It is possible that by using cabbage water and micropore film you can produce electricity. Did I dream this?

Question

A few years ago I think I saw a schools program presumably about ion pumps and they demonstrated how it works with cabbage water and lit up a small lightbulb.. but I am prone to very strange dreams, so i've quick browsed the net but nothing. and then i thought wow this is a job for all the clever people on the big Y A..

i think i meant semi-permeable membrane
like in a cell wall in osmosis etc........it was to do with chlorophyl actually producing free electrons.... just cant remember details

Answer 1

Perhaps, in principal it is similar to a potato battery. See link below.
If you wonder what they did with a micropore film I have no clue. Micropore can serve a filter membrane, but how it will function in an electrochemical setting I wonder.