say the energy dey stored as charge inside the carbon pores wey he use for hin capacitor like how e dey inside the pores of the etched foils of electrolytic capacitors. Because the double layer mechanism no dey known by am that time, he write for the patent: "It is not known exactly wetin dey happen for inside the component if e dey used for energy storage, but e dey lead to an extremely high capacity."." 