Study of Adsorption Properties on Lithium Doped Activated Carbon Materials
S. Łośa, L. Duclauxb, M. Letellierb and P. Azaïsb
aInstitute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
bCentre de Recherche sur la Matière Divisée, 1B rue de la Férollerie, 45071 Orléans Cédex 2, France
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Received: 24 04 2005;
A volumetric method was applied to study an adsorption coefficient of hydrogen molecules in a gas phase on super activated carbon surface. The investigations were focused on getting the best possible materials for the energy storage. Several treatments on raw samples were used to improve adsorption properties. The biggest capacities were obtained after high temperature treatment at reduced atmosphere. The adsorption coefficient at 77 K and 2 MPa amounts to 3.158 wt%. The charge transfer between lithium and carbon surface groups via the doping reaction enhanced the energy of adsorption. It was also found that there is a gradual decrease in the adsorbed amount of H2 molecules due to occupation active sites by lithium ions.
DOI: 10.12693/APhysPolA.108.371
PACS numbers:84.60.-h, 33.15.-e, 76.30.-v, 79.60.-i