Abstract
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. © 2015 The Electrochemical Society.
| Original language | English |
|---|---|
| Pages (from-to) | A2266-A2270 |
| Number of pages | 5 |
| Journal | Journal of the Electrochemical Society |
| Volume | 162 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 31 Aug 2015 |
| Externally published | Yes |
Funding
We acknowledge the support from the National Natural Science Foundation of China (11172231 and 11372241), ARPA-E (DE-AR0000396) and AFOSR (FA9550-12-1-0159).
