An overview of the sustainable energy technologies & policy research taking place at the University of Maryland Energy Research Center.

1. UMERC- Creating Sustainable Energy
Technologies & Policy
Eric D. Wachsman
University of Maryland Energy Research Center
University of Maryland
College Park, MD 20742
ewach@umd.edu

2. University of Maryland Energy Research Center
Spans UMD campus energy research, with expertise in:
Matching of In1-xGaxN Band Gap to Solar
– Solar
Spectrum
– Wind
HULC
– Biofuels
East Coast permitted offshore wind
developments (black squares)
– Combustion and gasification
– Carbon capture and sequestration
– Nuclear
– Energy efficiency 2007 Solar Decathlon - Top US ranked team 2011 Solar Decathlon WINNER
– Electrochemical energy storage and conversion
– Policy, economics, and climate change

3. Nanostructured Electrostatic
Supercapacitors
Banerjee, et al., Nature Nanotechnology (2009) Future EES
Nanostructured Electrochemical
Electrostatic Supercapacitors
capacitors
Liu and Lee, JACS (2008)
Li ion Superbatteries
Electrochemical
capacitors
AAO-ALD embedded metal- Li ion batteries
insulator-metal device Today’s EES Free-standing MnO2/PEDOT
coaxial nanowires
Nanotechnology - surface area for charge/discharge rates
- geometric density for energy density
New materials - increase voltage, stability, cycle life....

4. Higher Conductivity Electrolytes
Rhombohedral Monoclinic
Higher Conductivity NASICON
High stability, high voltage,
solid state electrolyte

5. High Power Density Fuel Cells
~2X Power Density
ESB/GDC
GDC
Integrating new materials 10 W/cm3
and microstructures to ~3 kW/kg at stack level
achieve world record
performance
Demonstrated stable (500hr) operation on JP5
J. S. Ahn, D. Pergolesi, M. A. Camaratta, H. Yoon, B. W. Lee, E. Traversa and
E. D. Wachsman, Electrochem. Comm., 11, 1504 (2009).

6. High Power & Energy Density Fuel Cells SOFCs
SOFC
Wachsman, et al. Electrochem.
Electrostatic capacitors Comm. (2009)"
Electrochemical
capacitors
Li ion batteries
V. Srinivasan, Batteries for Vehicular Applications, http://berc.lbl.gov/venkat/files/batteries-for-vehicles.pdf

7. High Power & Energy Density Fuel Cells SOFCs
Electrostatic capacitors
Electrochemical
capacitors
Li ion batteries
Scaling up technology
for commercialization