Resources / Publications
Aly Badran(1), Thomas Clemenceau(2), Niriaina Andriamady(2), David Marshall(1), Rishi Raj(3)
Social Science Research Network, June 2020. DOI: 10.2139/ssrn.3610481
LLZO, lithium ion electrolytes, ceramic electrolyte, critical current density, dendrites
Low values of critical-current-densities are a significant shortcoming in the performance of Li6.25La3Zr2A10.25O12, a ceramic electrolyte. X-ray Computed Tomography (CT) images obtained from pristine and "exhausted" cells constructed with lithium metal electrodes, are used to map the spatial non-uniformity of lithium transport. The current is shown to be concentrated in a limited area of the interface, ostensibly producing low engineering values of the critical-current-density. The total volume of Li-ion transfer calculated from the CT scans, is consistent with Faradaic transport. A qualitative analysis of the maps suggests a current concentration factor of at least ten, and most likely even higher.
Dragonfly was used for image processing and segmentation.
(1) University of Colorado at Boulder - Department of Aerospace Engineering and Sciences.
(2) University of Colorado at Boulder - Department of Mechanical Engineering.
(3) University of Colorado at Boulder - Materials Science Program.
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