I’m not sure if there is a moving part to this or not, still very cool.
The first membraneless alkaline fuel cell has been built by exploiting the way liquids do not mix in ultra-narrow channels. It could offer cheaper and more efficient fuel cells.
Doing away with membranes not only simplifies a fuel cell’s design, it has also enabled the first alkaline fuel cells to be built. These could potentially be 40% more efficient than the acidic units used today, says Paul Kenis of the University of Illinois at Urbana Champaign, Illinois, US, who has developed the system.
First membrane-free alkaline fuel cell built
(Thank you special agent Greg for this information)