| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2014) | |
| Energy Harvesting & Storage | Tuesday Sessions |
| Session EH-TuP |
| Session: | Energy Harvesting & Storage Poster Session |
| Presenter: | DaeHo Yoon, Kyonggi University, Republic of Korea |
| Authors: | D.H. Yoon, Kyonggi University, Republic of Korea Y.J. Park, Kyonggi University, Republic of Korea |
| Correspondent: | Click to Email |
In this study, we characterized the cyclic performance of an air electrode employing a carbon nanotube (CNT)/Co3O4 nanocomposite. The lithium anode and electrolyte were replaced every 50 cycles in order to exclude the effect of a corrupted anode and electrolyte and to determine the “real” cyclic performance of the electrode. The overpotential of the cells increased during the first 50 cycles; however, it almost vanished when the lithium anode and electrolyte were replaced. This result indicates that the increased overpotential of the cells during cycling is highly attributed to the corrupted lithium anode and electrolyte [1, 2]. The cycle life of the cell also significantly increased upon replacement of the lithium anode and electrolyte. This confirms that air electrodes have the ability to maintain their designated capacity (such as 1000 mAh·gelectrode−1) for much longer cycles if the lithium anode and electrolyte can be made more stable. A polydopamine-coated electrode and a LiI-containing electrolyte were introduced and characterized in order to obtain enhanced cyclic performance of the air electrode.
References
[1] P. G. Bruce, M. M. Ottakam Thotiyl, J. Am. Chem. Soc. 135(2013) 494-500
[2] Jun Lu, Yu Lei, Nature Communications DOI:10.1038/ncomms3383