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University of Missouri

Innovation

Laser-Writing Technique Can Help Manufacturers Create Micro Energy Storage

Transferring an energy source to virtually any shape

Published: Tuesday, March 29, 2016 - 13:52

In the race to design smaller handheld devices and smartphones, a key factor is decreasing the sizes of components. As the demand for thinner and lighter microelectronic devices increases, manufacturers often are limited by how oddly shaped the energy sources must become to make them conform to the smaller space. Researchers at the University of Missouri (MU) have developed a method of transferring an energy source to virtually any shape.

Using an efficient laser-writing technique, MU scientists can help smartphone manufacturers potentially fabricate energy storage units like microbatteries and micro fuel cells that are more environmentally friendly, highly designable, and thin.

“The direct laser writing (DLW) method and technique has seen a rapid advancement in the past decade,” says Jian Lin, an assistant professor in the Department of Mechanical and Aerospace Engineering in the MU College of Engineering. “The main goal of our research was to find an efficient and cost-effective way to integrate nanostructures with micro energy storage units for applications in micro-electronics. Our lab decided to test whether catalysts could be synthesized and patterned on any surface by a one-step laser processing method to produce microbatteries and micro fuel cells in the shapes dictated by computer programs.”

With this in mind, Lin and his team set out to prove their theory. They adapted the DLW method to synthesize and pattern hybrid nanocatalysts, or fuel sources, into complex geometric shapes. Using computer-controlled laser writing that uses higher heat and pressure, the scientists were able to produce a surface that became electrically conducive and also has catalytic functionalities.

“This is the first step in manufacturing micro fuel cells that convert chemical energy into electrical energy, and batteries that can integrate into microcircuits” says Lin. “Also, this technique has been proven to produce microsupercapacitors. By honing the process, handheld device and smartphone manufacturers will be able to produce components in whatever shape or size they choose, greatly impacting the size of these devices. Also, manufacturers will be able to choose more environmentally friendly catalysts for generating energy, such as hydrogen or oxygen, which are considered cleaner fuels. The possibilities will be endless.”

The paper, “Laser induced MoS2/carbon hybrids for hydrogen evolution reaction catalysts,” recently was published in a special issue of “Emerging Investigators 2016: Novel Design Strategies for New Functional Materials” in the Journal of Materials Chemistry-A.

For more on the new method, see: “Customized patterning technique earns mechanical researcher, team high marks.”

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About The Author

University of Missouri

The University of Missouri (aka Mizzou, MU, or University of Missouri–Columbia) is a public, land-grant, research university that was founded in 1839 in Columbia, Missouri. It is one of only six public universities in the United States with a school of medicine, veterinary medicine, engineering, agriculture, and law all on one campus. The University of Missouri Research Reactor Center is the world’s most powerful university research reactor.