Electrostatic energy-harvesting device having 3-dimensional cone shape

An electrostatic energy-harvesting device with a 3-dimensional cone shape, comprising:

• a first structure comprising
• a first substrate, and
• a first rubbing electrified body disposed on a first surface of the first substrate, the first substrate being in shape of a conical shell with a second surface and a hollow inside, the first surface being on an outside of the conical shell of the first substrate and the second surface being on an inside of the conical shell of the first substrate;
• a second structure comprising
• a second substrate having the same shape as the first substrate, and having a third surface and a fourth surface, and
• a second rubbing electrified body which includes a material having opposite electrification characteristics to the first rubbing electrified body and is disposed on the fourth surface of the second substrate and is configured to face an outside surface of the first rubbing electrified body, wherein the third surface is on an outside of the second substrate and the fourth surface is on an inside of the second substrate;
• and
• leader lines connected to each of the first rubbing electrified body and the second rubbing electrified body,
• wherein the second structure overlaps the first structure and is stacked on the first structure, triboelectricity is generated by contact therebetween, and electrostatic induction is generated by separation thereof.