Energy-dispersive diffraction studies of inert anodes

Energy-dispersive X-ray diffraction using an annular beam.

We demonstrate material phase identification by measuring polychromatic diffraction spots from samples at least 20 mm in diameter and up to 10 mm thick with an energy resolving point detector. Within our method an annular X-ray beam in the form of a conical shell is incident with its symmetry axis normal to an extended polycrystalline sample. The detector is configured to receive diffracted flu...

In situ X-ray diffraction studies of (de)lithiation mechanism in silicon nanowire anodes.

Silicon is a promising anode material for Li-ion batteries due to its high theoretical specific capacity. From previous work, silicon nanowires (SiNWs) are known to undergo amorphorization during lithiation, and no crystalline Li-Si product has been observed. In this work, we use an X-ray transparent battery cell to perform in situ synchrotron X-ray diffraction on SiNWs in real time during elec...

CAESAR: A Technique for Angle-Dispersive Powder Diffraction Using an Energy- Dispersive Setup and White Synchrotron Radiation

Introduction We describe a new diffraction technique for Combined Angleand Energy-dispersive Structural Analysis and Refinement (CAESAR), which collects angle-dispersive data by scanning a solid-state detector (SSD) with white synchrotron radiation. We demonstrate the feasibility by analyzing data collected on αAl2O3 at ambient conditions using the Rietveld technique, with varying schemes of da...

Phase Identification Using Series of Selected Area Diffraction Patterns and Energy Dispersive Spectrometry within TEM

Transmission electron microscopy (TEM) is a very powerful technique for materials characterization, providing information relating to morphology, composition, and crystal structure. Selected area diffraction patterns (SADPs) are crystallographic data that can be obtained using a TEM instrument. Conventional identification through SADP/TEM is tricky and tedious, thereby increasing the difficulty...

Energy dispersive x-ray diffraction of charge density waves via chemical filtering