Recently, the AB 2 C15 Laves-phase compounds have been of interest for metal hydride batteries due to their ability to absorb large amounts of hydrogen. Quasi-elastic neutron-scattering measurements were performed on the C15 Laves-phase compounds HfV 2H 0.1 using the IN10 spectrometer at the ILL, Grenoble, France. Quasi-elastic broadening was measured for momentum transfers between 0.27 and 1.96 åA −1 in the temperature range 250–380 K. The activation energy obtained from this data is discussed and compared to previous QENS measurements on the same compound for high hydrogen concentration.