The first CubeSat with a Hall-effect thruster has gone to space

Student-led teams aren't the only ones testing out novel electric propulsion techniques recently. Back in November, a company called Exotrail successfully tested a completely new kind of electric propulsion system in space—a small Hall-effect thruster.

source https://phys.org/news/2021-01-cubesat-hall-effect-thruster-space.html