Research Articles
Chemical intercalation of graphite using chromium trioxide for the anode application in rechargeable sodium-ion batteries
Authors:
J.N. Kanagaratnam,
National Institute of Fundamental Studies, LK
About J.N.
National Center for Advanced Battery Research
T.H.N.G. Amaraweera,
Uva Wellassa University, LK
About T.H.N.G.
Department of Applied Earth Sciences
N.W.B. Balasooriya,
University of Peradeniya, LK
About N.W.B.
Department of Geology
H.W.M.A.C. Wijayasinghe
National Institute of Fundamental Studies, LK
About H.W.M.A.C.
National Center for Advanced Battery Research
Abstract
Among naturally occurring graphite, Sri Lankan vein graphite (SLVG) is well known for its high initial purity in the range of 95 - 99% carbon, high crystallinity, extensive mineralization, and mode of occurrences. Due to its distinctive properties, Sri Lankan vein graphite has been proved to be a promising anode material for rechargeable Lithium-ion battery (LIB) applications. With the increasing demand for rechargeable energy sources, the supply of Lithium-ion batteries (LIB) could be hindered by the limited lithium reserves. Therefore, alternatives for Lithium in LIBs are being explored. In this context Sodium-ion batteries (SIB) have attracted much attention during the recent past. This study focused on studying the intercalation and deintercalation of Na+ ions into the domain of Graphite Intercalation Compound (GIC), fabricated from natural vein graphite, for the anode application of rechargeable SIBs. Graphite Intercalation Compounds with CrO3 (GIC-CO) were successfully synthesized using SLVG as the starting material. The synthesized GIC-CO exhibited an interlayer spacing of 4.02 Å which is regarded to be suitable for Na + ion intercalation. The anode material fabricated from GIC-CO showed a capacity of 26.9 mA h g-1 which is higher than that of pristine graphite (13 mA h g-1). This shows the potential of utilizing this GIC for anode applications in SIBs. The anode could be improved by optimizing the molar ratios of CrO 3 and the reaction time to obtain expanded graphite making it appropriate for high-capacity SIB application
How to Cite:
Kanagaratnam, J. N., Amaraweera, T. H. N. G., Balasooriya, N. W. B., & Wijayasinghe, H. W. M. A. C. (2022). Chemical intercalation of graphite using chromium trioxide for the anode application in rechargeable sodium-ion batteries. Ceylon Journal of Science, 51(1), 21–27. DOI: http://doi.org/10.4038/cjs.v51i1.7975
Published on
14 Mar 2022.
Peer Reviewed
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