摘要：本文采用高温固相法制备钡钇钨掺杂锆酸镧电解质，考察了不同埋粉量和钨的含量对钡钇钨掺杂锆酸镧电解质电导率、相对致密度、收缩率的影响，用SEM对钡钇钨掺杂锆酸镧电解质进行表征。结果表明，当埋粉量为3g时，钡钇钨掺杂锆酸镧电解质室温下的离子电导率、相对致密度、收缩率分别为1。96×10-4Scm-1、86。68%、9。25%，电镜图显示钡钇钨掺杂锆酸镧电解质的晶粒较大、晶界较少；当钨的含量为0。35mol时，钡钇钨掺杂锆酸镧电解质室温下的离子电导率、相对致密度、收缩率分别为7。47×10-4Scm-1、94。58%、11。43%，电镜图显示钡钇钨掺杂锆酸镧电解质的晶粒较大、晶界较少。77531

本文创新点：基于钡钇钨掺杂锆酸镧电解质在埋粉量的选择和钨的含量的选择方面的研究仍未见报道。 

毕业论文关键词：制备条件；固体电解质；表征；离子电导率

Characterization of Barium Yttrium Tungsten Doped Lanthanum Lanthanum Electrolytes

Abstract: In this paper, barium yttrium tungsten doped lanthanum zirconate electrolyte was prepared by high temperature solid phase method。 The effects of different burnt powder content and tungsten content on the performance of barium yttrium tungsten doped lanthanum zirconate electrolyte were investigated。 XDR and SEM The lanthanum zirconate electrolyte was characterized。 The results show that the ionic conductivity, relative density and shrinkage of barium yttrium tungsten doped lanthanum zirconate electrolyte at room temperature are 1。96 × 10-4S·cm-1, 86。68%, respectively, when the amount of burnt powder is 3g, 9。25%, electron microscopy shows that the grain size of barium yttrium tungsten doped lanthanum tungstate electrolyte is larger and the grain boundary is less。 When the content of tungsten is 0。35mol, barium yttrium tungsten is doped with lanthanum zirconate electrolyte at room temperature The electrical conductivity, relative density and shrinkage were 7。47×10-4S·cm-1, 94。58% and 11。43%, respectively。 The electron microscopy showed that the grain size of the lanthanum-tungsten acid doped lanthanum Fewer sectors。 

The influence of the amount of burial powder and tungsten content on the conductivity, relative density, shrinkage and structure of barium yttrium tungsten doped lanthanum zirconate electrolyte has not been reported。

Key words: preparation conditions; solid electrolyte; characterization; ion conductivity

目录

1 绪论 1

1。1引言 1

1。2锂离子电池 2

1。2。1固体电解质介绍 3

1。2。2石榴石型固体电解质 4

1。3钡、钇、钨元素介绍 5

1。4电导率、致密度、收缩率介绍 5

1。5本文的研究内容 6

2。 实验内容 7

2。1 原料、试剂以及仪器 7

2。2 工艺流程 8

2。3 钡钇钨掺杂锆酸镧电解质的制备 9

2。4 表征方法 9

2。4。1  扫描电子显微镜（SEM） 9

2。4。2  交流阻抗(EIS) 10

3结果与讨论 11

3。1 埋粉量对钡钇钨掺杂锆酸镧电解质性能的影响 11

3。1。1 埋粉量对钡钇钨掺杂锆酸镧电解质在室温下离子电导率的影响