BBerson
Light Plane Philosopher
This 1980 Flying magazine article, (page 42) proposed an electric powered Beech Bonanza that would cruise at 30,000 feet. Using a tank of Hydrogen Peroxide (50% for safety) and lithium metal that would make DC power, but not a battery. The lithium would be recycled. Similar to an electric torpedo.
https://books.google.com/books?id=M...ce=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
https://books.google.com/books?id=M...ce=gbs_ge_summary_r&cad=0#v=onepage&q&f=false