Much like a mechanical coil spring, twisting carbon nanotubes also stores energy, which can be released later.
A collaboration of researchers from Japan and the US has demonstrated how twisted carbon nanotubes can store up to three times more energy than standard lithium-ion batteries. The research could pave the way for new-age implants and sensors that are lightweight, compact, and, more importantly, safe.
As a researcher at Japan’s Shinshu University, Sanjeev Kumar Ujjain wanted to know if carbon nanotubes could also be used to store energy. In 2022, he moved from Japan to the University of Maryland Baltimore County , where he continued his research and found that twisting carbon nanotubes improves their energy storage efficiency. Long before disposable batteries started powering children’s toys, there was the iconic mechanical coil spring.
Comparisons of gigantic nanomechanical energy storage show that carbon nanotubes are better than lithium-ion batteries and short of TNT and fossil fuels. Image credit:The researchers found that their twisted carbon nanotubes could hold 15,000 times more energy than steel springs per unit mass. While this is commendable, the researchers knew that their biggest competitor was lithium-ion batteries, the highest energy-density device built by humanity.
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