There's a misconception that "electricity" is invariably made of negatively-charged particles called electrons. This error also leads people to wrongly imagine that electric currents are always a flow of negative particles. Actually, in some situations electric currents can really be a flow of positive particles. In other situations the flows are negative particles. And sometimes they're both positive and negative flowing at once, but in opposite directions. The true direction of the flowing particles depends on the type of conductor.