Abstract
We report the synthesis of nanostructured stage-2 potassium graphite, KC24, by intercalation of turbostratic graphite nanofibers produced from an electrospun polymer, and compare its properties with exfoliated graphite-based KC24. The nanostructured KC24 sample has low crystalline order and slightly increased interlayer spacing of 8.76 Å, compared with 8.65 Å in the bulk sample, indicating minimal registration of the graphite planes. Time-resolved time-of-flight neutron diffraction on both nanostructured and bulk KC24 under ammoniation is suggestive of a more homogeneous and faster pressure-modulated phase transition to the ternary ammoniated potassium-graphite in the nanostructured material. Following ammoniation, negligible hydrogen uptake is observed at 50 K.
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References
L. Schlapbach and A. Zuettel Nature 414 23–31 (2001).
M. S. Dresselhaus and G. Dresselhaus Adv. Phys. 51 1–186 (2002).
S. A. Solin and H. Zabel Adv. Phys. 37 87–254 (1988).
T. Enoki M. Suzuki and M. Endo Graphite Intercalation Compounds and Applications, Oxford University Press, Oxford, 2003.
E. P. Gilbert P. A. Reynolds J. W. White J. Chem. Soc., Farad. Trans. 94 1861 (1998).
C. Hérinckz, R. Perret and W. Ruland Carbon 10 711–722 (1972).
P. Kwizera M. S. Dresselhaus and G. Dresselhaus Carbon 21 121–129 (1983).
W. Rüdorff and E. Schulze Angew. Chem., 66 305 (1954).
B. R. York and S. A. Solin Phys. Rev. B 31 8206–8220 (1985).
W. Deng X. Xu W. A. Goddard Phys. Rev. Lett. 92 166103 (2004).
A. Lovell S M. Bennington N. T. Skipper C. Gejke H. Thompson M. A. Adams Physica B 385-386 163–165 (2006).
A. Lovell PhD Thesis, UCL (London) 2007.
N. Akuzawa S. Suzuki T. Terai and Y. Takahashi Synth. Met. 34 701–706 (1989).
A. Lovell F. Fernandez-Alonso, N.T. Skipper K. Refson S.M. Bennington and S.F. Parker Phys. Rev. Lett. 101, 126101/1-4 (2008).
J. K. Walters N. T. Skipper and A. K. Soper Chem. Phys. Lett., 300 444–450 (1999).
A. Lovell Z. Kurban S. M. Bennington et al., in preparation for publication
I. S. Chronakis J. Mat. Processing Tech. 167 283–293 (2005).
S. F. Fennessey R. J. Farris Polymer, 45 4217–4225 (2004).
S. Y. Gu J. Ren Q. L. Wu Synth. Met. 155 157–161 (2005).
C. Kim YJ. Kim, YA Kim, Solid State Comm. 132 567–571 (2004).
Z. Kurban, A. Lovell S. M. Bennington et al., submitted to European Polymer Journal.
P. Radaelli http://www.isis.stfc.ac.uk/instruments/osiris/data-analysis/ariel-manual9033.pdf
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Lovell, A., Kurban, Z., Stephen, M.B. et al. The Ammonia-Driven Phase Transition in Bulk and Nanostructured Potassium Graphite KC24 . MRS Online Proceedings Library 1216, 204 (2009). https://doi.org/10.1557/PROC-1216-W02-04
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DOI: https://doi.org/10.1557/PROC-1216-W02-04