Increasing the density of hydrogen storage is critical for the commercial introduction of hydrogen vehicles. Our nanostructured electrospun ammonia borane (AB)-polystyrene (PS) fibres hit the 2010 targets for storage capacity and H2 release rate, meshing closely with US DoE strategy for continuing AB research. Previous AB-PS samples were insufficiently nanostructured to show the expected changes from the bulk, but our latest fibres show kinetics 15x faster than bulk AB, and we would like to compare these samples with INS data collected during thermolysis of pure AB in a previous experiment. Using INS to help pin down the chemistry changes in the AB-PS hydride, in conjunction with diffusion through QENS, diffraction, FTIR and DSC, as well as structural evolution of the PS with XRD, we hope to link the AB fibres' nanostructural evolution to the improvement in hydrogen storage properties.