Nano structure of low crystallinity carbon materials analyzed by using high energy X-ray diffraction |
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Authors: | Kyoichi Oshida Tatsuo Nakazawa Kozo Osawa Morinobu Endo |
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Institution: | (1) Nagano national College of Technology, 716 Tokuma, 381-8550 Nagano, Japan;(2) Shinshu University, 4-17-1 Wakasato, 380-8553 Nagano, Japan |
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Abstract: | In this study, we tried to characterize a kind of low crystallinity carbon materials. The structure of polyparaphenylene(PPP)-based
carbon was analyzed by means of high energy X-ray diffraction using the apparatus of SPring-8. The experimental results revealed
the existence of basic structural units (BSU) in the highly disordered materials like PPP-based carbon. It is thought that
the PPP-based carbons consist of small turbostratic particles, which have a few piled up poly-aromatic layers. The structure
of the PPP-based carbon which seemed to be amorphous was estimated to have hexagonal carbon layers with the size of up to
1 nm. The pores in the PPP-based carbon seem to be clearances formed among the BSUs and amorphous carbon. The pore size of
PPP-based carbon was estimated from the result of N2 absorption measurement. The experimental results suggested that the lithium ion charge mechanism in the PPP-based carbon
differs from that in graphite.
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Keywords: | disordered carbon material high energy X-ray diffraction nano structure adsorption |
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