Cement supercapacitor 2 (IMAGE)
Caption
MIT engineers have created a “supercapacitor” made of ancient, abundant materials, that can store large amounts of energy. Made of just cement, water, and carbon black (which resembles powdered charcoal), the device could form the basis for inexpensive systems that store intermittently renewable energy, such as solar or wind energy.
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Image courtesy of Franz-Josef Ulm, Admir Masic, and Yang-Shao Horn
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