QuantumSphere and University of South Florida Exceed 2010 DOE Goals for Solid State Hydrogen Storage
|Material capacity vs. temperature in developing hydrogen storage systems. Source: DOE. Click to enlarge.|
QuantumSphere, Inc. and the University of South Florida announced that they have exceeded the 2010 Department of Energy (DOE) goals for solid state hydrogen storage.
In a two-year materials discovery program funded by QuantumSphere, Inc., Professor Elias Stefanakos, director of the Clean Energy Research Center (CERC) at the University of South Florida, and Research Associate Dr. Sesha Srinivasan (currently an assistant professor at Tuskegee University), developed complex metal hydrides doped with QuantumSphere’s nano-Nickel particles.
|2010 Technical Targets|
These materials have a 6-8 wt% reversible hydrogen capacity below 150 °C. This compares to the 6 wt% system efficiency target set by the DOE, as this is believed to be the threshold at which hydrogen can be economically stored as a solid. These results have been confirmed independently by the Southwest Research Institute (SWRI) and the National Institute of Standards and Technology (NIST).
More specifically, the USF team developed and demonstrated:
Reversible hydrogen storage in complex multinary hydrides (LiBH4/LiNH2/MgH2)
Lowering the hydrogen decomposition temperature of novel complex borohydrides Zn(BH4)2
Reversible hydrogen storage behavior of nano-MgH2 destabilized Li-Mn-B-H systems
These materials exhibit a hydrogen capacity of > 6-8wt.% and are completely reversible at moderate temperatures (30-200 °C). The breakthrough for hydrogen storage in the complex multinary hydrides is based on an innovative manufacturing method, involving the destabilization of the quaternary hydride structure Li-B-N-H with nanocrystalline MgH2. The team lowered the hydrogen decomposition temperature (below 150 °C) by doping the complex hydrides with transition metal nanoparticles (e.g. Ni, Co, Fe, 3-10 nm, patented and manufactured by QuantumSphere Inc).
The project received significant financial support over the past three years from the US Department of Energy through a cross-cutting DOE grant awarded to Drs. Elias Stefanakos and Yogi Goswami.
Sesha Srinivasan/Lee Stefanakos, 2009 DOE Hydrogen Program Review (May 2009) (