TY - JOUR
T1 - The coupling of strain and lithium diffusion
T2 - A theoretical model based on first-principles calculations
AU - Hao, Feng
AU - Fang, Daining
AU - Chen, Xi
N1 - Publisher Copyright:
© 2015 The Electrochemical Society.
PY - 2015
Y1 - 2015
N2 - Most electrodes undergo volume changes in lithium-ion batteries, and it turns out that the volume changes also significantly affect lithium diffusion kinetics based on first-principles calculations. To study the mechano-electro-chemical coupling, a theoretical model of spherical electrode has been developed and the effect of strain ondiffusion coefficient is explicitly considered. The results show that strain-enhanced diffusion greatly alleviates diffusion-induced stresses, and the lithiation and delithiation are extremely asymmetric in lithium concentration distribution and stresses due to asymmetrical changes of diffusion coefficient with time and positions along the radial direction.
AB - Most electrodes undergo volume changes in lithium-ion batteries, and it turns out that the volume changes also significantly affect lithium diffusion kinetics based on first-principles calculations. To study the mechano-electro-chemical coupling, a theoretical model of spherical electrode has been developed and the effect of strain ondiffusion coefficient is explicitly considered. The results show that strain-enhanced diffusion greatly alleviates diffusion-induced stresses, and the lithiation and delithiation are extremely asymmetric in lithium concentration distribution and stresses due to asymmetrical changes of diffusion coefficient with time and positions along the radial direction.
UR - http://www.scopus.com/inward/record.url?scp=84942684050&partnerID=8YFLogxK
U2 - 10.1149/2.0341512jes
DO - 10.1149/2.0341512jes
M3 - Article
AN - SCOPUS:84942684050
SN - 0013-4651
VL - 162
SP - A2266-A2270
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 12
ER -
