Tan, C;
Heenan, T;
Ziesche, R;
Daemi, S;
Hack, J;
Maier, M;
Marathe, S;
... Shearing, P; + view all
(2018)
Four-Dimensional Studies of Morphology Evolution in Lithium–Sulfur Batteries.
ACS Applied Energy Materials
, 1
(9)
pp. 5090-5100.
10.10214/acsaem.8b01148.
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Abstract
Lithium sulfur (Li–S) batteries have great potential as a successor to Li-ion batteries, but their commercialization has been complicated by a multitude of issues stemming from their complex multiphase chemistry. In situ X-ray tomography investigations enable direct observations to be made about a battery, providing unprecedented insight into the microstructural evolution of the sulfur cathode and shedding light on the reaction kinetics of the sulfur phase. Here, for the first time, the morphology of a sulfur cathode was visualized in 3D as a function of state of charge at high temporal and spatial resolution. While elemental sulfur was originally well-dispersed throughout the uncycled cathode, subsequent charging resulted in the formation of sulfur clusters along preferred orthogonal orientations in the cathode. The electrical conductivity of the cathode was found not to be rate-limiting, suggesting the need to optimize the loading of conductive carbon additives. The carbon and binder domain and surrounding bulk pore phase were visualized in the in situ cell, and contrast changes within both phases were successfully extracted. The applications of this technique are not limited to microstructural and morphological characterization, and the volumetric data can serve as a valuable input for true 3D computational modeling of Li–S batteries.
| Type: | Article |
|---|---|
| Title: | Four-Dimensional Studies of Morphology Evolution in Lithium–Sulfur Batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.10214/acsaem.8b01148 |
| Publisher version: | https://pubs.acs.org/doi/10.1021/acsaem.8b01148 |
| Language: | English |
| Additional information: | © 2018 American Chemical Society. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | batteries, in situ characterization, lithium sulfur, porous media, synchrotron radiation, X-ray tomography |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10064226 |
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