This achievement is not only expected to accelerate the development of a whole class of storage materials, but also has far reaching applications in areas spanning energy technology and synthetic chemistry.
"We believe our research has provided a feasible route to regenerate aluminum hydride, a high capacity hydrogen storage material," says Dr. Ragaiy Zidan of SRNL, lead researcher on the project. The SRNL team, supported by the DOE Office of Energy Efficiency and Renewable Energy, has developed a novel closed cycle for producing aluminum hydride (AlH3), also known as alane, that potentially offers a cost-effective method of regenerating the hydrogen storing material in a way that allows it to repeatedly release and recharge its hydrogen. In this process, the hydride is made via an electrochemical method, and the starting material is regenerated directly with hydrogen. Although many attempts have been made in the past to make alane electrochemically, none of these previous attempts were totally successful.
For years, one of the major obstacles to the realization of the hydrogen economy is hydrogen storage. Solid-state storage, using solid materials such as metals that absorb hydrogen and release it as needed, has many safety and practicality advantages over storing hydrogen as a liquid or gas, and many storage materials have been examined trying to meet DOE's goals. Several materials have been discovered that have met or exceeded the DOE gravimetric and/or volumetric performance targets. Of those, however, the majority do not have the required thermodynamic and kinetic properties that allow them to release their hydrogen when needed, and be efficiently and economically reloaded with hydrogen when spent.
Alane possesses the desired qualities, but had been considered impractical because of the high pressures required to combine hydrogen and aluminum to reform the hydride material. Alternate methods of production using chemical synthesis have typically produced stable metal chloride byproducts that make it practically impossible to regenerate the alane. The electrochemical cycle demonstrated by Dr. Zidan and the SRNL team for production of alane avoids both of these issues.
In conjunction with this research, the SRNL team discovered novel ways to facilitate separation and formation of aluminum hydride that also apply to the formation of other complex metal hydrides and have the potential to cost-effectively regenerate other high capacity hydrogen storage materials. The SRNL results are expected to accelerate the development of a whole class of similar materials needed for hydrogen, batteries and other energy storage applications.
In addition, this work will significantly impact other fields including those of thin films, adduct based syntheses, and the recycling and regeneration of other materials.
The research is reported in an article published in Chem. Commun., 2009, 3717�, a publication of the Royal Society of Chemistry. The work was supported by a grant from the U.S. Department of Energy.
SRNL has a long history of successful research and development in the field of hydrogen storage methods, an outgrowth of the Laboratory's decades of support for the National Nuclear Security Administration's tritium mission. Tritium is the radioactive form of hydrogen used in national defense.
SRNL is DOE's applied research and development national laboratory at the Savannah River Site (SRS). SRNL puts science to work to support DOE and the nation in the areas of environmental management, national and homeland security, and energy security. The management and operating contractor for SRS and SRNL is Savannah River Nuclear Solutions, LLC.
Angeline French | EurekAlert!
Further reports about: > AlH3 > Nuclear > River > SRNL > SRS > Solid-state storage > aluminum hydride > chloride byproducts > electrochemical method > energy storage applications > hydrogen storage > hydrogen storage material > renewable energy > research and development > synthetic chemistry > thermodynamic and kinetic properties
First transcription atlas of all wheat genes expands prospects for research and cultivation
17.08.2018 | Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung
Staying in Shape
16.08.2018 | Max-Planck-Institut für molekulare Zellbiologie und Genetik
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
08.08.2018 | Event News
27.07.2018 | Event News
25.07.2018 | Event News
17.08.2018 | Materials Sciences
17.08.2018 | Information Technology
17.08.2018 | Physics and Astronomy