| Project/Area Number |
11650860
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
無機工業化学
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
HAGIWARA Rika Kyoto University, Graduate School of Energy Science, Associate Professor, エネルギー科学研究科, 助教授 (30237911)
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| Co-Investigator(Kenkyū-buntansha) |
GOTO Takuya Kyoto University, Graduate School of Energy Science, Research Associate, エネルギー科学研究科, 助手 (60296754)
NOHIRA Toshiyuki Kyoto University, Graduate School of Energy Science, Research Associate, エネルギー科学研究科, 助手 (00303876)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Graphite / Layered compound / Intercalation compound / fluorine / fluoride |
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| Research Abstract |
A study was made on the thermal decomposition products of fluorine-graphite intercalation compounds with a 1st stage structure. Graphite fluoride prepared by the reaction of elemental fluorine and graphite in the presence of HF contains a small amount of HF which is eliminated by the reaction with liquid ammonia or heating at 〜250 ℃. This method is applicable to the preparation of homogeneous graphite compounds as electronic materials. The insertion of HF in the graphite fluoride gallery is reversible. The interaction of the HF molecule and graphite fluoride in the gallery is strong enough to decrease the conductivity of the compound by one order of magnitude. The first stage graphite fluoride possesses a semi ionic C-F bonding to show a thermal stability up to 350 ℃. A thermal decomposition without a stage transition proceeds above this temperature to give a residual carbon. The averaged F/C ratio of the fluorocarbon gases evolved by the decomposition is 1〜3. The residual carbon possesses a low crystallinity. The crystallite size along a and c axes are 50 and 5 nm, respectively. The layer separation is also increased by 〜14 pm.
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