Wide Bandwidth High-Power Triboelectric Energy Harvesting by Scotch Tape (pubs.acs.org)

There have been people showing how to make and operate these in various forms on youtube for a few years. Here's a guide on how to do it at home: https://www.youtube.com/watch?v=nKjTlYP3cRQ

Related: the infamous 3M static electric force field

https://news.ycombinator.com/item?id=3274335

This reminds me of the duct tape X-ray source.