Remarkably improved hydrogen storage properties of LiNH2-LiH composite via the addition of CeF4

Huai Jun Lin, Hai Wen Li, Hiroki Murakami, Etsuo Akiba

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Amide-hydride composite materials, such as LiNH2–LiH and Mg(NH2)2–2LiHcomposites, are promising candidates for hydrogen storage due to the high hydrogen storage capacity and moderate hydrogen storage enthalpies and entropies. However, the hydrogen absorption/desorption kinetics of the amide-based system is too sluggish, and emission of ammonia (NH3) during dehydrogenation also fatally deteriorates the hydrogen storage cyclic ability. In this study, we report that CeF4 shows a remarkable catalytic effect in improving hydrogen storage kinetic and cyclic properties, reducing dehydrogenation temperature, and suppressing emission of NH3 of LiNH2-LiH composite. Mechanism study reveals that the catalysis should be due to the in situ formed F-containing CeFx species during ball milling process.

Original languageEnglish
Pages (from-to)1017-1022
Number of pages6
JournalJournal of Alloys and Compounds
Volume735
DOIs
Publication statusPublished - Feb 25 2018

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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