-------- Original Message -------- Subject: Viskanta Lecture / Tuesday, March 25th, 2-3 pm / ME 2054 Date: Thu, 20 Mar 2014 17:48:40 +0000 From: Baumgardt, Jacqueline C. <jackieb@purdue.edu> To: Gelfand, Johanna K <jo@purdue.edu>, Donna Bystrom (bystrom@ecn.purdue.edu) <bystrom@ecn.purdue.edu>, Chris Murray (chrismur@ecn.purdue.edu) <chrismur@ecn.purdue.edu> CC: Pan, Liang <liangpan@purdue.edu> Jo, Donna & Chris, Can you please share the attached seminar announcement with your faculty & grad students? Thank you. Jackie _________________________________________________ This Viskanta fellowship serves to honor the tremendous legacy of Prof. Raymond Viskanta and derives from a recently established endowment. The Viskanta Fellowship is annually awarded to an individual who has demonstrated abilities to perform independent and innovative research in the field of thermal sciences. This year, Professor Laurent Pilon is invited to visit us as Viskanta Fellow and give the 2014 Viskanta Lecture. Prof. Pilon graduated from Purdue and currently is a full professor in the Department of Mechanical and Aerospace Engineering at UCLA. His research focuses on radiation transfer, applied optics, interfacial and transport phenomena, nanostructured materials for energy applications such as pyroelectric energy conversion, energy storage systems, photosynthetic production of biofuels ( http://www.seas.ucla.edu/~pilon/ <http://www.seas.ucla.edu/%7Epilon/> ). ____________________________________ *2014 Viskanta Lecture* *in Thermal Sciences* *Tuesday, March 25, 2014* *2:00pm, Room ME 2054* *Laurent Pilon* *Professor* *University of California, Los Angeles* Continuum Modeling of Interfacial and Transport Phenomena in Electric Double Layer Capacitors Abstract: Electrical double layer capacitors (EDLCs), also known as supercapacitors, have attracted significant attention as promising electrical energy storage systems. Applications range from hybrid electric vehicles to the smart grid with increasing contributions from intermittent renewable energy sources. EDLCs store energy via ion adsorption in the electric double layer forming at the electrode/electrolyte interfaces in highly porous materials. Dissociated ions, present in the electrolyte, are transported under the combined influence of diffusion and electrostatic forces and are subject to steric effects. This storage mechanism is very fast and highly reversible resulting in large power density and long cycle life. However, charging of EDLCs results in heat generation potentially leading to excessively large temperatures responsible for accelerated aging, increasing self-discharge rates, and thermal runaway. This seminar will review recent advances in physical modeling of interfacial and transport phenomena in EDLCs under equilibrium and charging and discharging conditions. Typical characterization method such as cyclic voltammetry was reproduced numerically to identify the dominant physical phenomena and to gain insight into experimental observations. In addition, a recent thermal model derived from first principles for EDLCs under constant-current cycling will be presented. In particular, irreversible Joule heating and reversible heat generation rates due to ion diffusion, steric effects, and changes in entropy of mixing will be discussed. Special effort will be made to systematically compare model predictions with experimental data. Finally, scaling analysis will be used to identify design rules for electrode and electrolyte for next generation EDLCs. Bio: Laurent Pilon received his PhD in Mechanical Engineering from Purdue University in 2002. He then joined the Mechanical and Aerospace Engineering Department at UCLA where he is now Full Professor. His research group is engaged in a wide range of interdisciplinary research projects at the intersection between interfacial and transport phenomena, material science, and biology for sustainable energy conversion, storage, and efficiency technologies. He is the recipient of the 2005 U.S. National Science Foundation CAREER Award, the 2008 Bergles-Rohsenow Young Investigator Award in Heat Transfer from the American Society of Mechanical Engineers, and the 2009 Young Scientist Award in Radiative Transfer from the Journal of Quantitative Spectroscopy and Radiative Transfer. He was elected Senior Member of SPIE in 2011. He also received several teaching awards from UCLA. Refreshments will be served at 1:30pm in ME 2054.