Energy dispersive X-ray diffraction (EDXRD) for operando materials characterization within batteries

Area of Science:

• Materials Science
• Chemistry
• Physics

Background:

• Electrochemical energy storage materials undergo complex structural changes during operation.
• Understanding these changes is crucial for developing advanced batteries.
• Traditional characterization methods may have limitations in probing bulk material evolution.

Purpose of the Study:

• To provide an overview of energy dispersive X-ray diffraction (EDXRD) for studying electrochemical energy storage materials.
• To highlight the capabilities of EDXRD in tracking in-situ crystallographic evolution within battery materials.
• To review applications of EDXRD in various battery chemistries and energy storage mechanisms.

Main Methods:

• Utilizing synchrotron light sources for high-energy, penetrating X-rays.
• Employing energy dispersive X-ray diffraction (EDXRD) to analyze crystallographic changes.
• Defining a well-controlled diffraction gauge volume for precise spatial analysis.
• Applying the technique across multiple synchrotron facilities and beamlines.

Main Results:

• EDXRD allows non-destructive, in-situ monitoring of crystallographic evolution deep within battery materials.
• The technique has been successfully applied to lithium-based and aqueous batteries, including insertion and conversion materials.
• Studies have provided insights into the structural dynamics of materials during electrochemical cycling.

Conclusions:

• EDXRD is a powerful technique for characterizing the evolution of electrochemical energy storage materials.
• The technique offers unique advantages for studying bulk material changes in various battery systems.
• Future developments, such as the HEX beamline, will further enhance capabilities in this field.