Synthesis and Characterization of High-conductive and Stable Graphite Intercalation Compounds

高导稳定石墨插层化合物的合成与表征

• 批准号: 08650994
• 负责人: TAKAHASHI Yoichi
• 金额: $ 1.34万
• 依托单位: CHUO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650994/
• 关键词: Graphite Intercalation compounds; High-conductive compounds

In this study, ternary graphite intercalation compounds of alkali metal-unsaturated organic molecules-graphite have been synthesized, and their structure and electrical conductivity, together with their stability in the air, have been investigated. The results obtained are as follows.1. Rubidium-and potassium-graphite intercalation compounds (Rb-GICs and K-GICs) of the stage-2 structure were used as host materials, in addition to cesium-graphite intercalation compounds (Cs-GICs), and were allowed to react with ethylene gas to form the ternary compounds. The ternary K-GICs showed different sorption behavior from that of the ternary Cs-GICs, and the layr structure of the ternary K-GICs is also apparently different. It has been revealed that the ternary Cs-GICs have the most stable structure in the air and their electrical conductivity has been kept at high level for a considerably long time.2. Cs-GICs were allowed to react with several unsaturated organic molecules such as acrylonitrile, benzene etc., and the structure and electrical conductivity of resulting ternary GICs were investigated. Gas phase acrylonitrile was sorbed into CsC_<24> very slowly at 300 K,and the saturated composition was CsC_<24> (AN) _<1.4>. The ternary GIC was stable in vacuum, but decomposed slowly in the air. In order to improve the stability of the ternary in the air, the sample was heat-treated at 323 K for 150 hrs to enhance the oligomerization of acrylonitrile molecules. The results shows, however, very little effects in the stability of the ternary GIC.In conclusion, the ternary system, cesium-ethylene-graphite GICs are considered to be most promising as the high-electrical conductive and stable materials.

本文合成了碱金属-不饱和有机分子-石墨三元石墨层间化合物，并对其结构、导电性和在空气中的稳定性进行了研究。研究结果如下：1.除了铯-石墨插层化合物（Cs-GIC）之外，还使用第2阶段结构的铷-和钾-石墨插层化合物（Rb-GIC和K-GIC）作为主体材料，并且允许其与乙烯气体反应以形成三元化合物。三元K-GIC的吸附行为与三元Cs-GIC不同，其层状结构也明显不同。结果表明，三元Cs-GIC在空气中具有最稳定的结构，其电导率在相当长的时间内保持在较高的水平. Cs-GIC可以与丙烯腈、苯等不饱和有机分子反应，并对所得三元GIC的结构和导电性进行了研究。在300 K时，气相丙烯腈在CsC_（AN）_2上的吸附<24>速度很慢，饱和组成为CsC_<24>（AN）_2<1.4>。三元GIC在真空中稳定，但在空气中分解缓慢。为了提高三元共聚物在空气中的稳定性，将样品在323 K下热处理150 h，以促进丙烯腈分子的齐聚。结果表明，铯-乙烯-石墨三元系GIC的稳定性受到的影响很小，是最有前途的高导电稳定材料。