摘要近年来,无机氧化物固体电解质以其安全性,较高的离子电导率吸引许多研究者的兴趣。
本论文介绍了近年固体电解质的研究进展,本实验方法选用多数无机氧化物固体电解质的合成方法—传统固相合成法,在空气环境条件下合成Li2O-ZrO2-SiO2体系的无机固体电解质,通过X射线衍射鉴定从980℃到1060℃(每隔20℃)不同烧结温度下本体系无机固体电解质多晶态物相,应用电化学工作站测定AC阻抗,计算不同烧结温度下离子电导率,还测试了电解质片的收缩率,并采用阿基米德排水法测试固体电解质片的密度。
阻抗结果显示这种材料在1000℃的烧结温度下,显示了最大的锂离子电导率2.6651×10-3Ω-1cm,收缩率和密度有较好的一致性,烧结温度在1020℃后密度稍微有些降低。
比较其他无机氧化物电解质,本体系烧结温度较低,同时获得了较高的锂离子电导率,丰富了无机氧化物电解质体系。
关键词:固体电解质;LZSO(Li2O-ZrO2-SiO2);锂离子电导率AbstaractIn recent years, inorganic oxide solid electrolyte has attracted many researchers interests for its safety, high ionic conductivity. This paper describes research progress of solid electrolytes in recent years, most of the experimental method used in the synthesis of inorganic oxide solid electrolyte method - traditional solid-state synthesis, synthesis in air condition system Li2O-ZrO2-SiO2 inorganic solid electrolyte, by using the X-ray diffraction identified from the 980 ℃to 1060 ℃ (every 20 ℃) under different sintering temperature of the system of multi-crystalline inorganic solid electrolyte , AC impedance measured in air at room temperature by electrochemical work-station , calculated in different sintering temperature lithium ion conductivity, also tested shrinkage ratio of the solid electrolyte pellets, and measured bulk density of solid electrolyte pellets using Archimedes method. Impedance results showed that the material in the sintering temperature of 1000 ℃, showed the largest lithium-ion conductivity 2.6651×10-3Ω-1cm, the shrinkage ratio and bulk density are in good agreement, after 1020 ℃sintering temperature slightly lower density. Compared with other inorganic oxide electrolyte sintering temperature of the system is lower, while access to a high lithium ion conductivity and enriched inorganic oxide electrolyte system.Keywords:solid electrolyte;Li2O-ZrO2-SiO2 ;lithium ion conductivity目录引言 ................................................................................................................................... - 1 - 第一章文献综述 ............................................................................................................. - 2 -1.1 锂电池发展概述................................................................................................. - 2 -1.1.1采用锂负极的金属锂电池(LB) ............................................................... - 2 -1.1.2采用插锂化合物的液态锂离子电池(LIB ) ............................................. - 3 -1.1.3采用聚合物电解质的聚合物锂离子电池(PLIB ) ................................... - 4 -1.1.4采用全固态技术的锂离子电池............................................................... - 5 -1.2 固体电解质......................................................................................................... - 6 -1.2.1 固体电解质的发展历史.......................................................................... - 7 -1.2.2 著名固体电解质的研究现状.................................................................. - 8 -1.2.3 固体电解质的研究手段........................................................................ - 11 - 第二章实验部分 ........................................................................................................... - 13 -2.1原料设备及研究方法........................................................................................ - 13 -2.2 主要仪器设备:............................................................................................... - 14 -2.2.1 X-射线衍射分析..................................................................................... - 14 -2.2.2 交流阻抗分析........................................................................................ - 14 -2.2.3 压力设备................................................................................................ - 14 -2.2.4 其他基本仪器设备................................................................................ - 14 -2.3实验原理及工艺流程........................................................................................ - 14 -2.3.1 实验原理................................................................................................ - 14 -2.3.2 固相烧结法工艺流程............................................................................ - 15 -2.3.3 实验方案................................................................................................ - 16 -2.3.4 样品的性能测试.................................................................................... - 17 -2.4 Li2O-ZrO2-SiO2体系固体电解质的制备与性能 ........................................... - 18 -2.4.1 烧结温度对Li2O-ZrO2-SiO2体系固体电解质收缩率的影响........... - 18 -2.4.2 烧结温度对Li2O-ZrO2-SiO2体系固体电解质密度的影响 .............. - 19 -2.4.3 烧结温度对Li2O-ZrO2-SiO2体系固体电解质物相的影响 .............. - 20 -2.4.4 烧结温度对Li2O-ZrO2-SiO2体系固体电解质阻抗的影响 .............. - 22 -第三章:结论 ................................................................................................................. - 26 - 参考文献 ......................................................................................................................... - 27 - 致谢 ................................................................................................................................. - 28 -引言众所周知,化石燃料燃烧以及生物排放所产生的废气,不仅污染了那些大且现代化的城市而且造成了后果令人不寒而栗的温室效应。