SMRTR Science & EngineeringFeb 12, 2026Interesting Engineering

Sunlight-storing biomolecule releases heat on demand, beats lithium-ion batteries

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UC Santa Barbara chemists developed pyrimidone, a molecule that stores sunlight in chemical bonds for years and releases it as heat on demand. With 1.6 megajoules per kilogram energy density, it could enable off-grid heating applications.

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