Improvement in hydrogen cycling properties of magnesium through added graphite |
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| Affiliation: | 1. Institute for Superconducting and Electronic Materials, University of Wollongong, NSW, 2522, Australia;2. Faculty of Engineering, University of Wollongong, NSW, 2522, Australia;3. ARC Center of Excellence for Electromaterials Science, University of Wollongong, NSW, 2522, Australia;1. Université de Bordeaux, ICMCB, 87 Avenue du Dr Schweitzer, F-33608 Pessac, France;2. LCPM, Université Libanaise, Faculté des Sciences 2, 90656 Jdeidet El Matn, Lebanon;1. Université de Bordeaux, ICMCB-CNRS, 87 Avenue du Dr Schweitzer, F-33600 Pessac, France;2. LCPM/PR2N, Université Libanaise, Faculté des Sciences 2, 90656 Jdeidet El Matn, Lebanon;3. Universidade Federal do ABC, Avenida dos Estados 5001, 09210-580 Santo André – SP, Brazil;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;2. Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, China;3. Guangdong Provincial Key Laboratory of Fuel Cell Technology, South China University of Technology, Guangzhou 510641, China |
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| Abstract: | Magnesium was milled under hydrogen with three types of carbon allotropes: carbon black, graphite, and multi-walled carbon nanotubes, respectively, using a special low-energy shearing mill. Structural and phase evolution were investigated using X-ray diffractometry (XRD) and morphology was investigated by scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS). Raman spectroscopy was used to investigate the changes in the nature of carbon–carbon bonding and differential scanning calorimetry (DSC) to investigate desorption characteristics. A Sieverts-type apparatus was applied to characterize the hydrogen absorption and desorption properties. It was found that graphite not only improved the hydrogen absorption, but also the desorption kinetics. |
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