German Researchers Dope Graphite to Achieve Superconductivity at Near Room Temperature
Superconductors offer huge potential energy savings when used for electrical power transmission lines, for example, but until now have worked only at temperatures lower than about -110 °C…
Graphite, which consists of layers of carbon atoms arranged in hexagonal lattices, can superconduct when doped with elements that provide it with additional free electrons. Calcium graphite, for example, superconducts at up to 11.5 kelvin (about -260 °C), and theorists have predicted that temperatures of up to 60 kelvin could be reached if enough free electrons were available.
(via ‘Tantalizing’ hints of room-temperature superconductivity | KurzweilAI)