期刊
JOURNAL OF MATERIALS RESEARCH
卷 36, 期 4, 页码 787-796出版社
SPRINGER HEIDELBERG
DOI: 10.1557/s43578-020-00098-x
关键词
Li; Fracture; Nanoindentation; Energy storage; Thin films
资金
- U.S. Department of Energy, Advanced Research Projects Agency for Energy (ARPA-E) through the IONICS program [DE-AR0000775, DE-AC05-00OR22725]
- U.S. Department of Energy Vehicle Technologies Office (VTO) Advanced Battery Materials Research Program
This study investigated the resistance to cracking of solid Li-ion conductor Lipon through nanoindentation, revealing surprising ductility and recoverability in Lipon. In comparison to other inorganic solid electrolyte materials, Lipon accommodates stress via pile-up and densification rather than cracking.
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
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