摘要本论文的主要研究内容是以提高 MoO2 材料的储锂性能为目标,利用高压静电纺 丝技术同时结合高温预氧化和碳化技术制备了 MoO2 颗粒镶嵌纳米多孔碳纤维，并且 研究了它们的电化学性能。采用扫描电镜(SEM)对复合纳米纤维的微观形貌进行表 征，我们发现 PAN 溶液中前驱体浓度不同，碳纳米纤维的表面形貌、结构也有所不 同。使用 X 射线衍射谱(XRD)对前驱体纤维的热分解行为以及中间和最终产物的物 相、组成及结构进行检测分析。根据电化学理论，将所得到的纳米纤维在切片机上制 成我们所需要的纳米纤维片，并在手套箱中组装成 Li 离子电池，测量电池的基本属 性。结果显示以 MoCl5-6%-PMMA4%前驱体溶液形成的碳纳米纤维结构的最终产物 的电化学性能最为优异，高放点容量达到 420mAhg-1，初始库伦效率为 60%，比容量 达到 310mAhg-1。优化设计的 MoCl5-PMMA 溶液制成的碳纳米纤维材料有望成为新 一代锂电池的负极材料。79836

毕业论文关键词：MoO2；静电纺丝；锂离子电池；电化学性能

Abstract The main content of this paper is to improve the performance of lithium storage MoO2 material as the goal, the use of high voltage electrostatic spinning technology combined with high-temperature pre-oxidation and carbonization particles were prepared  MoO2 loaded nanoporous carbon fiber, and investigated their electrochemical properties。Scanning electron microscopy (SEM) on the morphology of the composite nanofibers were characterized, we see different PAN precursor solution concentration, surface morphology of carbon nanofibers,the structure is different。 X-ray diffraction (XRD) on the thermal decomposition behavior of precursor fibers and was intermediate and final products   of   phase composition   and structure   were   detected   and   analyzed。    The electrochemical theory, the resulting nanofiber on a slicing machine made we  need nanofiber sheet, and assembled in a glove box into a Li-ion battery, measure the basic properties of the battery。 The results show that the electrochemical performance for MoCl5-6% -PMMA4% precursor solution formation of the final product carbon nano-fiber structure is most excellent, high discharge capacity of point 420mAhg-1, an initial coulomb efficiency of 60% over capacity reaches 310mAhg- 1。 Optimized design MoCl5-PMMA solution made of carbon nano-fiber material is expected to become a new generation of lithium battery anode material。

Keywords: MoO2; Electrospinning; Li-ion battery; Electrochemical; Performance

目 录

第一章 绪论 1

1。1 引言 1

1。2 碳纳米纤维简介 3

1。3 国内外研究现状 4

1。4 课题研究的意义和主要内容 4

第二章 样品的制备及其表征 6

2。1 实验部分 6

2。1。1 实验原料 6

2。1。2 主要实验仪器 6

2。1。3 材料的制备 6

2。2 锂离子电池的组装及电化学性能测试