A study led by Kansas State University’s Suprem Das (Associate Professor of Industrial and Manufacturing Systems Engineering) in collaboration with the university’s prominent physics professor Christopher Sorensen shows potential methods of manufacturing. GrapheneBase nano ink for laminating supercapacitors in the form of flexible and printable electronic devices.
As researchers around the world are studying the possibility of replacing batteries with supercapacitors, the team led by Das makes another prediction about energy devices that can be charged and discharged very fast (within tens of seconds). doing. Team work can be adapted to integrate them to overcome the slow battery charging process. In addition, Das is developing laminated moldings of small supercapacitors called micro supercapacitors, which one day can be used for wafer scale integration in silicon processing.
“Additive manufacturing is attractive, cost-effective, and has a variety of design considerations,” says Das.
The team has developed a supercapacitor that has been tested with 10,000 cycles of charging and discharging. This is a promising number to assess the reliability of these devices. The team is also studying the variety of these microsupercapacitors through mechanically flexible printing, Das said. surface. To this end, they used a reliable 20 micrometer-thick polyimide (plastic) substrate. Das is very interested in converting new materials into devices.
“When you think about the best materials and want to make the best devices, it’s simple and not simple,” says Das. “Next, we need to understand the underlying physics and chemistry associated with the device.”
Another advantage of Das’ invention is the green side of the research he visualized through constructive discussions with Sorensen. When Das met Sorensen, he realized that he could use his expertise in laminated modeling to convert these materials into useful ones. In this case, make a small energy storage device.
A few months later, after developing nanoink technology, Das applied for a US patent and used it to demonstrate printed microsupercapacitors.
Das is particularly interested in forming this synergistic collaboration with Sorensen due to the energy efficient, scalable and chemical-free nature of the graphene manufacturing process and his own group of graphene ink manufacturing processes. I have. Both of these processes are patented / patent-pending technologies and are industrially relevant, Das said.
“We produce high-quality multi-layer graphene by exploding a fuel-rich mixture of unsaturated hydrocarbons such as acetylene and oxygen in a few liters of chamber,” says Sorensen. “Our patented method is simple and requires little energy and is ecologically harmless. It does not require toxic chemicals. Scale up to produce high quality and inexpensive graphene. it was done.”
Graphene is recognized as an amazing material with many potentials due to its many excellent physical properties. Many graphene manufacturing methods have been developed around the world, and graphene is produced in large quantities. However, engineers say that graphene is not yet on the market because none of these methods have the right combination of economics, ecology and product quality to enable graphene to reach its full potential. I know well. However, according to Sorensen and Das, the graphene and nanoink manufacturing methods pursued at Kansas State University aim to meet all of these requirements.
A study of printed supercapacitors, Graphene Aerosol Gel Ink for Printing Micro Supercapacitors, was recently published as a cover article in the journal. ACS Applied Energy Materials..
Reference: “Graphene Aerosol for Printing Micro Supercapacitors” by Anand PS Gaur, Wenjun Xiang, Arjun Nepal, Justin P. Wright, Pingping Chen, Thiba Nagaraja, Shusil Sigdel, Brice LaCroix, Christopher M. Sorensen, Suprem R. Das Gel Ink “, June 11, 2021 ACS Applied Energy Materials..
DOI: 10.1021 / acsaem.1c00919
Former postdoctoral fellows from the Das research team, Anand Gaur, several graduate students from the Das and Sorensen groups, and Brice La Croix, an associate professor at the K-State Department of Geology, contributed to this work. The work was supported by a grant from the National Science Foundation.
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