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News Link • Science, Medicine and Technology

New geothermal battery directly converts heat to electricity

• arclein

Most geothermal systems work using water heated by hot rocks a few kilometers below the Earth's surface. That water is either naturally present and pumped to the surface, or pumped down, heated and pumped back up. Such systems often need high temperatures, over 180° C (356° F), to work, and don't necessarily scale up that well. But the Japanese researchers behind the new study say they've got a more direct method. Their design is made up of sensitized thermal cells (STCs), which are able to generate electricity at temperatures below 100° C (212° F) without needing a middle-ground carrier like water or steam.

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