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Title: Effect of sorbed molecules on the resistivity of alkali metal-graphite intercalation compounds

Abstract

Alkali metal-graphite intercalation compounds with the composition of MC{sub 24} (M=K, Rb, Cs) were prepared by heating a mixture of MC{sub 8} (saturated compound) and graphite sheet (Grafoil) at 350-450 deg. C. The resistivity perpendicular to the layer planes ({rho} {sub c}) of the resulting compounds was determined by the two-terminal method. The anisotropy factor of the resistivity, ({rho} {sub c}/{rho} {sub a}), of KC{sub 24} prepared from Grafoil was {approx}130, being about 1/6-1/10 in magnitude compared with that of KC{sub 24} prepared from highly oriented pyrolytic graphite. The resistivity change during sorption of hydrogen (at 90 K), ethylene (at 194 K) and acetylene (at 194 K) was determined. The resistivity of MC{sub 24} increased with increase of the sorbed amount of H{sub 2}. The magnitude of the increase was in the order KC{sub 24}>RbC{sub 24}>CsC{sub 24}. This resistivity increase was considered to be due to the expansion along c-direction which reduces the charge-transfer interaction between the carbon layers and potassium ions, resulting in the decrease of the density of the conduction electron. The resistivity of MC{sub 24} increased extensively during sorption of C{sub 2}H{sub 4} and C{sub 2}H{sub 2}. It was discussed in connection with the in-plane structural transitionmore » and chemical interaction between alkali metal ions and sorbed molecules. - Graphical abstract: The resistivity of MC{sub 24} increased with increase of the sorbed amount of H{sub 2}. The magnitude of the increase was in the order KC{sub 24}>RbC{sub 24}>CsC{sub 24}. This resistivity increase was considered to be due to the expansion along c-direction which reduces the charge-transfer interaction between the carbon layers and potassium ions.« less

Authors:
 [1];  [1];  [1];  [1];  [2]
  1. Tokyo National College of Technology, 1220-2 Kunugida, Hachioji-shi, Tokyo 193-0997 (Japan)
  2. Tokyo Polytechnic University, 1583 Iiyama, Atsugi-shi, Kanagawa 243-0297 (Japan)
Publication Date:
OSTI Identifier:
21015726
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 180; Journal Issue: 3; Other Information: DOI: 10.1016/j.jssc.2006.12.019; PII: S0022-4596(06)00651-7; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ACETYLENE; ADSORPTION; ANISOTROPY; CESIUM; CLATHRATES; ETHYLENE; GRAPHITE; HEATING; HYDROGEN; INTERACTIONS; LAYERS; POTASSIUM; POTASSIUM IONS; RUBIDIUM; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0400-1000 K

Citation Formats

Akuzawa, Noboru, Kunihashi, Yoji, Sato, Yuki, Tsuchiya, Ken-ichi, and Matsumoto, Rika. Effect of sorbed molecules on the resistivity of alkali metal-graphite intercalation compounds. United States: N. p., 2007. Web. doi:10.1016/j.jssc.2006.12.019.
Akuzawa, Noboru, Kunihashi, Yoji, Sato, Yuki, Tsuchiya, Ken-ichi, & Matsumoto, Rika. Effect of sorbed molecules on the resistivity of alkali metal-graphite intercalation compounds. United States. https://doi.org/10.1016/j.jssc.2006.12.019
Akuzawa, Noboru, Kunihashi, Yoji, Sato, Yuki, Tsuchiya, Ken-ichi, and Matsumoto, Rika. 2007. "Effect of sorbed molecules on the resistivity of alkali metal-graphite intercalation compounds". United States. https://doi.org/10.1016/j.jssc.2006.12.019.
@article{osti_21015726,
title = {Effect of sorbed molecules on the resistivity of alkali metal-graphite intercalation compounds},
author = {Akuzawa, Noboru and Kunihashi, Yoji and Sato, Yuki and Tsuchiya, Ken-ichi and Matsumoto, Rika},
abstractNote = {Alkali metal-graphite intercalation compounds with the composition of MC{sub 24} (M=K, Rb, Cs) were prepared by heating a mixture of MC{sub 8} (saturated compound) and graphite sheet (Grafoil) at 350-450 deg. C. The resistivity perpendicular to the layer planes ({rho} {sub c}) of the resulting compounds was determined by the two-terminal method. The anisotropy factor of the resistivity, ({rho} {sub c}/{rho} {sub a}), of KC{sub 24} prepared from Grafoil was {approx}130, being about 1/6-1/10 in magnitude compared with that of KC{sub 24} prepared from highly oriented pyrolytic graphite. The resistivity change during sorption of hydrogen (at 90 K), ethylene (at 194 K) and acetylene (at 194 K) was determined. The resistivity of MC{sub 24} increased with increase of the sorbed amount of H{sub 2}. The magnitude of the increase was in the order KC{sub 24}>RbC{sub 24}>CsC{sub 24}. This resistivity increase was considered to be due to the expansion along c-direction which reduces the charge-transfer interaction between the carbon layers and potassium ions, resulting in the decrease of the density of the conduction electron. The resistivity of MC{sub 24} increased extensively during sorption of C{sub 2}H{sub 4} and C{sub 2}H{sub 2}. It was discussed in connection with the in-plane structural transition and chemical interaction between alkali metal ions and sorbed molecules. - Graphical abstract: The resistivity of MC{sub 24} increased with increase of the sorbed amount of H{sub 2}. The magnitude of the increase was in the order KC{sub 24}>RbC{sub 24}>CsC{sub 24}. This resistivity increase was considered to be due to the expansion along c-direction which reduces the charge-transfer interaction between the carbon layers and potassium ions.},
doi = {10.1016/j.jssc.2006.12.019},
url = {https://www.osti.gov/biblio/21015726}, journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = 3,
volume = 180,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}