Predictive Design of Shear-Thickening Electrolytes for Safety Considerations. Issue 12 (1st January 2017)

• Record Type: Journal Article
• Authors: Shen, Brian H.; Veith, Gabriel M.; Armstrong, Beth L.; Tenhaeff, Wyatt E.; Sacci, Robert L.
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 12(2017)
• Page Start: A2547
• Page End: A2551
• Publication Date: 2017-01-01
• Subjects: Li-ion batteries -- Multifunctional materials -- Shear-thickening electrolytes; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1171712jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Non-Newtonian, shear-thickening lithium-ion battery electrolytes show promise for improved safety in high impact events by exhibiting a reversible transition to a solid-like phase under high shear. This aids in the prevention of shorting and subsequent combustion of volatile electrolyte under such conditions. In this work, we investigate the electrodynamics of shear-thickening electrolytes using conductivity under shear measurements, as well as finite-element modeling. We observe an order of magnitude drop in ionic conductivity under shear-thickening conditions. We suggest a working model to explain substantial drops in conductivity observed in shear-thickening electrolytes under shear. The results here can be generally applied to any electrolyte that exhibits non-Newtonian hydrodynamic properties.