X-ray absorption spectrum is only sensitive to the near-neighbor structure of the target atom and does not depend on the long-range ordered structure. The analysis of XAFS spectra can obtain the information about the local atomic and electronic structure of the target element in the material. XAFS has become an important accurate characterization method in the field of catalysis and battery materials research.
1 Field of electrocatalysis
XAFS technology has been widely applied and developed in the field of catalysis in recent years, an important part of which is in the research of electrocatalytic reactions. XAFS can provide a lot of valuable information for catalyst research, mainly in two aspects. The first is the valence information of elements in catalyst, which can be obtained by XANES analysis. The other is the coordination information of the elements in the catalyst, which can be obtained by EXAFS analysis.
3 Battery field
In recent years, with the continuous improvement of synchrotron radiation source related technologies, X-ray absorption spectrum has become more and more prominent in the research of battery materials. In addition, XAFS technology can also perform in-situ tests to analyze the changes in the valence state and structure of the material during the battery charging and discharging process.
