New Super Capacitors Provide a Big Energy Boost for Wearable Electronic Devices
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Compared with similar super capacitors using carbon nanotubes or other materials, the niobium yarns are stronger and 100 times more conductive, meaning that niobium-based super capacitors can store up to five times as much power in a given volume as carbon nanotube versions. In addition, the material is highly flexible and could be woven into fabrics, enabling wearable forms; individual niobium nanowires are just 140 nanometers in diameter—about one-thousandth the width of a human hair. Another advantage is that niobium is a fairly abundant and widely used material, which make the super capacitors inexpensive and easy to produce.