Suppressing High-Current-Induced Phase Separation in Ni-Rich Layered Oxides by Electrochemically Manipulating Dynamic Lithium Distribution.

Understanding the cycling rate-dependent kinetics is crucial for managing the performance of batteries in high-power applications. Although high cycling rates may induce reaction heterogeneity and affect battery lifetime and capacity utilization, such phase transformation dynamics are poorly understood and uncontrollable. In this study, synchrotron-based operando X-ray diffraction is performed to monitor the high-current-induced phase transformation kinetics of LiNi Co Mn O .

Data on the effect of particle size, porosity and discharging rate on the performance of lithium-ion battery with NMC 622 cathode through numerical analysis.

The data presented in this article are related to the computed results reported in the article entitled "A modeling approach to study the performance of Ni-rich layered oxide cathode for lithium-ion battery" [1]. The lithium-ion battery (LIB) employed in the simulation is made up of a LiNiMnCoO (NMC 622) cathode and lithium metal foil anode. The numerical simulations were carried out using COMSOL Multiphysics 5.

Modeling of Stresses and Strains during (De)Lithiation of NiSn-Coated Nickel Inverse-Opal Anodes.

Tin alloy-based anodes supported by inverse-opal nanoscaffolds undergo large volume changes from (de)lithiation during cyclic battery (dis)charging, affecting their mechanical stability. We perform continuum mechanics-based simulation to study the evolution of internal stresses and strains as a function of the geometry of the active layer(s): (i) thickness of NiSn single layer (30 and 60 nm) and (ii) stacking sequence of NiSn and amorphous Si in bilayers (60 nm thick). For single NiSn active layers, a thinner layer displays higher strains and stresses, which are relevant to mechanical stability, but causes lower strains and stresses in the Ni scaffold.

Analysis of transformation plasticity in steel using a finite element method coupled with a phase field model.

An implicit finite element model was developed to analyze the deformation behavior of low carbon steel during phase transformation. The finite element model was coupled hierarchically with a phase field model that could simulate the kinetics and micro-structural evolution during the austenite-to-ferrite transformation of low carbon steel. Thermo-elastic-plastic constitutive equations for each phase were adopted to confirm the transformation plasticity due to the weaker phase yielding that was proposed by Greenwood and Johnson.