Recent development on hydrogen storage properties in metal-N-H systems

T. Ichikawa, H. Y. Leng, S. Isobe, Nobuko Hanada, H. Fujii

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

In this paper, we review our recent results on hydrogen storage properties in light metals(M)-nitrogen(N)-hydrogen(H) systems prepared by mechanochemical method. At first, the composite mixture of LiH and LiNH2 doped with TiCl3 as a catalyst was prepared by ball milling for 2 h under a H2 gas pressure of 1 MPa. The TDS profile indicated that ∼6 mass% H2 was desorbed by the reaction LiH + LiNH2 ↔ Li2NH + H2 in the temperature range from 150 to 250 °C under a He gas flow at a heating rate of 5 °C min-1, but the H-desorption equilibrium pressure PH2 was ∼0.1 MPa at 250 °C. This temperature is too high for onboard use, indicating that further improvement is necessary to destabilize the above H-storage reaction. For that, we clarified the H-desorption mechanism by the isotopic exchange experiments, on the basis of which we designed a new Li-Mg-N-H composite system with the reaction 8LiH + 3Mg(NH2)2 ↔ 4Li2NH + Mg3N2 + 8H2. This composite materials desorbed ∼7 mass% H2 in the range from 120 to 200 °C and the H-desorption equilibrium pressure PH2 was higher than 5 MPa at 200 °C, indicating that this system has an excellent potential for onboard applications.

Original languageEnglish
Pages (from-to)126-131
Number of pages6
JournalJournal of Power Sources
Volume159
Issue number1 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Sep 13
Externally publishedYes

Fingerprint

Hydrogen storage
Desorption
Metals
desorption
composite materials
Light Metals
hydrogen
metals
Light metals
Hydrogen
Composite materials
Ball milling
Heating rate
gas pressure
gas flow
Flow of gases
balls
Large scale systems
Nitrogen
Gases

Keywords

  • Composite
  • Hydrogen storage
  • Mechanochemical treatment
  • Metal amide/imide

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

Cite this

Recent development on hydrogen storage properties in metal-N-H systems. / Ichikawa, T.; Leng, H. Y.; Isobe, S.; Hanada, Nobuko; Fujii, H.

In: Journal of Power Sources, Vol. 159, No. 1 SPEC. ISS., 13.09.2006, p. 126-131.

Research output: Contribution to journalArticle

Ichikawa, T. ; Leng, H. Y. ; Isobe, S. ; Hanada, Nobuko ; Fujii, H. / Recent development on hydrogen storage properties in metal-N-H systems. In: Journal of Power Sources. 2006 ; Vol. 159, No. 1 SPEC. ISS. pp. 126-131.
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