有机无机杂化材料的制备转化及性能研究

摘要本课题研究了有机无机杂化材料(MoX2/PANI，X=O，S，Se)的设计、制备及其电化学性能。首先通过软化学方法，液相混合共沉淀制备得到一维的 MoOx-ANI 纳米棒，然后通过原位聚合的方法，使得 ANI 发生聚合，形成 MoOx/PANI。为了进一步增强材料的储锂性能，采取硫化和硒化两种转化方向，通过水热反应和共热两种反应路径，成功制得了 MoS2/PANI 及 MoSe2/PANI。

采用透射电镜、扫描电镜、X 射线衍射、拉曼光谱、红外光谱等表征手段，确定了 MoS2/PANI 及 MoSe2/PANI 的形貌和结构。通过电化学测试发现， MoS2/PANI 及 MoSe2/PANI 的锂电性能较转化之前得到明显改善。如水热硫化的 MoS2/PANI 在 100 mAh g-1 的电流密度下，可逆放电容量保持在 1000 mAh g-1 左右；当电流密度上升到 1A g-1 时，可逆容量仍有 670 mAh g-1。这可能是由于 MoX2 的片层结构比起 MoOx 能提供更多的储锂活性位点；简单的热处理生成了部分无定型碳，体系的导电性也得到提高；另外在 Li+ 插入/脱出的过程中，PANI 稳定住了 X-Mo-X 三明治结构，防止其粉碎及团聚。76004

毕业论文关键词有机无机杂化锂离子电池过渡金属硫族化合物

毕业设计说明书外文摘要

TitleThe research of the preparation, transformation, and performance ofthe organic-inorganic hybrid materials。

Abstract The preparation and electrochemistry storage performance of the organic-inorganic hybrid materials ( MoX2/PANI X= O, S, Se ) has been researched 。We use soft chemistry approach to mix up liquidoid reactants to coprecipitate MoOx-ANI nanorods firstly, followed by the in situ polymerization of ANI to synthesis MoOx/PANI 。To further enhance the lithium storage property, two conversion routes has been adopted including selenylation and vulcanization , two synthesis patterns hydrothermal method and calcination are used in each of them , finally forming MoS2/PANI and MoSe2/PANI。 Transmission electron microscope, scanning electron microscope, X-ray diffraction, infrared spectroscopy, Raman spectrum are employed to ascertain the morphology and structure of the MoS2/PANI and MoSe2/PANI。 By means of electrochemical testing it is discovered that the performance of MoS2/PANI and MoSe2/PANI lithium-ion battery is obviously improved than that of not conversion。 For instance, MoS2/PANI hold excellently high, stable and reversible capacities of 1000mAh g-1。Even the current density is increased to1A g-1, the electrodes still exhibits relatively high capacities of 670mAh g-1。 The excellent storage performance may be attributed to the more active sites for lithium storage supplied by MoX2lamellar structure than that of MoOx。 In addition a bit of amorphous carbon is generated in the process of themal treatment, the electrical conductibility of the system is also enhanced。

Moreover The PANI can enhance the electrical conductivity of hybrids, stabilizing the X-Mo-X sandwich structure, guarding against the aggregation and pulverization, maintaining the higher active sites between electrode/electrolyte interface during Li+ insertion/distraction process。

Keywords organic-inorganic compounds Lithium-ion battery MoX2/PANI

本科毕业设计说明书第 I 页

1引言。。 1

1。1锂离子电池。。 1

1。2 有机无机复合材料。 2

1。3 导电聚合物/硫族化合物复合材料3

1。3。1 导电聚合物。 3 有机无机杂化材料的制备转化及性能研究:http://www.youerw.com/huaxue/lunwen_87088.html