This is a very exciting field, more specifically in combination with asymmetric capacitors.
Exodus Propulsion [0] under NASA’s lead scientist of electrostatics, Dr Charles Buhler and his team have been observing some very puzzling and exciting results. Would recommend anyone interested in this to check this out.
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https://www.exoduspropulsion.space
As far as I know they are still trying to piece together the underlying physics, but they are 10 years in and 1000s of experiments later, some of which has been reproduced.