Abstract:
Synchrotron-based high-resolution powder X-ray diffraction (HRPXRD) at TPS19A beamline is an advanced characterization platform designed to probe modern functional materials. These functional materials are usually highly heterogeneous, multi-component systems optimized for electronic and ionic transport rather than to exhibit ideal diffraction qualities; consequently, conventional laboratory diffractometers often lack the resolution required to explore their complex microstructural features. By delivering exceptional angular resolution (Δ2θ ≈ 0.003o), narrow peak profiles (FWHM ≈ 0.03o), wide 2θ coverage range (≈ 90o), precise geometric calibration, and rapid data acquisition within seconds, high-quality measurements at TPS19A enable researchers to resolve the subtle structural variation and index complex multiphase specimen. Beyond standard crystallographic calibrants, this presentation highlights the capability of TPS19A on non-ideal sample systems, specifically battery active materials captured in metastable states induced by electrochemical or thermal phase transitions. Fully quantitative crystallographic parameters—such as minor lattice variations, complex phase compositions, atomic defects, and nanoscale domain sizes—are successfully extracted through full-pattern Rietveld refinement. Ultimately, these advanced HRPXRD capabilities establish TPS 19A as an indispensable facility for bridging the gap between static atomic-scale structural determination and real-time operational dynamics in next-generation energy storage materials.
Keywords – Li-ion battery, electrode materials, powder diffraction