Combining operando synchrotron X-ray tomographic microscopy and scanning X-ray diffraction to study lithium ion batteries - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2016

Combining operando synchrotron X-ray tomographic microscopy and scanning X-ray diffraction to study lithium ion batteries

Résumé

We present an operando study of a lithium ion battery combining scanning X-ray diffraction (SXRD) and synchrotron radiation X-ray tomographic microscopy (SRXTM) simultaneously for the first time. This combination of techniques facilitates the investigation of dynamic processes in lithium ion batteries containing amorphous and/or weakly attenuating active materials. While amorphous materials pose a challenge for diffraction techniques, weakly attenuating material systems pose a challenge for attenuation-contrast tomography. Furthermore, combining SXRD and SRXTM can be used to correlate processes occurring at the atomic level in the crystal lattices of the active materials with those at the scale of electrode microstructure. To demonstrate the benefits of this approach, we investigate a silicon powder electrode in lithium metal half-cell configuration. Combining SXRD and SRXTM, we are able to (i) quantify the dissolution of the metallic lithium electrode and the expansion of the silicon electrode, (ii) better understand the formation of the Li15Si4 phase, and (iii) non-invasively probe kinetic limitations within the silicon electrode. A simple model based on the 1D diffusion equation allows us to qualitatively understand the observed kinetics and demonstrates why high-capacity electrodes are more prone to inhomogeneous lithiation reactions
Fichier principal
Vignette du fichier
Scientific_Reports_6_27994.pdf (4.72 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01572838 , version 1 (08-08-2017)

Identifiants

Citer

Patrick Pietsch, Michael Hess, Wolfgang Ludwig, Jens Eller, Vanessa Wood. Combining operando synchrotron X-ray tomographic microscopy and scanning X-ray diffraction to study lithium ion batteries. Scientific Reports, 2016, 6, 10 p. ⟨10.1038/srep27994⟩. ⟨hal-01572838⟩
93 Consultations
121 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More