Abstract
The morphological changes of a lithium powder electrode during cycling (discharge/charge) were observed at various current densities by scanning electron microscopy (SEM). The dissolution of the lithium powder electrode seemed to occur uniformly in the whole body of the electrode during discharge, and deposition occurred so as to sustain the initial powder shape during successive charging at a low current density. A model of the current density distribution and bonding number differences was developed, which rationalized the dissolution and deposition behaviors of the lithium ions. The suppression of dendritic growth in the lithium powder electrode was also understood from the standpoint of the Sand's time. The increased cycling life and small volume changes in the lithium powder electrode cell were able to be understood based on these behaviors.
| Original language | English |
|---|---|
| Pages (from-to) | 620-624 |
| Number of pages | 5 |
| Journal | Journal of Power Sources |
| Volume | 165 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2007 Mar 20 |
Bibliographical note
Funding Information:This work was supported by Korea Research Foundation Grant (KRF-2004-041-D00311).
Keywords
- Dissolution and deposition behavior
- Lithium metal secondary cell
- Lithium powder
- Morphological change
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering
