固体电解质的制备及其在锂氧电池性能研究

Preparation of Solid lectrolyte and Its Properties in Lithium-oxygen Battery

摘要:

本文提出了将高离子电导率的全固态电解质Li1.4Al0.4Ti1.6(PO3)4(LATP)用于锂氧电池。用Pechini法成功的合成了全固态电解质，采用X射线荧光衍射(XRD)、场发射扫描电子显微镜(SEM)和电化学性能分析其性能。结果显示，LATP不仅具有较高的离子导电性，而且LATP作为固体电解质，具有更高的放电平台。同时，LATP固体电解质能降低电解质的分解，从而能够减少放电产物的生成。因此，LATP玻璃陶瓷固体用于锂氧电池提高了锂氧电池的热稳定性并且降低了锂氧电池热膨胀。LATP固体电解质利用在可再充电锂氧电池中具有良好的前景。

Abstract:

In this paper, the all-solid-state with high ionic conductivity electrolyte Li1.4Al0.4Ti1.6(PO3)4 (LATP) used for lithium-oxygen battery. The LATP has been successfully synthesized by Pechini-type method and characterized by X-ray powder diffraction analysis (XRD), field emission scanning electron microscopy (FESEM) and electrochemical performance. Through the analysis of electrochemical performance, LATP not only has high ionic conductivity, but also has a higher discharge platform as LATP solid electrolyte. At the same time, LATP solid electrolyte can reduce the decomposition of electrolyte, thereby reducing the generation of discharge products. Moreover, LATP solid electrolyte reduces the decomposition of the electrolyte, and thus reduces the formation of undesired discharge products. Therefore, the use of LATP glass ceramics for lithium Oxygen Batteries improves the thermal stability of lithium oxygen batteries and reduces the thermal expansion of lithium oxygen batteries. Therefore, LATP glass ceramic solid is used by lithium oxygen battery to improve the thermal stability of lithium oxygen battery and reduce the thermal expansion of lithium oxygen battery. The LATP solid electrolyte has a good prospect in the rechargeable lithium-oxygen battery.