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.

Mughal, M.Z., Moscatelli, R., Amanieu, H.Y., Sebastiani, M. (2016). Effect of lithiation on micro-scale fracture toughness of LixMn2O4 cathode. SCRIPTA MATERIALIA, 116, 62-66 [10.1016/j.scriptamat.2016.01.023].

Effect of lithiation on micro-scale fracture toughness of LixMn2O4 cathode

MUGHAL, MUHAMMAD ZEESHAN;MOSCATELLI, RICCARDO;SEBASTIANI, MARCO
2016-01-01

Abstract

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.
Mughal, M.Z., Moscatelli, R., Amanieu, H.Y., Sebastiani, M. (2016). Effect of lithiation on micro-scale fracture toughness of LixMn2O4 cathode. SCRIPTA MATERIALIA, 116, 62-66 [10.1016/j.scriptamat.2016.01.023].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/300033
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