Viscoplastic response of electrode particles in Li-ion batteries driven by insertion of lithium

被引：36

作者：

Drozdov, A. D. ^{[1
]}

机构：

[1] Danish Technol Inst, Dept Plast Technol, DK-2630 Taastrup, Denmark

来源：

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES | 2014年 / 51卷 / 3-4期

关键词：

Lithium ion battery; Stress-induced diffusion; Viscoplasticity; Trapping concept; Constitutive modeling; IN-SITU TEM; DIFFUSION-INDUCED STRESSES; SIZE-DEPENDENT FRACTURE; CRYSTALLINE SILICON; ELECTROCHEMICAL LITHIATION; INITIAL LITHIATION; COUPLED DIFFUSION; SPECIES DIFFUSION; AMORPHOUS-SILICON; PHASE-SEPARATION;

D O I：

10.1016/j.ijsolstr.2013.10.033

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Constitutive equations are derived for the viscoplastic behavior of a host medium driven by diffusion of guest atoms. With reference to the trapping concept, two states of a guest atom are distinguished: mobile and immobilized (due to alloying with the host matrix). This allows propagation of a sharp interphase to be described between regions rich and poor in guest atoms. The model is applied to study the mechanical response of a spherical electrode particle in a Li-ion battery. Ability of the constitutive equations to capture basic phenomena observed in anode particles under lithiation is demonstrated by numerical simulation. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：690 / 705

页数：16

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