Preparation and Characterisation of LAITP/PVDF Composite Solid Electrolyte for Lithium Battery

Abstract

This study investigates the potential of LAITP/PVDF composite electrolytes to improve the safety and performance of lithium-ion batteries. The study focuses on the synthesis and characterization of composite solid electrolyte consisting of indium-doped lithium aluminum titanium phosphate (LAITP) ceramic material and LiClO4 salt with polyvinylidene fluoride (PVDF) as the polymer matrix. The LAITP ceramic, synthesized via solid-state synthesis, demonstrates high ionic conductivity, thermal stability, and mechanical robustness. PVDF provides electrochemical and thermal stability to the composite. The composite electrolytes were prepared by integrating LAITP into the PVDF matrix through the solution casting method. Various characterization methods were employed to assess the properties of the resulting composite. X-ray diffraction (XRD) was used to examine the crystal structure, while scanning electron microscopy (SEM) provided insights into the morphological features. Ionic conductivity measurements were conducted using electrochemical impedance spectroscopy (EIS), enabling an evaluation of the composite's electrochemical performance. The LAITP-reinforced PVDF-based composite solid electrolyte exhibited an ionic conductivity of 1.7 × 10⁻5 S cm⁻1 at room temperature.

Keywords

• LATP ceramic electrolyte
• PVDF polymer electrolyte
• Composite electrolyte

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