Most people hear XRD and think of the standard lab scan: peaks plotted against 2θ and a clean diffraction pattern.
That is angle-dispersive XRD.
But there is another version that shows up a lot in synchrotron work, operando experiments, and fast time-resolved studies:
energy-dispersive X-ray diffraction, or EDXRD.
Same physics. Different measurement strategy.
And if you have ever stared at an EDXRD pattern and thought, “why is this peak in energy instead of angle and wtf is my life” this is for you.
A break for battery business..
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XRD review
Materials are crystalline, which means their atoms are arranged in repeating unit cells.
Those unit cells are defined by lattice parameters like a, b, and c.
Inside the crystal, families of atomic planes create characteristic d-spacings.
So the big idea is simple:
structure determines d-spacing
d-spacing determines where diffraction peaks appear
if the structure changes, the peaks move
That is the whole game.
Check out our full Into to XRD here.
TLDR
So the cheat-code summary is:
ADXRD = cleaner structural readout
EDXRD = faster dynamic readout
References:
Li et al., Chemistry of Materials (2020). DOI: 10.1021/acs.chemmater.0c00983
Buchberger et al., Journal of The Electrochemical Society (2015). DOI: 10.1149/2.0721514jes
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