In battery research, X-ray diffraction (XRD) technology provides crucial support for real-time monitoring of structural changes in materials under reaction conditions. For instance, the latest laboratory X-ray diffractometer can capture a complete XRD spectrum within 10 seconds. Key features of this instrument include:
- Utilizes a Ga-In alloy metal-jet X-ray source with brightness reaching 3.2×1010 photons/(s×mm2×mrad2).
- Employs an ellipsoidal mirror with a multilayer coating to deliver quasi-parallel monochromatic light.
- Equipped with a high-efficiency, high signal-to-noise ratio Pilatus 3R 1M detector, specifically designed for rapid charge-discharge conditions in batteries.
These features make this instrument highly effective in studying rapid phase transition processes in lithium-ion batteries, with data quality comparable to synchrotron XRD.
Applications of Micrometre-Resolution X-Ray Diffraction in Highly Absorbing Samples
High spatial resolution XRD technology is essential for studying local strain, residual stress, and grain boundaries in polycrystalline materials. However, the study of highly absorbing samples requires higher photon energies. The six-axis goniometer developed at the PETRA III P06 beamline offers 35 keV photon energy, enabling micrometre-resolution studies of highly absorbing samples. The highlights of this technology include:
- Successfully scanned individual austenite grain boundaries and the lamellar structure of martensitic phases in steel samples.
- Simultaneously assessed microstructure and elemental distribution in thin-film solar cells using a combination of XRD and X-ray fluorescence (XRF).
This innovative combination allows researchers to investigate the mechanisms of performance degradation in photovoltaic materials. For example, XRD can reveal strain field variations and local efficiency reductions in polycrystalline solar cells.
Key Technical Parameters Comparison
The table below summarizes the key parameters of different XRD devices:
| Device Name | Photon Energy (keV) | Spatial Resolution | Application Field |
|---|---|---|---|
| Laboratory X-Ray Diffractometer | 10 | Above 10 seconds | Lithium-ion battery research |
| PETRA III P06 Beamline | 35 | Micrometre-level | Highly absorbing sample research |
| Synchrotron XRD | 30 | Nanometre-level | High-pressure material studies |
In conclusion, XRD technology has played a significant role across multiple fields of materials science. From real-time monitoring of battery structural changes to stress analysis in highly absorbing samples, X-ray diffraction is undoubtedly an essential tool in modern research.