Yes, with solar panels. No mass is expelled, which is why there's so many claims about it violating the law of Conservation of Moment.
> Going by these experiments the EmDrive doesn't have a hope of ever matching the mass efficiency of an ion drive.
If the craft runs out of ions to throw really fast behind it, how could it get more? Well, it can't. That's why the EmDrive is a paradigm shift; solar panels allow for the generation of electricity, which then powers a magnetron to create thrust.
And efficiency? Well, ion drives presumably have decades of head-start. Give it time.
The future of manned space flight is almost certainly nuclear and it looks like tiny cabins attached to giant passive heatsinks or spacecraft that constantly have to accelerate just to dump all the waste heat and avoid cooking its inhabitants.
Here is some declassified test footage of Project Orion. I don't believe any of the test crafts used nuclear explosions, but you'll get the idea from this footage (on why it's a terrible idea that could only exist in the 40s or 50s)
In "peacetime" it could never launch from the ground, but assembled in space it could be fruitful. It's probably the only possible way to get a city of people off the planet.