Hydrogen diffusion studies of microcrystalline and crystalline LaNi3.94Si0.54 films

Kinetic behaviour of low-Co AB5-type metal hydride electrodes

“…It can be seen that the value of the D H increases rapidly from 0.57 × 10 −11 to 1.48 × 10 −11 cm 2 s −1 with the increase in SOC of the metal hydride electrode from 0 to 20% and then has a maximum value at 40-100% of state of charge. A similar concentration dependence where the diffusion coefficient increases with hydrogen concentration has been seen previously [31][32][33][34][35]. The increase in the diffusion coefficient at a low SOC, could be attributed to the change in the crystal structure of the alloy hydride when transforming from the solid solution phase (␣-phase) to the hydride phase (␤-phase).…”

Electrochemical characteristics of AB5-type hydrogen storage alloys

“…It can be seen that the value of the D H increases rapidly from 0.57 × 10 −11 to 1.48 × 10 −11 cm 2 s −1 with the increase in SOC of the metal hydride electrode from 0 to 20% and then has a maximum value at 40-100% of state of charge. A similar concentration dependence where the diffusion coefficient increases with hydrogen concentration has been seen previously [1,[31][32][33][34][35]. The increase in the diffusion coefficient at a low SOC, could be attributed to the change in the crystal structure of the alloy hydride when transforming from the solid solution phase (␣ phase) to the hydride phase (␤ phase).…”