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This bright blue dye is found in fabric: Could it also power batteries? A component of wastewater in textile-making  is good at tasks associated with energy storage

This bright blue dye is found in fabric: Could it also power batteries? A component of wastewater in textile-making is good at tasks associated with energy storage

Methylene blue is a common ingredient in wastewater from textile mills. But scientists think it may be possible to give this industrial pollutant a second life. In a study, they show that the dye, dissolved in water, is good at storing and releasing energy on cue. This makes the compound a promising material for redox flow batteries, which could store energy for wind farms and solar homes.

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