Desorption characteristics of mechanically and chemically modified LiNH2 and (LiNH2 + LiH)

Yao, J. H., Shang, C., Aguey-Zinsou, K. F. and Guo, Z. X. (2007) Desorption characteristics of mechanically and chemically modified LiNH2 and (LiNH2 + LiH). Journal of Alloys and Compounds, 432 (1-2). pp. 277-282. ISSN 1873-4669

Full text not available from this repository.

Abstract

Considerable effort has been devoted to the Li–N–H system for solid-state hydrogen storage. However, the desorption mechanism is still unclear, the desorption kinetics is too low, and the desorption temperature is too high for practical considerations. Here, the characteristics of LiNH2 and a (LiNH2 + LiH) mixture were comparatively studied by simultaneous thermogravimetry, differential scanning calorimetry and mass spectrometry for further understanding of H2 desorption in the (LiNH2 + LiH) system. Both mechanical milling and chemical addition were noted to influence the decomposition kinetics of LiNH2. Mass spectrometry and thermal analysis of (LiNH2 + LiH) mixtures indicate that approximately 5 mass% of H2 is released after 4 h of milling without any apparent release of NH3, whereas insufficient mixing of the two compounds cannot stop the release of NH3 from the mixture. Chemical additions, Mn, V, MnO2 and V2O5, promote the thermal decomposition of LiNH2, but show insignificant effect on hydrogen desorption of the (LiNH2 + LiH) mixture.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Rosie Cullington
Date Deposited: 27 Feb 2011 12:40
Last Modified: 24 Oct 2022 01:35
URI: https://ueaeprints.uea.ac.uk/id/eprint/25148
DOI: 10.1016/j.jallcom.2006.05.113

Actions (login required)

View Item View Item