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Stephen Wilke

I study iron oxide redox cycles as a scheme to reversibly store hydrogen. Using reduction by hydrogen gas and subsequent oxidation with steam, we can transition between different oxidation states of Fe/FeO, while storing or releasing hydrogen in the process. The main challenge for this technology is the mechanical pulverization and sintering of the iron oxide substrate with repeated cycling, due to the volume change of phase transition. My goal is to understand the phase change induced strain by looking at different microstructures, made via freeze casting or 3D printing.
            I earned my B.S. in chemical engineering from Caltech in 2010. Since then, I’ve been involved in various areas of research both in academia and industry, including solid oxide fuels cells, thermochemical fuel production cycles, and lithium ion batteries. Outside of lab, I enjoy running, backpacking, rock climbing, cooking, and baking. Originally from Columbus, NE, I am a Midwestern at heart and love life in Evanston/Chicago, especially for the beauty of Lake Michigan and all the great places to eat.

Research

Redox Cycling of Fe/FeO Microstructures

Education

B.S. Chemical Engineering, California Institute of Technology

Contact

Phone: 847.467.5416
Fax:  
e-mail: stephenwilke2021@u.northwestern.edu
Address: Materials Science & Eng
2220 Campus Drive
Evanston, IL 60208

Select Honors

Publications

  1. S. Wilke, B. Schweitzer, S. Khateeb, S. Al-Hallaj. Semi-Empirical Modeling of Capacity Fade: A Practical Approach for Battery Pack Manufacturers, ECS Transactions 73 (2016), 109-119. http://dx.doi.org/10.1149/07301.0109ecst.
  2. S. Wilke, B. Schweitzer, S. Khateeb, S. Al-Hallaj. Preventing Thermal Runaway Propagation in Lithium Ion Battery Packs using a Phase Change Composite Material: An Experimental Study, Journal of Power Sources (2016, in press).
  3. F.-A. LeBel, S. Wilke, B. Schweitzer, M.-A. Roux, S. Al-Hallaj, J.P.F. Trovao. A Lithium-Ion Battery Electro-Thermal Model of Parallellized Cells, IEEE 84th Vehicular Technology Conference (Fall 2016).
  4. B. Schweitzer, S. Wilke, S. Khateeb, S. Al-Hallaj. Experimental validation of a 0-D numerical model for phase change thermal management systems in lithium-ion batteries, Journal of Power Sources 287 (2015), 211-219. http://dx.doi.org/10.1016/j.jpowsour.2015.04.016.
  5. E.C. Brown, S.K. Wilke, D.A Boyd, D.G. Goodwin, S.M. Haile. Polymer sphere lithography for solid oxide fuel cells: a route to functional well-defined electrode structures, Journal of Materials Chemistry 20 (2010), 2190-2196. http://dx.doi.org/10.1039/B920973E.

 

September 16, 2016