by Briton Lee
Scientists have been searching for a way to make batteries hold longer charges, on both a commercial and industrial scale. South Korean researchers have made headway in this development, creating a form of 3D graphene “pom-poms” that have a much more efficient energy capacitance than normal graphene.
Graphene can be used as a supercapacitor due to its stability, high conductivity, and large surface area. 3D graphene capacitors are even better because their greater surface area enhances their capacitance. Graphene capacitors are relatively simple, with a carbon-only structure, and versatile enough to incorporate into batteries as electrodes. However, current ways of manufacturing graphene electrodes yield thin films that may stack and aggregate, which decreases surface area and makes the resulting material more difficult to process. These issues have led to the development of graphene foams and aerogels, but these can’t be used as electrodes because they’re too irregular and not as carbon-dense. Thus, scientists are currently looking to develop ways to create 3D carbon nanostructures for potential use as battery electrodes. Continue reading