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中文摘要：
以石墨化中间相炭微球（MCMB）为前驱体，采用氧化、微膨胀法制备了微膨胀石墨电极材料（e-MC—MB）；采用X射线衍射仪和扫描电镜表征样品的外貌、结构，并采用恒电流充放电测试和循环伏安法研究了微膨胀石墨电极在LiPR有机电解液体系中的电化学行为。结果表明，微膨胀石墨材料有良好的球形形状，晶体参数La10、Lc和平均堆积碳层数与MCMB相比显著减小；平均层间距d（002）大于石墨材料，在0．411～0．418nm范围；首次充电在4．5～4．8V间存在明显的“电化学活化”现象，储能行为不同于传统石墨材料；在2．5～4．8V电压区间，放电比电容量达143．7F／g；将微膨胀石墨正极材料与石墨负极材料匹配，预计能得到高能量密度的锂离子电容器。
英文摘要：
A mild expanded graphite （e-MCMB） was prepared by oxidation and heat-treatment of MCMB. The morphology and structure of the samples were characterized by XRD and SEM analysis, respectively. The electro- chemical behavior of the samples in LiPF6 electrolyte was studied using galvanostatic charge/discharge test and slow scan rate cyclic voltammograms. The results show and indicate that e-MCMB presented well spherical shape, the values of crystallite parameters of e-MCMB such as La10, Lc and mean stack carbon layers （N） decreased significantly compared with that of MCMB. The mean interlayer distance （d（002） was 0. 411--0. 418nm, which was larger than graphite＇s. There was obvious phenomenon of ＂electricity activation＂ in the first charging potential of 4. 5--4.8V （vs Li）. The energy storage behavior of mild expanded graphite was different with that of graphite, and the specific capacitance was 143.7F/g. The lithium ion capacitor with high energy density could be obtained by matching the expanded graphite anode material and graphite cathode material.
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