Hydrogen storage kinetics: The graphene nanoplatelet size effect

Efrat Ruse, Matat Buzaglo, Ilan Pri-Bar, Liran Shunak, Roey Nadiv, Svetlana Pevzner, Orit Siton-Mendelson, Vladimir M. Skripnyuk, Eugen Rabkin, Oren Regev

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The kinetics of hydrogen storage in magnesium can be accelerated by nanocarbon additives. In this study, we show that loading magnesium by graphene nanoplatelets (GNP) enhances the kinetics by more than an order of magnitude. The GNP presence reduces the Mg agglomeration, induced by de/hydriding, and accelerates the kinetics by connecting between Mg particles. The GNP were prepared by top-down graphite ball-milling in the presence of various organic protective agents. We found that both the molecular structure of the protective agent and the milling energy dictated the GNP properties, namely, size, thickness, defect density and specific surface area. We demonstrated how manipulation of the GNP size has a major effect on the hydrogen storage kinetics in magnesium-GNP composites.

Original languageEnglish
Pages (from-to)369-376
Number of pages8
JournalCarbon
Volume130
DOIs
StatePublished - 1 Apr 2018

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science

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