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2009 | 7 | 2 | 232-236

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Nano structure of low crystallinity carbon materials analyzed by using high energy X-ray diffraction


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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.


  • Nagano national College of Technology, 716 Tokuma, 381-8550, Nagano, Japan
  • Nagano national College of Technology, 716 Tokuma, 381-8550, Nagano, Japan
  • Nagano national College of Technology, 716 Tokuma, 381-8550, Nagano, Japan
  • Shinshu University, 4-17-1 Wakasato, 380-8553, Nagano, Japan


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