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Nitrogen doping and nanofabrication by a plasma plus thermal system for energy applications 
Date/Time:
May 8, 2013   4:00pm - 4:30pm
 
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  Video Only
 
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A plasma plus thermal (PPT) system, with various plasma sources, has been developed. This system combines a gas discharge and heating. It has the exciting advantages of allowing controllable element doping and effective nanofabrication of materials for energy devices, e.g. dye sensitized solar cells (DSSCs), and anodes for Lithium Ion batteries (LIBs). An increase in Ti3+ charge states in TiO2 nanoparticles was found to enhance their photon absorption efficiency [1]. The PPT system was used to dope TiO2 with nitrogen to better understand the role of Ti3+ and to improve charge transport [2]. The PPT system was also used to prepare SnO2 for anodes. SnO2 is a very promising material but suffers from a large initial capacity loss and low cycling efficiency, caused by the irreversibility of its reduction and damage due to swelling [3]. Preliminary testing of a nanostructured and nitrogen-doped anode material has given promising results.
 


 
 
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