Intercalation compounds of fluoroacid as precursors for the syntheses of functional materials

氟酸插层化合物作为功能材料合成的前体

• 批准号: 11650860
• 负责人: HAGIWARA Rika
• 金额: $ 2.18万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650860/
• 关键词: Graphite; Layered compound; Intercalation compound; fluorine; fluoride

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.

对具有第一阶段结构的氟氟粉插入化合物的热分解产物进行了研究。在HF存在下，通过元素氟和石墨反应制备的石墨氟化物包含少量的HF，这是通过与液体氨的反应或在〜250℃时进行加热来消除的。该方法适用于制备均质石墨化合物作为电子材料。 HF在石墨氟化物库中的插入是可逆的。图库中HF分子和石墨氟化物的相互作用足以将化合物的电导率降低一个数量级。第一阶段石墨氟化物具有半离子C-F键，显示高达350°的热稳定性。没有阶段过渡的热分解以高于此温度以产生残留碳。分解演变的氟化合物气体的平均f/c比为1-3。残留的碳具有低结晶度。沿A和C轴的结晶石大小分别为50和5 nm。层的分离也增加了〜14 pm。

项目成果

Yuta Sato,: "Thermal decomposition mechanism of fluorine-graphite intercalation compounds"Carbon. (印刷中). (2001)

Yuta Sato，：“氟石墨插层化合物的热分解机理”Carbon（2001 年出版）。

Yuta Sato, Rika Hagiwara, Yasuhiko Ito: "Thermal decomposition of 1st stage fluorine-graphite intercalation compounds"Journal of Fluorine Chemistry. 110. 31-36 (2001)

Yuta Sato、Rika Hagiwara、Yasuhiko Ito：“第一阶段氟石墨插层化合物的热分解”氟化学杂志。