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Laser Modified Transport in Electrochemical Materials Craig B. Arnold, Princeton University, DMR 0548147. Near ideal regime. Near ideal regime. 25 m J laser. e - limited regime. No laser. 50 m m. Proton limited regime. Hydrous ruthenium oxide.

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Laser Modified Transport in Electrochemical Materials

Craig B. Arnold, Princeton University, DMR 0548147

Near ideal regime

Near ideal regime

25 mJ laser

e- limited regime

No laser

50 mm

Proton limited regime

Hydrous ruthenium oxide

Existing and future needs for portable energy call for advanced electrochemical storage devices with improved performance. Developments in processing have led to novel properties and the need for a deeper understanding of underlying scientific issues such as transport, stability, and interface properties. Laser Direct-Write (LDW) Processing enables a fundamentally new dimension to this research topic as it can affect material structures and properties on multiple length scales during the deposition process. We show an increase in specific capacitance of hydrous ruthenium oxide with increasing laser energy depending on the initial water content regime. This result is attributed to improved electron conductivity with minimal decrease in proton reaction kinetics.

LDW Processing enables higher capacity and improved high rate behavior in supercapacitor materials


Laser Modified Transport in Electrochemical Materials

Craig B. Arnold, Princeton University, DMR 0548147

Photo credit: Frank Wojciechowski

As part of the broader impact of this work, we developed a new course offering open only to first-year students entitled “Materials and Tech-nology for a Sustainable Energy Future.” Each week in this hands-on course we discussed a a different energy technology, focusing on the key scientific and materials challenges. For a final project, we had students build upon their new and improve understanding by preparing educational and entertaining learning modules to be presented to the general public at the New Jersey Liberty Science Center (LSC).

Student evaluations spoke highly of how valuable this project was and how much they learned by trying to relate these topics to the general public. Brief canvassing of the visitors to the LSC showed that the students were successful at relating the science behind topics. This course was offered in the spring 2009 semester and is being offered again fall 2010.

Students prepared demonstrations on topics including batteries, fuel cells, biogas conversion, hydroelectric power, and wind power for presentation at the LSC. Here, Colleen McCullough and Ben Siegfried are talking with a particularly interested 3-year-old about batteries as the PI (3rd from left) looks on.