Powder properties of hydrogenated ball-milled graphite

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.09.024· OSTI ID:22420708

Wedderburn, J.; Harris, R.; Book, D. ^[1]

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1. Metallurgy and Materials, University of Birmingham, Birmingham, B15 2TT (United Kingdom)

Ball milling is an effective way of producing defective and nanostructured graphite. In this work, the hydrogen storage properties of graphite, ball-milled in a tungsten carbide milling pot under 3 bar hydrogen for various times (0–40 h), were investigated by TGA-Mass Spectrometry, XRD, SEM and laser diffraction particle size analysis. For the conditions used in this study, 10 h is the optimum milling time resulting in desorption of 5.5 wt% hydrogen upon heating under argon to 990 °C. After milling for 40 h, the graphite became significantly more disordered, and the amount of desorbed hydrogen decreased. After milling up to 10 h, the BET surface area increased while particle size decreased; however, there is no apparent correlation between these parameters, and the hydrogen storage properties of the hydrogenated ball-milled graphite.

• OSTI ID: 22420708
• Journal Information: Materials Research Bulletin, Vol. 60; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ARGON
CORRELATIONS
DESORPTION
GRAPHITE
HEATING
HYDROGEN
HYDROGEN STORAGE
HYDROGENATION
MASS SPECTROSCOPY
MILLING
NANOSTRUCTURES
PARTICLE SIZE
POWDERS
SCANNING ELECTRON MICROSCOPY
SURFACE AREA
THERMAL GRAVIMETRIC ANALYSIS
TUNGSTEN CARBIDES
X-RAY DIFFRACTION