Journal
ACS NANO
Volume 4, Issue 7, Pages 3903-3908Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn1006946
Keywords
nanoconfinement; reactive hydride composite; hydrogen storage; lithium borohydride; magnesium hydride
Categories
Funding
- Danish National Research Foundation (Centre for Materials Crystallography)
- Danish Strategic Research Council (Centre for Energy Materials)
- Danish Research Council for Nature and Universe (Danscatt)
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Hydrogen is recognized as a potential, extremely interesting energy carrier system, which can facilitate efficient utilization of unevenly distributed renewable energy. A major challenge in a future hydrogen economy is the development of a safe, compact, robust, and efficient means of hydrogen storage, in particular, for mobile applications. Here we report on a new concept for hydrogen storage using nanoconfined reversible chemical reactions. LiBH4 and MgH2 nanoparticles are embedded in a nanoporous carbon aerogel scaffold with pore size D-max similar to 21 nm and react during release of hydrogen and form MgB2. The hydrogen desorption kinetics is significantly improved compared to bulk conditions, and the nanoconfined system has a high degree of reversibility and stability and possibly also improved thermodynamic properties. This new scheme of nanoconfined chemistry may have a wide range of interesting applications in the future, for example, within the merging area of chemical storage of renewable energy.
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