fuel cells

Artificial gills unlock long-range underwater robots | What's good for fish may be good for robots, too, as researchers from the Helmholtz-Zentrum Hereon have developed an artificial gill that can extract oxygen from seawater to run fuel cells to power robotic sea gliders on long missions.

Hydrogen cars flopped, but fuel cells are finding new life in trucks and boats

MIT scientists have discovered a new way to produce hydrogen fuel, using just soda cans, seawater and coffee grounds | The team says the chemical reaction could be put to work powering engines or fuel cells in marine vehicles that suck in seawater.

Caffeine Makes Fuel Cells More Efficient, Cuts Cost of Energy Storage