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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/4520

Title: High levels of alkali metal storage in thin films of hexa-peri-hexabenzocoronene
Authors: Keil, M.
Samori, P.
Santos, D. A. dos
Birgerson, J.
Friedlein, R.
Dkhissi, A.
Watson, M.
Mullen, K.
Bredas, J. L.
J. P. Rabe and W. R. Salaneck
Issue Date: 2002-06-22
Publisher: American Institute of Physics
Magazine name: Journal of Chemical Physics
Volume: 116
Number: 24
Start page: 10854
End page: 10860
DOI: 10.1063/1.1479717
Abstract: The affects of alkali-metal atoms on the electronic structure of disordered and highly ordered thin films of the medium-size aromatic hydrocarbon hexa-peri-hexabenzocoronene (HBC) have been investigated by valence and core level photoelectron spectroscopies-ultraviolet photoelectron spectroscopy (UPS) and x-ray photoelectron spectroscopy (XPS)-and accompanying quantum-chemical calculations. Deposition of Li or Na atoms in situ leads to new spectral features in the UPS spectra, which are related to formerly unoccupied molecular states. The binding energies and intensities of these features depend on the nature of the counterion. The smaller Li ion exhibits a stronger influence on the electronic structure than its sodium counterpart. In the intercalation of sodium into ordered films, a high degree of molecular order is preserved, and, at high deposition levels, a surface dipole is formed that is associated with the layered structure of the compound. Remarkably, high levels of alkali-metal storage of at least one alkali-metal atom for each four carbon atoms have been observed, indicating clearly the potential use of these graphene materials in lithium-ion batteries with a high charge-storage capacity.
Rights: Copyright 2002 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in M. Keil, P. Samori, D. A. dos Santos, J. Birgerson, R. Friedlein, A. Dkhissi, M. Watson, K. Mullen, J. L. Bredas, J. P. Rabe, W. R. Salaneck, Journal of Chemical Physics, 116(24), 10854-10860 (2002) and may be found at http://link.aip.org/link/?JCPSA6/116/10854/1
URI: http://hdl.handle.net/10119/4520
Material Type: publisher
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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