This salt battery harvests osmotic vitality the place the river meets the ocean

Estuaries — the place freshwater rivers meet the salty sea — are nice places for birdwatching and kayaking. In these areas, waters containing completely different salt concentrations combine and could also be sources of sustainable, ‘blue’ osmotic vitality. Researchers report making a semipermeable membrane that harvests osmotic vitality from salt gradients and converts it to electrical energy. The brand new design had an output energy density greater than two instances greater than business membranes in lab demonstrations.