NASA Axes X-57 Maxwell Before First Flight - AVweb

This is a great list!

Some of these are fairly successful, in their space - thinking of Alisport Silent 2, LAK 17b FES, Lange Antares, Pipistrel Alpha Electro, Pipistrel Taurus, Schempp-Hirth Discus FES and Ventus FES and Arcus-E, Sunseeker Duo (it’s a one-off but it’s also an everyday-use aircraft) - all but one are sailplanes. A sailplane needs reliable starting - a key advantages of battery-driven powerplants - but doesn’t need that much energy. It’s also nice to avoid the noise of an ICE and the smell of fuel inside.

With today’s batteries, electric airplanes are very marginal, and electric rotorcraft make very little if any sense.