An optimized nanoindentation pillar splitting technique is used for the fracture toughness measurement of spinel LixMn2O4 cathode material under different states of charge (SoC), along with the high-speed nanoindentation results for nanomechanical property mapping. High-speed nanoindentation enables for a robust and efficient evaluation of elastic modulus and hardness as a function of the SoC on strongly heterogeneous materials. The fracture toughness decreases linearly upon de-lithiation, with an overall reduction of 53% from 0% to 100% SoC. Decrease in fracture toughness is associated with the volume change, increase of defect density and stresses related to diffusion of lithium upon de-lithiation.
|Titolo:||Effect of lithiation on micro-scale fracture toughness of LixMn2O4 cathode|
|Data di pubblicazione:||2016|
|Citazione:||Mughal, M.Z., Moscatelli, R., Amanieu, H., & Sebastiani, M. (2016). Effect of lithiation on micro-scale fracture toughness of LixMn2O4 cathode. SCRIPTA MATERIALIA, 116, 62-66.|
|Appare nelle tipologie:||1.1 Articolo in rivista|