Fast operando X-ray pair distribution function using the DRIX electrochemical cell

DOI: 10.1107/S160057752000747X

Authors: Maria Diaz-lopez (Diamond Light Source; ISIS Facility) , Geoffrey L. Cutts (Diamond Light Source) , Phoebe K. Allan (University of Birmingham) , Dean S. Keeble (Diamond Light Source) , Allan Ross (Diamond Light Source) , Valerie Pralong (Narmandie Université, Ensicaen, Unicaen, CRNS) , Georg Spiekermann (Universität Potsdam) , Philip A. Chater (Diamond Light Source; The Faraday Institution)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 27

State: Published (Approved)
Published: September 2020
Diamond Proposal Number(s): 20893 , 20094

Abstract: In situ electrochemical cycling combined with total scattering measurements can provide valuable structural information on crystalline, semi-crystalline and amorphous phases present during (dis)charging of batteries. In situ measurements are particularly challenging for total scattering experiments due to the requirement for low, constant and reproducible backgrounds. Poor cell design can introduce artefacts into the total scattering data or cause inhomogeneous electrochemical cycling, leading to poor data quality or misleading results. This work presents a new cell design optimized to provide good electrochemical performance while performing bulk multi-scale characterizations based on total scattering and pair distribution function methods, and with potential for techniques such as X-ray Raman spectroscopy. As an example, the structural changes of a nanostructured high-capacity cathode with a disordered rock-salt structure and composition Li4Mn2O5 are demonstrated. The results show that there is no contribution to the recorded signal from other cell components, and a very low and consistent contribution from the cell background.

Journal Keywords: in situ X-ray electrochemical cells; pair distribution function; total scattering; X-ray Raman spectroscopy

Subject Areas: Physics, Materials, Energy


Instruments: I15-1-X-ray Pair Distribution Function (XPDF)

Other Facilities: ID20 at ESRF

Documents:
fv5128.pdf

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