Abstract
Abstract: We report on the mechanical behavior of a solid Li-ion conductor, lithium phosphorous oxynitride (Lipon), for solid-state batteries. In particular, the purpose of this investigation was to quantify the resistance to cracking (fracture toughness) of this material by nanoindentation. We observed surprising ductility and the ability to recover in Lipon. We were unsuccessful in inducing cracks in Lipon and observed accommodation of stress via pile-up and densification rather than by cracking at various strain rates. Simulations demonstrate that both deformation and densification depend on the alkali content. Densification appears to be recoverable at room temperature. We discuss the findings in comparison with nanoindentation-induced cracking in other inorganic solid electrolyte materials and provide possible explanations for high resistance of Lipon to Li filament propagation. Graphic abstract: [Figure not available: see fulltext.]
| Original language | English |
|---|---|
| Pages (from-to) | 787-796 |
| Number of pages | 10 |
| Journal | Journal of Materials Research |
| Volume | 36 |
| Issue number | 4 |
| DOIs | |
| State | Published - Mar 2021 |
Funding
This research at Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725, was sponsored by the U.S. Department of Energy, Advanced Research Projects Agency for Energy (ARPA-E) through the IONICS program led by Paul Albertus, Award No. DE-AR0000775 and completed with support by the U.S. Department of Energy Vehicle Technologies Office (VTO) Advanced Battery Materials Research Program (Tien Duong, Program Manager). Alexis Flores-Betancourt and Takaaki Koyanagi are acknowledged for their expertise in setting up the equipment.
Keywords
- Energy storage
- Fracture
- Li
- Nanoindentation
- Thin films
