hugo_faurand

Hello everyone ! I'm Hugo. I'm a french high school student. This year I've a project on new way to store electricity and their materials.I've done researches on super capacitors. But I've found only that "new way" to store electric energy. And for the material part, I don't know what I can search. So, could you help me ? Do you know other way to store electric energy except battery and super capacitor ? And could you tell me things like how materials are chosen for battery, why a material is a good conductor... ? Thanks in advance. Hugo