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 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.
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1 October 2010
Research Article|
October 08 2010
Fracture of electrodes in lithium-ion batteries caused by fast charging
Kejie Zhao;
Kejie Zhao
School of Engineering and Applied Sciences and Kavli Institute,
Harvard University
, Cambridge, Massachusetts 02138, USA
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Matt Pharr;
Matt Pharr
School of Engineering and Applied Sciences and Kavli Institute,
Harvard University
, Cambridge, Massachusetts 02138, USA
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Joost J. Vlassak;
Joost J. Vlassak
School of Engineering and Applied Sciences and Kavli Institute,
Harvard University
, Cambridge, Massachusetts 02138, USA
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Zhigang Suo
Zhigang Suo
a)
School of Engineering and Applied Sciences and Kavli Institute,
Harvard University
, Cambridge, Massachusetts 02138, USA
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a)
Electronic mail: [email protected].
J. Appl. Phys. 108, 073517 (2010)
Article history
Received:
August 04 2010
Accepted:
August 13 2010
Citation
Kejie Zhao, Matt Pharr, Joost J. Vlassak, Zhigang Suo; Fracture of electrodes in lithium-ion batteries caused by fast charging. J. Appl. Phys. 1 October 2010; 108 (7): 073517. https://doi.org/10.1063/1.3492617
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