Ion engines do use fuel. The wiki page you linked to even lists the propellant types (https://en.wikipedia.org/wiki/Ion_thrus…) for example the Xenon Ion Propulsion System is used in many commercial satellites.
Hypercubed
hypercubed
Ion engines do use fuel. The wiki page you linked to even lists the propellant types (https://en.wikipedia.org/wiki/Ion_thrus…) for example the Xenon Ion Propulsion System is used in many commercial satellites.