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New battery produces electricity where freshwater meets saltwater

The result was a so-called “mixing entropy battery.” Alternating the flow of river water and sea water through the battery produces electricity to charge it. The process also can be reversed to remove salt from ocean water to produce drinking water. The scientists describe the battery a very promising potential addition to the ranks of solar, wind, and other renewable energy, and are working on modifications to make the device a commercial reality.

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