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1997 Fiscal Year Final Research Report Summary

Chemical Modification of Carbon Materials and Transport Properties of the Resulting Compounds

Research Project

Project/Area Number 08650792
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionTokyo National College of Technology

Principal Investigator

AKUZAWA Noboru  Dept.of Chem.Sci.and Eng., Professor, 物質工学科, 教授 (70042702)

Co-Investigator(Kenkyū-buntansha) NAKANO Masayuki  Dept.of Chem.Sci.and Eng., Assistant, 物質工学科, 助手 (50300546)
TAMADA Koji  Dept.of Electrical Eng., Lecturer, 電気工学科, 講師 (40236740)
TSUCHIYA Ken-ichi  Dept.of Electronic Eng., Associatte Professor, 電子工学科, 助教授 (60188571)
Project Period (FY) 1996 – 1997
Keywordsintercalation / carbon materials / electrical conductivity / magnetoresistance / charge transfer / XPS / cesium / potassium
Research Abstract

Carbon 1s spectra were determined as a function of the composition, K/C,for potassium intercalated graphite. The C1s spectra shifted towards higher energy and broadened with the increase of K/C.The shift was explained on the basis of the fact that the Fermi level shift increases with the increase of K/C as a result of the charge transger from potassium to carbon pi bands.
Alkali metal-graphite intercalation compounds such as CsC_<24> can accomodate various molecules in its interlayr nano-spaces. It is very interesting to know the interaction between alkali metal ions and the penetrating molecules. It was found that the electrical conductivity of CsC_<24> changed remarkably and the effect of sorption temperature on the electical conductivity change was large for the system CsC_<24>-C_2H_2. On the other hand, the change of the electrical conductivity of CsC_<24> was less than 10%, and the temperature effect was small in the case of CsC_<24>-C_2H_4. Those results were discussed from the viewpoint that Cs ions can interact with pi electrons of C_2H_2, but not for C_2H_4.
Effect of the degree of graphitization on the electrical conductivity, magnetoresistance and Hall coefficient of potassium intercalated carbon materials was also determined. Large values of the electrical conductivity and the magnetoresistance were observed for well graphitized material. For poorly graphitized materials, the temperature dependence of the electrical conductivity did not change to metallic one even if the intercalation of potassium took place.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] N.Akuzawa: "Ethylene-Sorprotion Behavior of Alkali Metal-Graphite Intercalation Compounds" Extended Abstracts of The Europian Carbon Conference. Carbon 96. 116-117 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Akuzawa: "Hydrogen Physisorption by Potassium-Intercalated Mesocarbon Microbeads" Extended Abstracts of The Europian Carbon Conference. Carbon 96. 118-119 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿久沢 昇: "GICの新しい反応場への応用" 表面. 35巻. 27-31 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 阿久沢 昇: "炭素材料学会編 新・炭素材料入門(分担執筆)" (株)リアライズ社, (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N,Akuzawa: " "Ethylene-sorption Behavior of Alkali Metal-Graphite Intercalation Compounds"" Extended Abstracts of The European Carbon Conference. 116-117 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Akuzawa: " "Hydrogene-Physisorption by Potassium-Intercalated Mesocarbon Microbeads"" Extended Abstracts of The European Carbon Conference. 118-119 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Akuzawa: " "Application of GIC as a New Reaction Field" (in Japanese)" Hyomen. Vol.35. 27-31 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Akuzawa: " "Introducition to Carbon Materials" ed. by The Carbon Society of JAPAN,(in Japanese)" Realize Co.Ltd.157-162 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-16  

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