It isn't a new idea. In fact, it has been produced commercially more than 20 years ago:
Continental Emitec GmbH
Even so, there's a bunch of recent patents:
https://scholar.google.nl/scholar?q=...=1&oi=scholart
One relatively readable scientific publication:
https://pure.tue.nl/ws/files/3268429/Metis237278.pdf
Then there is...
Couldn't resist 
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gigameter or 0.13 Megamile.
For confirmation go to people just like you.
For education go to people unlike yourself.
Last edited by RedDevil; 05-25-2018 at 03:38 PM..
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