Intermediate species and kinetics of lithium imide decomposition

Authors

Junqing Zhang, Michigan Technological University
Yun Hang Hu, Michigan Technological UniversityFollow

Document Type

Article

Publication Date

1-1-2012

Department

Department of Materials Science and Engineering

Abstract

The decomposition of lithium imide (Li2NH) is an important step for hydrogen storage in Li3N. In this paper, the decomposition of Li 2NH was investigated by using temperatureprogrammed decomposition (TPD) and X-ray diffraction (XRD) techniques. It was found that the decomposition of Li2NH produced Li, N2 and H2 via two steps: Li2NH into an intermediate speciesdLi4NH and then into Li. The kinetic analysis of Li2NH decomposition showed that the activation energies are 533.6 kJ/mol for the first step and 754.2 kJ/mol for the second step. Furthermore, XRD demonstrated that the Li4NH, which was generated in the decomposition of Li2NH, formed a solid solution with Li 2NH. In the solid solution, Li4NH possesses a similar cubic structure as Li2NH. The lattice parameter of the cubic Li4NH is 0.5033 nm.

Publisher's Statement

Copyright © 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Publisher’s version of record: https://doi.org/10.1016/j.ijhydene.2011.12.061

Publication Title

International Journal of Hydrogen Energy

Recommended Citation

Zhang, J., & Hu, Y. (2012). Intermediate species and kinetics of lithium imide decomposition. International Journal of Hydrogen Energy, 37(13), 10467-10472. http://doi.org/10.1016/j.ijhydene.2011.12.061
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2382