Investigation of Reaction Mechanism in Li₂NH Hydrogen Storage System by TEM

Abstract

  In order to clarify the reaction mechanism of the hydrogenation process in the Li₂NH system, we have observed the partially hydrogenated samples by transmission electron microscopy (TEM). From the TEM images of partially hydrogenated samples, it was shown that the LiNH₂ phase was located between Li₂NH phase, which was almost at the center of the particle, and LiH particles with the size of 100 nm. This result indicated that LiH was generated and grew up at the outside of the complex particle of Li₂NH and LiNH₂ with Li moving from the center to the surface of the particle.