umerc: creating sustainable energy technologies and policy
TRANSCRIPT
UMERC- Creating Sustainable Energy Technologies & Policy
Eric D. Wachsman
University of Maryland Energy Research Center
University of Maryland College Park, MD 20742
University of Maryland Energy Research Center Spans UMD campus energy research, with expertise in:
– Solar – Wind – Biofuels – Combustion and gasification – Carbon capture and sequestration – Nuclear – Energy efficiency – Electrochemical energy storage and conversion – Policy, economics, and climate change
Matching of In1-xGaxN Band Gap to Solar Spectrum
HULC East Coast permitted offshore wind
developments (black squares)
2007 Solar Decathlon - Top US ranked team 2011 Solar Decathlon WINNER
Electrochemical capacitors
Li ion batteries
Electrostatic capacitors
Today’s EES
Future EES
Li ion Superbatteries
Nanostructured Electrochemical Supercapacitors
Liu and Lee, JACS (2008)
Free-standing MnO2/PEDOT coaxial nanowires
Nanostructured Electrostatic Supercapacitors
Banerjee, et al., Nature Nanotechnology (2009)
AAO-ALD embedded metal-insulator-metal device
Nanotechnology - surface area for charge/discharge rates - geometric density for energy density
New materials - increase voltage, stability, cycle life....
Higher Conductivity Electrolytes Higher Conductivity NASICON Rhombohedral Monoclinic
High stability, high voltage, solid state electrolyte
ESB/GDC
GDC
~2X Power Density
J. S. Ahn, D. Pergolesi, M. A. Camaratta, H. Yoon, B. W. Lee, E. Traversa and E. D. Wachsman, Electrochem. Comm., 11, 1504 (2009).
Integrating new materials and microstructures to achieve world record performance
High Power Density Fuel Cells
10 W/cm3 ~3 kW/kg at stack level
Demonstrated stable (500hr) operation on JP5
Electrostatic capacitors
Electrochemical capacitors
Li ion batteries
SOFCs
Wachsman, et al. Electrochem. Comm. (2009)"
SOFC
V. Srinivasan, Batteries for Vehicular Applications, http://berc.lbl.gov/venkat/files/batteries-for-vehicles.pdf
High Power & Energy Density Fuel Cells
Electrostatic capacitors
Electrochemical capacitors
Li ion batteries
SOFCs High Power & Energy Density Fuel Cells
Scaling up technology for commercialization