摘要：本文采用高温固相法制备Y、W、Al掺杂锆酸镧锂离子固体电解质，研究不同Y浓度、不同锂盐前驱体对Y、W、Al掺杂锆酸镧锂离子固体电解质的电导率、相对致密度以及收缩率的影响，并且用X射线衍射和扫描电子显微镜对Y、W、Al掺杂锆酸镧锂离子固体电解质进行晶形结构和显微结构的表征。结果表明：当Y的浓度选用x=0。06mol时，Y、W、Al掺杂锆酸镧锂离子固体电解质的离子导电率为2。35×10-4 s。cm-1，相对致密度为0。9078，收缩率是0。0903，制备的Y、W、Al掺杂锆酸镧锂离子固体电解质是立方相石榴石结构，且电解质断截面的晶粒大小均匀，晶粒之间结合紧密，晶界模糊，颗粒间间隙小。选用Li2CO3作为锂盐前驱体制备的Y、W、Al掺杂锆酸镧锂离子固体电解质的离子导电率为2。56×10-4 s。cm-1，相对致密度为0。9124，收缩率为0。0906，制备的Y、W、Al掺杂锆酸镧锂离子固体电解质是立方相石榴石结构，且电解质断截面的晶粒大小均匀，晶粒之间结合紧密，晶界模糊，颗粒间间隙小。74632

创新点：基于Y、W、Al掺杂锆酸镧锂离子固体电解质在Y的浓度选择及锂盐前驱体的选择方面的研究仍未见报道。

毕业论文关键词： 固体电解质；锂离子电池；锂盐前驱体

Preparation and Properties of Y、W、Al Co - doped in Lanthanum zirconate Lithium- Ion Solid Electrolytes

Abstract：In this paper, Y, W and Al doped lanthanum zirconate lithium ion solid electrolyte were prepared by high temperature solid phase method。 The conductivity of Y, W, Al doped lanthanum zirconate lithium ion solid electrolyte was studied by different Y concentration, Relative density and shrinkage were investigated。 X - ray diffraction and scanning electron microscopy were used to characterize the crystal structure and microstructure of Y, W and Al doped lanthanum lithium phosphate solid electrolyte。 The results show that when the concentration of Y is x = 0。06mol, the ionic conductivity of lanthanum lithium lanthanum lithium ion solid electrolyte is 2。35 × 10-4 s。cm-1, the relative density is 0。9078, The shrinkage rate is 0。0903, the prepared Y, W, Al doped lanthanum zirconate lithium ion solid electrolyte is cubic cubic garnet structure, and the electrolyte cross-section of the grain size uniformity, the grain between the close, grain boundary blurred, The gap is small。 The ion conductivity of Y, W and Al doped lanthanum zirconate lithium ion solid electrolyte prepared by Li2CO3 as the lithium salt precursor was 2。56 × 10-4 s。cm-1, the relative density was 0。9124, the shrinkage was 0。0906, Preparation of Y, W, Al doped lanthanum zirconate lithium ion solid electrolyte is cubic cubic garnet structure, and the electrolyte cross-section of the grain size uniformity, the grain between the close, grain boundary blurred, small inter-particle gap。 

Innovative point: based on Y, W, Al doped lanthanum lithium ion solid electrolyte in the Y concentration selection and lithium salt precursor selection has not been reported。

Keywords: Solid electrolyte; Lithium Ion Battery; Lithium salt precursors

目录

1 绪论 1

1。1 引言 1

1。2 锂离子电池简介 1

1。2。1 锂离子电池原理及其组成部分 3

1。3锂离子电池电解质 5

1。3。1 液态与凝胶电解质 5

1。3。2 固体电解质 6

1。4 论文的研究内容 7

2 实验部分 8

2。1 原料、试剂以及仪器