Evolution of stress within a spherical insertion electrode particle under potentiostatic and galvanostatic operation

Cheng, Yang‐Tse; Verbrugge, Mark W.

doi:10.1016/j.jpowsour.2009.01.021

Cited by 410 publications

(337 citation statements)

References 27 publications

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“…The shear stresses along xz and xy directions are in a very 15 small magnitude compared with the hydrostatic stress. With the time increase, both the hydrostatic stress and shear stress along yz direction increase monotonically, which is in agreement with Ref [26]. Additionally, the magnitude of the hydrostatic stress is three times larger than the shear stress along yz direction.…”

Section: 24supporting

confidence: 91%

Three-dimensional phase field based finite element study on Li intercalation-induced stress in polycrystalline LiCoO2

Zhang

Jung

et al. 2015

Journal of Power Sources

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In this study, the stress generation of LiCoO2 with realistic 3D microstructures has been studied systematically. Phase field method was employed to generate the 3D microstructures with different grain sizes. The effects of grain size, grain crystallographic orientation, and grain boundary diffusivity on chemical diffusion coefficient and stress generation were studied using finite element method. The calculated chemical diffusion coefficient is about in the range of 8.5×10 -10 cm 2 /s to 3.6×10 -9 cm 2 /s. Stresses increase with the increase of grain size, due to more accumulation of Li ion near the grain boundary regions in larger grain size systems, which causes a larger concentration gradient. Failure is more likely to occur in large grain systems. The chemical diffusion coefficients increase with increasing grain orientation angle irrespective of grain boundary diffusivity, due to alignment of global Li ion diffusion path with high grain orientations. Grain boundary diffusivity has opposite effect on the hydrostatic stress. As small grain boundary diffusivity, the stress increases with increasing grain orientation angle, due to

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Section: 24supporting

confidence: 91%

Three-dimensional phase field based finite element study on Li intercalation-induced stress in polycrystalline LiCoO2

Zhang

Jung

et al. 2015

Journal of Power Sources

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“…Li 13 studied DISs generated in solid ferrite doped with excess nitrogen in different simple shapes such as thin plates, cylinders and spheres. Recently Yang et al 14 analyzed the stresses caused by insertion deformation within a spherical electrode particle in potentiostatic and galvanostatic conditions. Song et al 15 and Li et al 16 computed the analytical expressions of DISs in cylindrical electrode, while Zhang et al 17 introduced Young's modulus ratio and axial lithiation expansion coefficient ratio to isotropic case to investigate stresses generated in transversely isotropic cylindrical electrodes of lithium-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Stress analysis in cylindrical composition-gradient electrodes of lithium-ion battery

2017

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In recent years, the composition-gradient electrode material has been verified to be one of the most promising materials in lithium-ion battery. To investigate diffusion-induced stresses (DIS) generated in a cylindrical composition-gradient electrode, the finite deformation theory and the stress-induced diffusion hypothesis are adopted to establish the constitutive equations. Compared with stress distributions in a homogeneous electrode, the increasing forms of Young’s modulus E(R) and partial molar volume Ω(R) from the electrode center to the surface along the radial direction drastically increase the maximal magnitudes of hoop and axial stresses, while both of the decreasing forms are able to make the stress fields smaller and flatter. Also, it is found that the slope of -1 for E(R) with that of -0.5 for Ω(R) is a preferable strategy to prevent the inhomogeneous electrode from cracking, while for the sake of protecting the electrode from compression failure, the optimal slope for inhomogeneous E(R) and the preferential one for Ω(R) are both -0.5. The results provide a theoretical guidance for the design of composition-gradient electrode materials.

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“…Most continuum-level models of chemomechanical coupling have been developed to estimate diffusion-induced stresses-analogous to thermal stresses-which develop in the presence of a concentration gradient. A variety of single-particle models have been developed to estimate diffusion-induced stresses for battery electrode materials subjected to common electrochemical protocols [95][96][97] and incorporating a variety of effects including limited solid-solubility [98-100], particle shape [101,102], composition-dependent elastic modulus [103], and internal porosity [104]. Other particlelevel models have been developed which apply fracture mechanics failure criteria to study mechanical degradation of electrode materials, but these models considered static configurations-essentially the limit of zero rate-to identify critical length scales using fracture mechanics failure criteria.…”

Section: Continuum Modelingmentioning

confidence: 99%

Chemomechanics of ionically conductive ceramics for electrical energy conversion and storage

et al. 2014

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Functional materials for energy conversion and storage exhibit strong coupling between electrochemistry and mechanics. For example, ceramics developed as electrodes for both solid oxide fuel cells and batteries exhibit cyclic volumetric expansion upon reversible ion transport. Such chemomechanical coupling is typically far from thermodynamic equilibrium, and thus is challenging to quantify experimentally and computationally. In situ measurements and atomistic simulations are under rapid development to explore how this coupling can be used to potentially improve both device performance and durability. Here, we review the commonalities of coupling between electrochemical and mechanical states in fuel cell and battery materials, illustrating with specific cases the progress in materials processing, in situ characterization, and computational modeling and simulation. We also highlight outstanding questions and opportunities in these applications -both to better understand the limiting mechanisms within the materials and to significantly advance the durability and predictability of device performance required for renewable energy conversion and storage.

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Evolution of stress within a spherical insertion electrode particle under potentiostatic and galvanostatic operation

Cited by 410 publications

References 27 publications

Three-dimensional phase field based finite element study on Li intercalation-induced stress in polycrystalline LiCoO2

Three-dimensional phase field based finite element study on Li intercalation-induced stress in polycrystalline LiCoO2

Stress analysis in cylindrical composition-gradient electrodes of lithium-ion battery

Chemomechanics of ionically conductive ceramics for electrical energy conversion and storage

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