Abstract
The increasing demand for safe and high-energy-density battery systems has led to intense research into solid electrolytes for rechargeable batteries. One of these solid electrolytes is the NASICON-type Li(1+x)Al(x)Ti(2-x)(PO(4))(3) (LATP) material. In this study, different boron compounds (10% B(2)O(3) doped, 10% H(3)BO(3) doped, and 5% B(2)O(3) + 5% H(3)BO(3) doped) were doped at total 10 wt.% into the Ti(4+) sites of an LATP solid electrolyte to investigate the structural properties and ionic conductivity of solid electrolytes using the solid-state synthesis method. Characterization of the synthesized samples was conducted using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The XRD patterns of the boron-doped LATP (LABTP) samples show that the samples have a rhombohedral phase with space group R3¯c together and low amounts of impurity phases. While all the LABTP samples exhibited similar ionic conductivity values of around 10(-4) S cm(-1), the LABTP2 sample doped with 10 wt.% H(3)BO(3) demonstrated the highest ionic conductivity. These findings suggest that varying B(3+) ion doping strategies in LATP can significantly advance the development of solid electrolytes for all-solid-state lithium-ion batteries.