Researchers at the University of Maryland have invented a single tiny structure that includes all the components of a battery that they say could bring about the ultimate miniaturization of energy storage components.
The structure is called a nanopore: a tiny hole in a ceramic sheet that holds electrolyte to carry the electrical charge between nanotube electrodes at either end. The existing device is a test, but the bitsy battery performs well. First author Chanyuan Liu, a Ph.D. student in materials science & engineering, says that it can be fully charged in 12 minutes, and it can be recharged thousands of time.
A team of UMD chemists and materials scientists collaborated on the project: Gary Rubloff, director of the Maryland NanoCenter and a professor in the Department of Materials Science and Engineering and the Institute for Systems Research; Sang Bok Lee, a professor in the Department of Chemistry and Biochemisty and the Department of Materials Science and Engineering; and seven of their Ph.D. students (two of whom have now graduated).
Many millions of these nanopores can be crammed into one larger battery the size of a postage stamp. One of the reasons the researchers think this unit is so successful is because each nanopore is shaped just like the others, which allows them to pack the tiny thin batteries together efficiently. Coauthor Eleanor Gillette’s modeling shows that the unique design of the nanopore battery is responsible for its success.
The space inside the holes is so small that the space they take up, all added together, would be no more than a grain of sand.
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