Different sources of the starting materials can influence the properties of the lithium-ion conductors. Two different sources of phosphorous are used to prepare NASICON type lithium-ion conductor Li_1.3Al_0.3Ti_1.7(PO₄)₃ via a hydrothermal-assisted solid-state method in this paper. X-ray diffraction (XRD), Fourier transform infrared spectroscopy and scanning electron microscopy (SEM) are conducted to characterize the structure and morphology. Electrochemical impedance spectroscopy (EIS) is used to characterize the conductivity of the samples. The sample using NH₄H₂PO₄ as phosphorus source exhibits a lower total conductivity than the sample using H₃PO₄ as phosphorus source, which is attributed to the lower relative density and the more porous microstructure obtained in N-LATP. While the more porous microstructure formed in N-LATP is rooted in the loss of driving force for sintering caused by the earlier crystallized rhombohedral phase LiTi₂(PO₄)₃. The porous microstructure results in a tortuous path for lithium ions migration. Different sources of phosphorous can result in different reactions taken place in the hydrothermal reactor, thereby leading to a different particle size distribution, relative density, crystallography and morphology, eventually affecting the lithium ion conduction in the pelletized samples.

起始原料的不同来源会影响锂离子导体的性能。本文通过水热辅助固相法，采用两种不同的磷源制备了NASICON型锂离子导体Li _1.3 Al _0.3 Ti _1.7（PO ₄）₃。进行了X射线衍射（XRD），傅立叶变换红外光谱和扫描电子显微镜（SEM）表征结构和形态。电化学阻抗谱（EIS）用于表征样品的电导率。使用NH ₄ H ₂ PO ₄的样品磷源的总电导率比使用H ₃ PO ₄作为磷源的样品低，这归因于N-LATP中较低的相对密度和更多孔的微观结构。N-LATP中形成的多孔结构更多是由于较早结晶的菱面体相LiTi ₂（PO ₄）₃引起的烧结驱动力损失。。多孔的微结构导致锂离子迁移的曲折路径。磷的不同来源可导致在水热反应器中发生不同的反应，从而导致不同的粒度分布，相对密度，晶体学和形态，最终影响粒状样品中的锂离子传导。