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Effects of Host and Organic solvent for the Intercalation of Sodium into Carbon Materials

主体和有机溶剂对钠嵌入碳材料的影响

基本信息

批准号：
09450322
负责人：
INAGAKI Michio
金额：
$ 3.58万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

In the present work, intercalation of alkali metals, particularly sodium, from their ether solutions into cokes and pyrolytic carbons heat-treated at different temperatures were investigated in order to accumulate the knowledge on the intercalation into poorly crystallized carbon materials and clarifying the effect of host.Host effects on the intercalation of. alkali metals from their solutions of tetrahydrofuran(THF) and 1,2-dimethoxyethane(DME) were studied. The larger or the more weakly coordinated complexes of alkali metals with solvent molecules was the easier to be hindered from intercalation into poorly crystallized cokes. Host effect on the intercalation of alkali metals from their solutions of 2-methyltetrahydrofuran(MeTHF) solution was discussed. Although sodium were known to have a crystallographic mismatching with carbon hexagonal layers in graphite gallery, pyrolytioc carbons were considered to be favorable to be expanded and intercalated by both sodium and MeTHF because of their good planar orientation. The intercalation of sodium from its solutions of ethers with different carbon chains were investigated using cokes with different crystallinity, It was found coke with the lower crystallinity has the stronger resistance to hinder from the co-intercalation of ether molecules. The complexes with the weaker coordination between sodium and ethers and the more voluminous one were the more difficult to intercalate with co-intercalation of ether molecules. Host effects for the intercalation of iron chloride in its nitromethane solution were also investigated. Degradation of host carbon particles was also related to the intercalation of voluminous coordinated complexes into carbon gallery.Three factors, texture of the host, size (i.e., coordination structure) of guest intercalate complexes and strength of coordination bonds in the complexes were found to be important to determine the formation and the structure of intercalation compounds.

本文研究了碱金属，特别是钠从其乙醚溶液中插入到不同温度热处理的焦炭和热解炭中，以积累对插入到低结晶炭材料中的知识，并阐明主体的作用。研究了碱金属从四氢呋喃（THF）和1，2-二甲氧基乙烷（DME）溶液中的分离。碱金属与溶剂分子的络合物越大或配位越弱，越容易被阻碍嵌入结晶不良的焦炭中。讨论了碱金属从2-甲基四氢呋喃（MeTHF）溶液中插层的主体效应。虽然钠与石墨层中的碳六方层存在晶体学失配，但热解碳由于其良好的平面取向而被认为有利于被钠和MeTHF膨胀和插入。用不同结晶度的焦炭研究了钠从不同碳链的醚类溶液中的插层行为，发现结晶度越低的焦炭对醚类分子的共插层阻碍能力越强。钠与醚类配位越弱、体积越大的复合物越难与醚类分子共插层。研究了氯化铁在其硝基甲烷溶液中插层的主体效应。主体碳颗粒的降解也与大量配位络合物插入碳廊有关。客体插层复合物的配位结构和复合物中配位键的强度对插层复合物的形成和结构有重要的影响。