Fracture of electrodes in lithium-ion batteries caused by fast charging Academic Article

abstract

• During charging or discharging of a lithium-ion battery, lithium is extracted from one electrode and inserted into the other. This extraction-insertion reaction causes the electrodes to deform. An electrode is often composed of small active particles in a matrix. If the battery is charged at a rate faster than lithium can homogenize in an active particle by diffusion, the inhomogeneous distribution of lithium results in stresses that may cause the particle to fracture. The distributions of lithium and stress in a LiCoO2 particle are calculated. The energy release rates are then calculated for the particle containing preexisting cracks. These calculations predict the critical rate of charging and size of the particle, below which fracture is averted.

authors

• Pharr, Matt

published proceedings

• JOURNAL OF APPLIED PHYSICS

author list (cited authors)

• Zhao, K., Pharr, M., Vlassak, J. J., & Suo, Z.

citation count

• 353

complete list of authors

• Zhao, Kejie||Pharr, Matt||Vlassak, Joost J||Suo, Zhigang

publication date

• October 2010

publisher

• AIP Publishing  Publisher

published in

• Journal of Applied Physics  Journal

keywords

• 40 Engineering
• 4016 Materials Engineering
• 7 Affordable And Clean Energy

Digital Object Identifier (DOI)

• 10.1063/1.3492617

start page

• 073517

volume

• 108

issue

• 7

URL

• http://dx.doi.org/10.1063/1.3492617

user-defined tag

• 7 Affordable and Clean Energy