Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-18T07:52:31.641Z Has data issue: false hasContentIssue false
  • English
  • Français

Improvement of the hydrogen-storage performances of Li–Mg–N–H system

Published online by Cambridge University Press:  03 March 2011

Yongfeng Liu ,
Jianjiang Hu ,
Zhitao Xiong ,
Guotao Wu  and
Ping Chen
Yongfeng Liu
Affiliation:
Department of Physics, National University of Singapore, Singapore 117542, Singapore
Jianjiang Hu
Affiliation:
Department of Physics, National University of Singapore, Singapore 117542, Singapore
Zhitao Xiong
Affiliation:
Department of Physics, National University of Singapore, Singapore 117542, Singapore
Guotao Wu
Affiliation:
Department of Physics, National University of Singapore, Singapore 117542, Singapore
Ping Chen*
Affiliation:
Department of Chemistry, National University of Singapore, Singapore 117543, Singapore; and Department of Physics, National University of Singapore, Singapore 117542, Singapore
*
a) Address all correspondence to this author. e-mail: [email protected] This author was an editor of this journal during the review and decision stage. For the JMR policy on review and publication of manuscripts authored by editors, please refer to http://www.mrs.org/jmr_policy.
Get access

Abstract

Li2MgN2H2 can reversibly store more than 5.5 wt% hydrogen. However, the high activation energy of hydrogen desorption poses a kinetic barrier for low-temperature operation. In this work, the composition of the Li–Mg–N–H system has been modified by the partial substitution of Mg or Li by Na. The changes in structure and hydrogen absorption/desorption kinetics have been investigated. It was found that the peak temperature for hydrogen desorption was decreased by ∼10 °C, and that the hydrogen absorption/desorption isotherms were also significantly changed. Furthermore, the activation energy calculated by the Kissinger’s approach was reduced after the substitution of Mg or Li by Na. In addition, the different dehydrogenation structures were detected at different molar ratios of Mg, Li, and Na.

Keywords

HydrogenationKineticsStorage
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 5 , May 2007 , pp. 1339 - 1345
Copyright
Copyright © Materials Research Society 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Schlapbach, L. and Züttel, A.: Hydrogen-storage materials for mobile applications. Nature 414, 353 (2001).CrossRefGoogle ScholarPubMed
2FY 2002 Progress for Hydrogen, Fuel Cells, and Infrastructure Technologies Program (U.S. Department of Energy, November 2003). Available on-line at: http://www.eere.energy.gov/hydrogenandfuelcells/pdfs/33098.toc.pdf.Google Scholar
3Chen, P., Xiong, Z.T., Luo, J.Z., Lin, J.Y., and Tan, K.L.: Interaction of hydrogen with metal nitrides and imides. Nature 420, 302 (2002).CrossRefGoogle ScholarPubMed
4Xiong, Z.T., Wu, G.T., Hu, J.J., and Chen, P.: Ternary imides for hydrogen storage. Adv. Mater. 16, 1522 (2004).CrossRefGoogle Scholar
5Luo, W.F.: (LiNH2–MgH2): A viable hydrogen storage system. J. Alloys Compd. 381, 284 (2004).CrossRefGoogle Scholar
6Ichikawa, T., Isobe, S., Hanada, N., and Fujii, H.: Lithium nitride for reversible hydrogen storage. J. Alloys Compd. 365, 271 (2004).CrossRefGoogle Scholar
7Leng, H.Y., Ichikawa, T., Hino, S., Hanada, N., Isobe, S., and Fujii, H.: New metal–N–H system composed of Mg(NH2)2 and LiH for hydrogen storage. J. Phys. Chem. B 108, 8763 (2004).CrossRefGoogle Scholar
8Pinkerton, F.E.: Decomposition kinetics of lithium amide for hydrogen-storage materials. J. Alloys Compd. 400, 76 (2005).CrossRefGoogle Scholar
9Xiong, Z.T., Wu, G.T., Hu, J.J., Chen, P., Luo, W.F., and Wang, J.: Investigations on hydrogen storage over Li–Mg–N–H complex—The effect of compositional changes. J. Alloys Compd. 417, 190 (2006).CrossRefGoogle Scholar
10Kojima, Y., Matsumoto, M., Kawai, Y., Haga, T., Ohba, N., Miwa, K., Towata, S., Nakamori, Y., and Orimo, S.: Hydrogen absorption and desorption by the Li–Al–N–H system. J. Phys. Chem. B 110, 9632 (2006).CrossRefGoogle ScholarPubMed
11Xiong, Z.T., Hu, J.J., Wu, G.T., Chen, P., Luo, W.F., Gross, K., and Wang, J.: Thermodynamic and kinetic investigations of the hydrogen storage in the Li–Mg–N–H system. J. Alloys Compd. 398, 235 (2005).CrossRefGoogle Scholar
12Hu, J.J., Wu, G.T., Liu, Y.F., Xiong, Z.T., Chen, P., Murata, K., Sakata, K., and Wolf, G.: Hydrogen release from Mg(NH2)2-MgH2 through mechanochemical reaction. J. Phys. Chem. B 110, 14688 (2006).CrossRefGoogle ScholarPubMed
13Lide, D.R.: CRC Handbook of Chemistry and Physics, 87th edition (Taylor & Francis CRC Press, Boca Raton, FL, 2006).Google Scholar
14Xu, Q., He, D.H., Fujiwara, M., and Souma, Y.: Improved activity of Fe–Cu catalysts by physical mixing with zeolites for the hydrogenation of carbon dioxide. J. Mol. Catal. A: Chem. 120, L23 (1997).CrossRefGoogle Scholar
15Xiong, Z.T., Hu, J.J., Wu, G.T., and Chen, P.: Hydrogen absorption and desorption in Mg-Na-N-H system. J. Alloys Compd. 395, 209 (2005).CrossRefGoogle Scholar
16Ichikawa, T., Hanada, N., Isobe, S., Leng, H., and Fujii, H.: Mechanism of novel reaction from LiNH2 and LiH to Li2NH and H2 as a promising hydrogen storage system. J. Phys. Chem. B 108, 788 (2004).CrossRefGoogle Scholar
17Kissinger, H.E.: Reaction kinetics in differential thermal analysis. Anal. Chem. 29, 1702 (1957).CrossRefGoogle Scholar
18Kissinger, H.E.: Variation of peak temperature with heating rate in differential thermal analysis. J. Res. Natl. Bur. Stand. (U.S.) 57, 217 (1956).CrossRefGoogle Scholar
19Zhao, J.C.: General Electric Company, Poster of International Hydrogen Storage IPHE International Hydrogen Storage Conference, Lucca, Italy, June 10–22, 2005.Google Scholar