Scientists Roll MXene Into Tubes That Boost Battery Power

Scientists at Drexel University just turned flat sheets of super-thin material into powerful tubes that could make your next phone battery charge faster and last longer.

The breakthrough involves MXene, a conductive nanomaterial discovered 15 years ago. Researchers figured out how to roll these flat sheets into hollow tubes called nanoscrolls, each about 100 times thinner than a human hair.

The shape matters more than you'd think. When MXene flakes stack flat like pancakes, ions struggle to squeeze between the layers. But when rolled into tubes, they create open highways for ions to zoom through with almost no resistance.

"It's like comparing steel sheets to metal pipes," explained Yury Gogotsi, who led the research published in Advanced Materials. Your car needs flat sheets for the body, but you need pipes to move water efficiently.

The team cracked a problem that stumped other scientists. They used water to create chemical changes that made the flat layers naturally want to curl up. This triggered internal strain that peeled the layers apart and rolled them into tight scrolls.

The method worked on six different types of MXene materials. The researchers produced 10 grams of nanoscrolls at a time, proving the technique works at useful scales, not just in tiny lab samples.

The scrolls conduct electricity better than flat MXene and make materials stronger when mixed into plastics or metals. Their open structure also helps sensors detect molecules that would normally get trapped between flat layers.

The Ripple Effect

This discovery could touch dozens of everyday technologies. Better batteries mean electric cars that drive farther and phones that hold charges longer. Improved sensors could help doctors detect diseases earlier through wearable health monitors.

The team even found they could line up millions of these tiny tubes using electric fields. Imagine smart fabrics that stay conductive even when stretched or bent repeatedly, perfect for fitness trackers woven right into your workout clothes.

The nanoscrolls could also improve water filters and strengthen construction materials. Their hollow structure makes them ideal for guiding ions in desalination systems that turn seawater into drinking water.

The researchers say this represents real nanotechnology, the ability to control matter at incredibly small scales to build useful things. They're essentially making tiny pipes and wires from materials thinner than you can see.

For a material discovered just 15 years ago, MXene keeps surprising scientists with new possibilities.