It’s great in the lab, but will it actually work? That’s the million-dollar question perpetually leveled at engineering researchers. For a family of layered nanomaterials, developed and studied at Drexel University — and heralded as the future of energy storage — that answer is now, yes.
For some time, researchers have been working on using two-dimensional materials, atomically thin nanomaterials, as components for faster-charging, longer-lasting batteries and supercapacitors. But the problem with the existing techniques for doing so are that when the thickness of the material layer is increased to about 100 microns — roughly the width of a human hair, which is the industry standard for energy storage devices — the materials lose their functionality.
Recently published research from Drexel and the University of Pennsylvania, shows a new technique for manipulating two-dimensional materials that allows them to be shaped into films of a practically usable thickness, while maintaining the properties that make them exceptional candidates for use in supercapacitor electrodes.
The study, published in the journal Nature, focuses on using soft materials — similar to those in the liquid crystal displays of phones and televisions — as a guide for self-assembly of MXene sheets. MXenes, are a class of nanomaterials discovered at Drexel in 2011, that are particularly well-suited for energy storage.
“Our method relies on a marriage between soft material assembly and functional 2-D nanomaterials,” said Yury Gogotsi, PhD, Distinguished University and Bach professor in Drexel’s College of Engineering, who was a co-author of the research. “The resulting electrode films show rapid ion transport, outstanding rate handling, and charge storage equal to or exceeding commercial carbon electrodes.”
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