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X-ray Nanocomputed Tomography in Zernike Phase Contrast for Studying 3D Morphology of Li–O2 Battery Electrode

Journal Article · · ACS Applied Energy Materials
 [1];  [2];  [3];  [1];  [2];  [4];  [5]
  1. Univ. de Picardie Jules Verne, Amiens (France). Lab. de Reactivite et Chimie des Solides (LRCS); Reseau sur le Stockage Electrochimique de l'Energie (RS2E), Amiens (France)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. Univ. de Picardie Jules Verne, Amiens (France). Lab. de Reactivite et Chimie des Solides (LRCS); Nanyang Technological Univ. (Singapore)
  4. Univ. de Picardie Jules Verne, Amiens (France). Lab. de Reactivite et Chimie des Solides (LRCS); Reseau sur le Stockage Electrochimique de l'Energie (RS2E), Amiens (France); Inst. Univ. de France, Paris (France); ALISTORE-European Research Inst., Amiens (France)
  5. Univ. de Picardie Jules Verne, Amiens (France). Lab. de Reactivite et Chimie des Solides (LRCS); Reseau sur le Stockage Electrochimique de l'Energie (RS2E), Amiens (France); ALISTORE-European Research Inst., Amiens (France)
+ Show Author Affiliations

In this work, we investigated the lithium peroxide (Li2O2) and pore size distribution in lithium-O2 battery electrodes at different states of charge using transmission X-ray microscopy coupled with Zernike phase contrast to carry out nano-Computed Tomography. We report that such technique enables, at the nanoscale, to distinguish light elements such as carbon and Li2O2 in Li-O2 battery cathode electrodes. We verified by wave-propagation simulation that this approach efficiently improves the contrast of images in comparison with the pure absorption. The Li2O2 distribution and thickness, interphases, and pore network are visualized and quantified, which give a valuable insight into our cathode architecture. From this 3D analysis, we highlight modifications of the air-cathode morphology and the Li2O2 spatial organization as well as their potential implication in terms of carbon surface passivation and pore-clogging. After the full recharge process, this technique can also reveal the spatial distribution of the residual Li2O2 and other byproducts.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1785721
Journal Information:
ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 5 Vol. 3; ISSN 2574-0962
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

25 ENERGY STORAGE
Li-O2 battery
Li2O2 spatial organization
Zernike phase contrast
batteries
electrode architecture characterization
electrodes
oxides
tomography
x-ray nanocomputed tomography
x-rays