A chemo-mechanical model of lithiation in silicon

Yang, Hui; Fan, Fenliang; Liang, Wentao; Gao, Xu; Zhu, Ting; Zhang, Sulin

doi:10.1016/j.jmps.2014.06.004

Cited by 196 publications

(182 citation statements)

References 59 publications

Supporting

Mentioning

169

Contrasting

Unclassified

Order By: Relevance

“…An alternative approach is to still adopt the classical Fick's first law, j = −D∇c, but embedding the stress effect by empirically assuming Li diffusivity as a function of both Li concentration and the stress state, 12,66,67 i.e., D = D(c; σ). The effective diffusivity can be expressed by D ¼ D 0 expðÀpΩ=k B TÞ, where D 0 is the diffusivity at the stress-free condition, p is the hydrostatic pressure, Ω is the activation volume and k B T is the thermal energy.…”

Section: Governing Equationsmentioning

confidence: 99%

“…The unlithiated domain is modeled as an isotropic, elastic material, whose stress and strain rates obey the classical Hooke's law with two material constants, Young's modulus Y and Poisson's ratio ν. The lithiated phase is modeled by an isotropic elastic, perfectly, 65 or rate-dependent plastic material, 67,70,[73][74][75][76][77] with phase-dependent elastic constants. Note that the ratedependent plasticity introduces an additional time scale characterizing the stress relaxation, and thus may affect stress generation.…”

Section: Governing Equationsmentioning

confidence: 99%

See 1 more Smart Citation

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

Zhang

2017

npj Comput Mater

Self Cite

101

View full text Add to dashboard Cite

The rapidly increasing demand for efficient energy storage systems in the last two decades has stimulated enormous efforts to the development of high-capacity, high-power, durable lithium ion batteries. Inherent to the high-capacity electrode materials is material degradation and failure due to the large volumetric changes during the electrochemical cycling, causing fast capacity decay and low cycle life. This review surveys recent progress in continuum-level computational modeling of the degradation mechanisms of high-capacity anode materials for lithium-ion batteries. Using silicon (Si) as an example, we highlight the strong coupling between electrochemical kinetics and mechanical stress in the degradation process. We show that the coupling phenomena can be tailored through a set of materials design strategies, including surface coating and porosity, presenting effective methods to mitigate the degradation. Validated by the experimental data, the modeling results lay down a foundation for engineering, diagnosis, and optimization of high-performance lithium ion batteries.

show abstract

Section: Governing Equationsmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

Zhang

2017

npj Comput Mater

Self Cite

101

View full text Add to dashboard Cite

show abstract

“…For instance, using the CowperSymonds overstress power law to approximate the perfectly plastic limit in Ref. 24, Yang et al…”

Section: Modelmentioning

confidence: 99%

“…The concurrent processes of Li transport, phase transformation and elasto-plastic deformation in Si anodes have inspired numerous modeling works [19][20][21][22][23][24][25] . Several groups developed models to explain the anisometric volume expansion of c-Si nanowires upon lithiation 14,18,24 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mitigating mechanical failure of crystalline silicon electrodes for lithium batteries by morphological design

Wood

et al. 2015

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

Although crystalline silicon (c-Si) anodes promise very high energy densities in Li-ion batteries, their practical use is complicated by amorphization, large volume expansion and severe plastic deformation upon lithium insertion. Recent experiments have revealed the existence of a sharp interface between crystalline Si (c-Si) and the amorphous Li x Si alloy during lithiation, which propagates with a velocity that is orientation dependent; the resulting anisotropic swelling generates substantial strain concentrations that initiate cracks even in nanostructured Si. Here we describe a novel strategy to mitigate lithiation-induced fracture by using pristine c-Si structures with engineered anisometric morphologies that are deliberately designed to counteract the anisotropy in the crystalline/amorphous interface velocity. This produces a much more uniform

show abstract

Kirigami‐Inspired Self‐Assembly of 3D Structures

Abdullah

Rogers

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Self‐assembly of 3D structures presents an attractive and scalable route to realize reconfigurable and functionally capable mesoscale devices without human intervention. A common approach for achieving this is to utilize stimuli‐responsive folding of hinged structures, which requires the integration of different materials and/or geometric arrangements along the hinges. It is demonstrated that the inclusion of Kirigami cuts in planar, hingeless bilayer thin sheets can be used to produce complex 3D shapes in an on‐demand manner. Nonlinear finite element models are developed to elucidate the mechanics of shape morphing in bilayer thin sheets and verify the predictions through swelling experiments of planar, millimeter‐scaled PDMS (polydimethylsiloxane) bilayers in organic solvents. Building upon the mechanistic understandings, The transformation of Kirigami‐cut simple bilayers into 3D shapes such as letters from the Roman alphabet (to make “ADVANCED FUNCTIONAL MATERIALS”) and open/closed polyhedral architectures is experimentally demonstrated. A possible application of the bilayers as tether‐less optical metamaterials with dynamically tunable light transmission and reflection behaviors is also shown. As the proposed mechanistic design principles could be applied to a variety of materials, this research broadly contributes toward the development of smart, tetherless, and reconfigurable multifunctional systems.

show abstract

A chemo-mechanical model of lithiation in silicon

Cited by 196 publications

References 59 publications

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries

Mitigating mechanical failure of crystalline silicon electrodes for lithium batteries by morphological design

Kirigami‐Inspired Self‐Assembly of 3D Structures

Contact Info

Product

Resources

About