Surface effected fracture behavior of nano-spherical electrodes during lithiation reaction

Hu, X.P.; Zhao, Yang; Cai, Rui; Zhou, Jianqiu

doi:10.1016/j.msea.2017.09.033

Cited by 17 publications

(7 citation statements)

References 46 publications

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“…It is also observed that hydrostatic stress concentrates at the vicinity of the initial crack tips, then it reduces by time which makes the crack more stable. The above outcomes are in agreement with the previous studies in [11,26,10,14,15]. In addition, by the arrival of concentration front to the vicinity of the crack tips, the concentration distribution in electrode becomes nonuniform and a very high accumulation of c is observed at the tips.…”

Section: Effect Of Initial Crack Lengthsupporting

confidence: 92%

“…Chen et al [10] established an analytical model to study the stress evolution and crack propagations in spherical particle electrodes during phase transformation. Hu et al [11] developed an analytical model to study the diffusion induced stress evolution and discussed the crack growth by using stress intensity factor coupled with surface effects. They showed that smaller Si Spherical particles exhibit higher structural integrity.…”

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confidence: 99%

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A Hybrid Phase Field Model for Fracture Induced by Lithium Diffusion in Electrode Particles of Li-ion Batteries

Ahmadi

2020

Preprint

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Section: Effect Of Initial Crack Lengthsupporting

confidence: 92%

mentioning

confidence: 99%

A Hybrid Phase Field Model for Fracture Induced by Lithium Diffusion in Electrode Particles of Li-ion Batteries

Ahmadi

2020

Preprint

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“…process. Because the process of elastic deformation is much faster than atomic diffusion, the mechanical equilibrium during lithiation and delithiation is considered as a static equilibrium model [19,21,28,60]. Due to the symmetry of nanofilm electrode in Fig.…”

Section: 4 4 4 4 Temperature Temperature Temperature Temperamentioning

confidence: 99%

A systematic investigation of cycle number, temperature and electric field strength effects on Si anode

Fang

Wang

et al. 2018

Materials & Design

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Cycling number, crystal orientation, temperature and electric field strength play key roles in affecting the capacity and cycling ability of Li-ion battery. However, the detailed dynamic and continuous process of capacity decline mechanism from above factors need to be further understood at nanoscale. Herein, we report deformation behavior and microstructure evolution of Si anode under electric field using molecular dynamics simulations. The results show larger cycling number and electric field strength cause larger volume expansion of Si electrode, leading to the capacity loss and the reducing cycling ability as well as the decreasing structural stability. The phase transformation from diamond cubic structure to body-centred tetragonal structure and the amorphous formation depend on lithiated and delithiated depths. The crystal orientation [100] Si anode produces the volume expansion owing to a large number of nanoscale void. The various temperatures strongly affect the number and radius of nanovoid. The associated transition in the nanovoid nucleation due to the involuntary diffusion process is driven by larger cycling number or electric field strength, resulting in the irreversible capacity loss of Li-ion battery. An established analytical model suggests that diffusion-induced stress not only relies on the position of Si anode but depends upon the cycling time.

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“…By using discrete element method associating with the cohesive crack model, Sun et al [19] investigated the crack initiation and propagation behaviour at interfaces between the primary particles in secondary cathode particle. Hu et al [20] employed the stress intensity factor coupled with surface effect to study the crack growth in nano-spherical electrodes. Li and co-workers [21] applied the spring-block model to investigate the cracking behaviour of silicon thin film electrode, and obtained a critical thickness for avoiding crack of silicon film.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the cyclic mechanical damage of Li-ion battery electrode and experimental validation

Zhu

Xie

Chen

et al. 2021

International Journal of Fatigue

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Evidences have accumulated that the cyclic diffusion-induced stress within lithiation-delithiation process will result in the cyclically evolutive mechanical damage of battery electrode, which adversely affects the mechanical integrity as well as the performance of the Li-ion battery. In this work, the mechanical degradation of electrode under electrochemical-mechanical condition is innovatively evaluated as a fatigue damage process, governed by the interaction between diffusion behaviour and stress generation, and accumulated fatigue damage affected stress-strain response. Structural configuration of a layered electrode plate is modeled in finite element software ABAQUS and a set of user subroutines are developed to implement the proposed fatigue evaluation approach for battery electrode. The constructed approach is proved to be able to simulate multifarious categories of fatigue damage accumulation trends of battery electrode. The strategy to correlate the electrochemistry represented damage with mechanical fatigue damage are proposed. Experimental performance tests are conducted to parameterize the fatigue damage model within the assessment approach for electrode material LiNi0.5Mn0.3Co0.2O2 (NMC532). After parameterization, further circulating chargingdischarging experiments and fatigue damage simulations with respect to different C-rate conditions are carried out to study the applicability of the proposed evaluation model as well as the assumption between electrochemical and mechanical deterioration. It is observed that the electrode surface adhering to electrolyte is more prone to fracture in the cycling operation. The present research work shows that it is available to apply the fatigue damage method to study the gradually mechanical failure of battery electrode under electrochemical-mechanical condition.

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Surface effected fracture behavior of nano-spherical electrodes during lithiation reaction

Cited by 17 publications

References 46 publications

A Hybrid Phase Field Model for Fracture Induced by Lithium Diffusion in Electrode Particles of Li-ion Batteries

A Hybrid Phase Field Model for Fracture Induced by Lithium Diffusion in Electrode Particles of Li-ion Batteries

A systematic investigation of cycle number, temperature and electric field strength effects on Si anode

Numerical analysis of the cyclic mechanical damage of Li-ion battery electrode and experimental validation

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