目录锂离子电池负极材料Fe3O4空心微球的合成及电性能研究....................................................................................1前言...............................................................................................................................................................................21实验部分.....................................................................................................................................................................31.1实验主要试剂及仪器..............................................................................................................................................31.2材料的合成...............................................................................................................................................................32材料的表征与测试......................................................................................................................................................32.1材料的结构及形貌表征...........................................................................................................................................4（1）X-射线衍射分析（XRD）.....................................................................................................................................4（2）材料形貌分析.......................................................................................................................................................42.2电极制备与电池组装..............................................................................................................................................42.3电化学测试...............................................................................................................................................................4（1）充放电性能测试...................................................................................................................................................43实验结果与讨论.........................................................................................................................................................54结论..............................................................................................................................................................................9参考文献.........................................................................................................................................................................9锂离子电池负极材料Fe3O4空心微球的合成及电性能研究摘要通过简单的一步溶剂热法制备了中空Fe3O4微球作为可充电锂离子电池（LIB）的负极材料。所制备的中空Fe3O4微球大小分布非常均匀，没有明显团聚现象，平均直径为300nm，其中内径约200nm。作为LIB的负极材料，该空心Fe3O4微球表现出优异的倍率性能和循环性能。在电流密度0.5C(500mAg-1)下循环时，首次放电比容量为1300.1mAh·g-1，350次循环后，容量仍稳定在约613.1mAhg-1，库仑效率接近98％。优异的电性能可归因于空心结构不仅增大活性材料与电解液的接触面积，缩短锂离子扩散距离，能更有效的缓冲充电放过程中的体膨积胀，增强电极料材的环循定稳性。关键词四氧化三铁；空心球；溶剂热；锂离子电池；负极材料SynthesisandElectricalPropertiesofFe3O4HollowSpheresasAnodeMaterialforLithium-ionBatteriesAbstractHollowFe3O4microsphereswerepreparedviasimpleone-stepsolvothermalmethodasanodematerialofrecharge...
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