Sodium mechanics: effects of temperature, strain rate, and grain rotation and implications for sodium metal batteries

Abstract

Sodium-metal batteries are an attractive energy storage technology, owing to the low cost and relative earth abundance of sodium. However, despite the importance of electro-chemo-mechanical phenomena in alkali-metal batteries, experiments on the mechanical properties of metallic Na are relatively scarce, especially in terms of its viscoplastic response. In this work, we measured the temperature- and rate-dependent deformation of sodium by performing tensile tests in inert gas environments. Digital image correlation measurements were performed to track the local strain and rotation fields. Temperature-dependent experiments were used to experimentally calibrate the activation energy for creep. Furthermore, local deformation measurements of sodium suggest that grain-size and crystallographic orientation effects may be important considerations for sodium-based batteries. Finally, the implications of creep on the performance of Na-metal batteries discussed, providing guidance for future modeling efforts.

BibTeX

@article{2022_lepage_sodium_mechanics,
  title     = {Sodium mechanics: effects of temperature, strain rate, and grain rotation and implications for sodium metal batteries},
  author    = {LePage W and Chen Y and Poli A and Thouless MD and Dasgupta NP},
  journal   = {Extreme Mechanics Letters},
  volume    = {52},
  pages     = {101644},
  year      = {2022},
  doi       = {10.1016/j.eml.2022.101644},
}

Vancouver

LePage W, Chen Y, Poli A, Thouless MD, Dasgupta NP. Sodium mechanics: effects of temperature, strain rate, and grain rotation and implications for sodium metal batteries. Extreme Mechanics Letters. 2022;52:101644. doi:10.1016/j.eml.2022.101644

Version and rights

The file posted here is the accepted manuscript — the peer-reviewed text, before the publisher's copyediting and typesetting. Its content matches the version of record; its appearance does not. Please cite the version of record at the DOI above.

This is the accepted manuscript of an article published by Elsevier. The Version of Record is available at https://doi.org/10.1016/j.eml.2022.101644.

This manuscript version is made available under the CC-BY-NC-ND 4.0 license (https://creativecommons.org/licenses/by-nc-nd/4.0/).