摘要：本文通过高温固相反应法制备了钡钇钨掺杂锆酸镧固体电解质，分别研究了不同锂盐含量、保温时间对钡钇钨掺杂锆酸镧固体电解质的离子电导率、相对致密度、收缩率的影响，并观察分析钡钇钨掺杂锆酸镧固体电解质的SEM、XRD图。结果表明：当加入锂盐含量为过量20%，制备的钡钇钨掺杂锆酸镧固体电解质室温下离子电导率为2。92×10-4 Scm-1，相对致密度为90。45%，收缩率为10。09%，晶粒较少，几乎看不到晶界，晶面平滑；当保温时间为10h，制备的钡钇钨掺杂锆酸镧固体电解质室温下离子电导率为7。47×10-4 Scm-1，相对致密度为94。58%，收缩率为11。43%，几乎观察不到明显的晶界，在保温时间6 h~14 h制备的固体电解质为立方相石榴石结构。本文的创新点是钡钇钨掺杂锆酸镧固体电解质的研究未见报道。79580

毕业论文关键词： 钡钇钨掺杂锆酸镧固体电解质；锂盐含量；保温时间 

Study on preparation technology of barium yttrium tungsten doped lanthanum zirconate electrolyte

Abstract: The preparation of barium yttrium tungsten doped lanthanum zirconate solid electrolyte by high temperature solid phase reaction method were studied in different salt content, ion conductivity and heat preservation time on barium yttrium tungsten doped lanthanum zirconate solid electrolyte relative effects of relative density and shrinkage, and the observation and analysis of barium yttrium tungsten doped lanthanum zirconate solid electrolyte SEM figure, XRD。 The results show that: when adding lithium content in excess of 20%, the preparation of barium yttrium tungsten doped lanthanum zirconate solid electrolyte ionic conductivity at room temperature is 2。92 * 10-4 Scm-1, the relative density is 90。45% and the shrinkage rate is 10。09%, the grain is less, almost can not see the grain crystal surface smoothing; when the holding time is 10h。 The preparation of barium yttrium tungsten doped lanthanum zirconate solid electrolyte ionic conductivity at room temperature is 7。47 * 10-4 Scm-1, the relative density is 94。58% and the shrinkage rate was 11。43%, there was almost no obvious boundary, in 6 h~14 h solid electrolytic synthesis of cubic garnet structure。 The innovation of this paper is that there have been no reports about barium, yttrium and tungsten doped lanthanum tungstate solid electrolyte。

Key Words：Barium yttrium tungsten doped zirconium acid lanthanum solid electrolyte; Lithium salt content; Heat preservation time; 

目录

1 绪论 1

1。1 引言 1

1。2 锂离子电池 1

1。2。1 锂离子电池的发展历程 2

1。2。2 锂离子电池的工作原理 3

1。3 锂离子电池电解质 3

1。3。1 有机液体电解质 4

1。3。2 聚合物电解质 4

1。3。3 无机固体电解质 4

1。4 有关钡钇钨掺杂锆酸镧固体电解质的研究 4

1。5 论文的研究内容 5

2实验内容 6

2。1 实验试剂、原料和仪器 6

2。2 实验方法 7

2。3制备钡钇钨掺杂锆酸镧固体电解质的原料的质量 7

2。4 表征方法 8

2。4。1 交流阻抗法（EIS）