【摘要】 采用熔盐法,以天然鳞片石墨为宿主,NiCl2与FeCl3的混合物为插层剂合成三元FeCl3 NiCl2 GIC。考察了石墨与氯化物的摩尔比、NiCl2与FeCl3的摩尔比、反应温度和反应时间等工艺因素对产物阶结构和产物中Ni与Fe原子比的影响,探讨了NiCl2与FeCl3在石墨层间的插层过程。研究结果表明,改变反应体系中石墨与氯化物的摩尔比、NiCl2与FeCl3的摩尔比、反应温度和恒温时间,可以得到阶结构和Ni/Fe原子比不同的FeCl3 NiCl2 GIC,产物中的Ni/Fe原子比随反应体系中NiCl2与FeCl3的摩尔比的增大、反应温度的提高而增加。当石墨/氯化物的摩尔比为3∶1,NiCl2/FeCl3的摩尔比为3∶7,反应温度为400℃,反应时间为72h时,所得产物为一阶FeCl3 NiCl2 GIC。反应过程中存在FeCl3先插入石墨层间,然后NiCl2逐渐替换FeCl3的插层反应机制。更多还原

【Abstract】 Ternary FeCl₃-NiCl₂-GICs were synthesized by the molten salt method, with natural graphite flake used as host and a mixture of NiCl₂ and FeCl₃ as guest. The effect of molar ratio of carbon to metal chlorides, molar ratio of NiCl₂ to FeCl₃, reaction temperature and reaction time on the stage structure and the Ni/Fe molar ratio of the products, as well as the intercalation reaction process of NiCl₂ and FeCl₃ between graphite layers were studied. The results show that ternary FeCl₃-NiCl₂-GICs with different stage structure and molar ratio of Ni to Fe could be obtained through changing the molar ratio of carbon to metal chlorides, molar ratio of NiCl₂ to FeCl₃, reaction temperature and reaction time. The molar ratio of Ni to Fe of the products increased with increasing molar ratio of NiCl₂ to FeCl₃ and intercalation reaction temperature. When the molar ratio of carbon to metal chlorides is 3∶1 and the molar ratio of NiCl₂ to （FeCl₃） is 3∶7, stage one FeCl₃-NiCl₂-GIC was obtained at 400℃ in three days. The intercalation reaction mechanism may be considered as FeCl₃ being gradually replaced by NiCl₂.更多还原