caa a22 4500 388021691 CHVBK 20180307124926.0 cr unu---uuuuu 161130e199807 xx s 000 0 eng 10.1557/JMR.1998.0283 doi S0884291400045192 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0283 Structural characterization of carbons obtained from polyparaphenylenes prepared by the Kovacic and Yamamoto methods [Elektronische Daten] The structure of polyparaphenylene (PPP)-based carbons prepared by the Kovacic and Yamamoto methods heat-treated at 650-3000 °C have been characterized comparatively by using x-ray diffraction, SEM, TEM, and Raman spectroscopy. Both kinds of carbons indicate not typical but poor graphitizing behavior, especially for the case of PPP Yamamoto samples, and much less for PPP Kovacic samples, by heat treatment up to 3000 °C. The Kovacic-based samples heat-treated at 600-2400 °C have a more developed layer structure than that of Yamamoto-based samples. In contrast, for HTT's (heat-treatment temperature) more than about 2400 °C, PPP Yamamoto-based carbons exhibit a more developed crystallite structure than PPP Kovacic-based carbons. At a given HTT, PPP Kovacic-based carbons have a much more quinoid-like structure and graphene-type structure than PPP Yamamoto-based carbons, as indicated by the carbon yield and Raman scattering measurements. It is suggested that the detailed structure of the starting polymers influences the texture as well as the microstructure of resultant carbons even though both are obtained from the same kinds of precursors. These microstructures also largely influence the anode performance when these carbons are used in Li ion batteries. Copyright © Materials Research Society 1998 Endo M. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Kim C. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Hiraoka T. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Karaki T. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Nishimura K. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan Matthews M. J. Department of Physics, MIT, Cambridge, Massachusetts 02139 Brown S. D. M. Department of Physics, MIT, Cambridge, Massachusetts 02139 Dresselhaus M. S. Department of Electrical Engineering and Computer Science, MIT, Cambridge, Massachusetts 02139 Journal of Materials Research Cambridge University Press 13/7(1998-07), 2023-2030 0884-2914 13:7<2023 1998 13 JMR https://doi.org/10.1557/JMR.1998.0283 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0283 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Endo M. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 700 1- Kim C. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 700 1- Hiraoka T. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 700 1- Karaki T. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 700 1- Nishimura K. Faculty of Engineering, Shinshu University, 500 Wakasato, Nagano 380, Japan NATIONALLICENCE 700 1- Matthews M. J. Department of Physics, MIT, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Brown S. D. M. Department of Physics, MIT, Cambridge, Massachusetts 02139 NATIONALLICENCE 700 1- Dresselhaus M. S. Department of Electrical Engineering and Computer Science, MIT, Cambridge, Massachusetts 02139 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/7(1998-07), 2023-2030 0884-2914 13:7<2023 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge