PEG基复合固体电解质与Al的阳极键合性能研究

为了探究PEG基固体电解质与金属的阳极键合性能,本文以聚乙二醇(PEG)为基体,引入LiClO4提供导电粒子,并采用纳米颗粒(CeO2、SiO2)对其络合物进行改性,制备了PEG基复合固体电解质(PEG)10LiClO4-SiO2和(PEG)10LiClO4-CeO2,研究了其与铝的阳极键合性能.通过交流阻抗、X射线衍射、SEM扫描电镜、力学实验及阳极键合实验等对所制备样品进行分析和表征.研究发现,经过碱金属锂盐及无机纳米颗粒改性后,破坏了PEG材料原有的分子结构,有效抑制了材料内部结晶,促进了离子迁移,提高了基体的室温电导率及力学性能.本文所制备的PEG基复合固体电解质与铝成功实现了阳极键合连接,(PEG) 10 LiClO4-8wt.％ CeO2与Al的阳极键合性能最佳,在结合界面处所生成的键合层是其连接的关键因素.

Study on anode bonding properties of PEG-based composite solid electrolyte and Al

In order to explore the anodic bonding performance of PEG-based solid electrolytes and metals, polymer material PEG (polyethylene glycol) was used as the matrix, LiClO₄ was selected to provide conductive particles, and the complexes were modified by nanoparticles (CeO₂,SiO₂). Finally, ion conductive solid electrolytes (PEG)₁₀LiClO₄-SiO₂ and (PEG)₁₀LiClO₄-CeO₂ were prepared, and their anodic bonding properties were investigated. The prepared samples were analyzed and characterized by AC impedance, X-ray diffraction, scanning electron microscopy (SEM), tensile strength and anodic bonding experiments. It was found that the modification destroyed the original molecular structure of PEG, inhibited the internal crystallization of the material effectively, promoted ion migration, improved the room temperature conductivity, and increased the mechanical properties. The prepared solid electrolyte was joined with aluminum successfully, (PEG)₁₀LiClO₄-8wt.%CeO₂ had the best anodic bonding performance with Al, and the bonding layer formed at the bonding site was a key factor in its connection.