Nuclear magnetic resonance study of Li and H diffusion in the high-temperature solid phase of LiBH4

The measured spin-lattice relaxation rates of 1H (a), 7Li (b) and 11B (c) as functions of the inverse temperature for the high-temperature solid phase of LiBH4. The curves show the simultaneous Bloembergen-Purcell-Pound fits to the data with the fixed parameters of Li diffusion (the pre-exponential factor τ0=1.1×10−15 s and the activation energy Ea=0.56 eV). This plot indicates that all the relaxation data for different nuclei and at different resonance frequencies are governed by a single Li jump process.