Decomposition of lithium amide and lithium imide with and without anion promoter
Document Type
Article
Publication Date
7-6-2011
Department
Department of Materials Science and Engineering
Abstract
The decompositions of lithium amide (LiNH2) and lithium imide (Li2NH) are important steps for hydrogen storage in Li3N. Herein, the decompositions of LiNH2 and Li2NH with and without anion promoter were investigated by using temperature-programmed decomposition (TPD) and X-ray diffraction (XRD) techniques. It was found that the decomposition of LiNH2 produced Li2NH and NH 3 via two steps in the temperature range of 300-450 °C: LiNH 2 into a stable intermediate species (Li1.5NH 1.5) and then into Li2NH. Furthermore, Li2NH is decomposed into Li, H2, and N2 without formation of Li3N in the temperature range of 550-750 °C. The decompositions of LiNH2 and Li2NH can be promoted by chloride ion (Cl-). The introduction of Cl- into LiNH2 resulted in the generation of a new NH3 peak at low temperature of 250 °C besides the original NH3 peak at 330 °C in its TPD profiles. Furthermore, Cl- can decrease the decomposition temperature of Li2NH by about 110 °C. © 2011 American Chemical Society.
Publication Title
Industrial and Engineering Chemistry Research
Recommended Citation
Zhang, J.,
&
Hu, Y. H.
(2011).
Decomposition of lithium amide and lithium imide with and without anion promoter.
Industrial and Engineering Chemistry Research,
50(13), 8058-8064.
http://doi.org/10.1021/ie2008696
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2236