Can someone explain how carbon nanotube batteries work? They are carbon nanotubes put on a layer then and covered in an electrolyte such as lithium. These batteries are able to hold 5 times more electricity than a conventional battery. I looked up batteries using carbon and not carbon nanotubes as the electrodes for an ultracapacitor. Carbon nanotubes are just a more efficient version. What I do not understand is how does carbon actually hold a charge? Can the carbon nanotube version be explained too? I'm looking for an answer in layman's terms.