Growth and characterization of Li7La3Zr2O12 single crystals by using floating zone method for use as fast Li-ion conductor†

Abstract

Abstract Large size high quality Li7La3Zr2O12 single crystals were grown successfully by floating zone (FZ) technique. The grown crystals were characterized by X-ray diffraction, etch pits density measurement, Impedance analysis, Vibrating sample magnetometry (VSM) and UV-Visible spectrometry. The investigation of structural, electrical, optical properties and defect density of the Li7La3Zr2O12 single crystals revealed that the crystals were high quality and free from defects. The chemical analysis showed that the grown crystals have uniform composition along cross-section and growth direction. The floating zone grown single crystals contain no low-angle grain boundaries, indicating that they can be used for high efficiency Li-ion batteries.