ABSTRACT

Of the challenges surrounding the widespread introduction of hydrogen as a renewable, carbon-free energy carrier, the problem of storage is one of the most acute (Schlapbach and Züttel 2001). In particular, the low energy density of gaseous hydrogen requires extreme compaction of the gas in order to obtain suitably low-volume storage for portable applications such as road transport (Ahluwalia et al. 2012) and consumer electronics. The new generation of fuel cell light duty vehicles (Figure 4.1) incorporates composite pressure tanks with up to 700 bar (70 MPa) of hydrogen in close proximity to the passenger compartment, raising questions of public acceptance. The weight of these tanks and the associated balance of plant detract from the

4.1 Introduction ....................................................................................................77 4.1.1 Hydrogen Storage ...............................................................................77 4.1.2 Electrospinning and Hydrogen Storage .............................................. 81

4.2 Carbon Fibers for High-Pressure Hydrogen Tanks ........................................ 82 4.3 Activated Carbon Nanobers ......................................................................... 82 4.4 Electrospun Fibers as a Base for Doped High-Surface-Area Carbons ..........84