Hydrogen storage kinetics: The graphene nanoplatelet size effect
| Autor: | Ilan Pri-Bar, Liran Shunak, Oren Regev, Roey Nadiv, Svetlana Pevzner, V.M. Skripnyuk, Eugen Rabkin, Orit Siton-Mendelson, Efrat Ruse, Matat Buzaglo |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Magnesium Economies of agglomeration Kinetics chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Hydrogen storage Chemical engineering chemistry Specific surface area Molecule General Materials Science Graphite 0210 nano-technology Order of magnitude |
| Zdroj: | Carbon. 130:369-376 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2018.01.012 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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