摘要:本文采用高温固相法对纳米级电解质导电粉进行了制备研究，考察钽浓度、钇浓度、锂浓度、研磨时间、温度的选择、灼烧时间等参数的选择对锂电池电解质导电粉性能的影响。为了制备Li7.06La5Zr1.94Y0.06O12以及原料（La2O3、ZrO2），其室温离子电导率最大为 5.3×10-7 S▪cm-1。本文分别采用LiOH、LiNO、Li2CO3作为Li+的前驱体，其中LiNO和LiOH热分解温度较低，在高温烧结过程中易导致Li2O的挥发，生成的产物中含有大量的La2Zr2O7以及ZrO2、La2O3，室温下离子电导率较低，分别为9.8×10-8 S▪cm-1、2.7×10-7 S▪cm-1，以LI2CO3为原料合成的材料室温下的离子电导率则为5.3×10-7 S▪cm-1。通过高价掺杂取代Zr4+制备了Li7-xLa3Zr2-xTaxO12，其中x=0.4,0.5,0.6。35356
毕业论文关键词: 高温固相法；锂电池；导电率；电池电解质
Preparation of Nano Conductive Powder
Abstract: in this paper, the high temperature solid phase method is adopted to nanoscale electrolyte preparation research was conducted on the conductive powder, tantalum yttrium concentration, concentration and the concentration of lithium, the choice of milling time, temperature, selection of parameters such as calcination time affect the performance of lithium battery electrolyte conductive powder.
In order to prepare Li7.06La5Zr1.94Y0.06O12 and raw materials (La2O3, ZrO2), the ionic conductivity at room temperature maximum 5.3 x10-7 S▪cm-1.This paper uses the LiOH, LiNO, Li2CO3 as the precursor of Li+, LiNO and LiOH thermal decomposition temperature is low, easy cause Li2O volatile in the high temperature sintering process, and the generated products contain a large number of La2Zr2O7 and ZrO2, La2O3, low ionic conductivity at room temperature, respectively 9.8 x 10-8 S▪cm-1, 2.7 x 10-7 S▪cm-1. Li2CO3 as raw materials of synthetic materials in the ionic conductivity at room temperature was 5.3 x 10-7 S▪cm-1
Through high doping replace Zr4+ was prepared Li7-xLa3Zr2-xTaxO12 (x = 0.4, 0.5, 0.6)
Keywords: high-temperature solid-phase method; Lithium battery；electrical conductivity；battery electrolyte
目 录
1 前言.1
1.1 研究意义..1
1.2 锂离子电池.2
2 文献综述 .3
2.1 锂离子电池反应原理3
2.2 锂离子电池的发展前景..3
2.3 锂离子电池电解质 ..3
2.4 实验研究内容4
3 实验部分..5
3.1 仪器与试剂.5
3.2 纳米导电粉的工艺流程..6
3.3 锂离子无机固体电解质Li7La3Zr2O12 的制备7
3.4 锂离子无机固体电解质Li7.06La3Zr1.94Y0.06O12的制备.7
3.5 锂离子无机固体电解质Li7-xLa3Zr2-xTaxO12（x=0.4，0.5,0.6）的制备..7
3.6 锂离子无机固体电解质Li7-x+yLa3Zr2-x-yTaxYyO12的制备7
3.7 结果表征仪器8
3.7.1 X射线衍射（XRD）8
3.7.2 扫描电子显微镜（SEM）9
3.7.3 样品元素成分的定性与半定量分析（EDS）9
3.7.4 交流阻抗（AC）..9
4 结果与讨论10
4.1 锂离子无机固体电解质Li7La3Zr2O1210
4.1. 1 烧结温度对产物Li7La3Zr2O12结构的影响..10
4.1.2 烧结温度对产物Li7La3Zr2O12表面形貌的影响 11
4.1.3 烧结温度对Li7La3Zr2O12室温离子电导率的影响 11
4.2 锂离子无机固体电解质Li7.06La3Zr1.94Y0.06O12 .11
4.2.1 锂盐前驱体对Li7.06La3Zr1.94Y0.06O12结构的影响.12
4.2.2 锂盐前驱体对Li7.06La3Zr1.94Y0.06O12表面形貌的影响 13
4.2.3 锂盐前驱体对Li7.06La3Zr1.94Y0.06O12室温离子电导率的影响 14
4.3 锂离子无机固体电解质Li7-xLa3Zr2-xTaxO12. 15
4.3.1 Ta5+的掺入量对电解质Li7-xLa3Zr2-xTaxO12结构的影响 15 钽钇掺杂镐酸镧导电粉制备工艺的研究:http://www.youerw.com/huaxue/lunwen_33262.html