About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Powder and Ceramic Materials Science
|
| Presentation Title |
CeO2-x Nanorods as Effective Cathode Host Materials in Li-S Batteries |
| Author(s) |
Zhen Wei, Sakibul Azam, Randeja Warren, Dariya Jones, Zephyr Barlow, Ruigang Wang |
| On-Site Speaker (Planned) |
Zhen Wei |
| Abstract Scope |
The emergence of Li-S batteries with favorable attributes such as low cost, non-toxicity and higher theoretical energy density (2567 Wh kg−1) triggers a global interest recently. The commercialization of Li-S batteries has been impeded by the polysulfides shuttling and sluggish redox kinetics. To address these technical issues, in this work, oxygen-deficient CeO2-x nanorods (NR) decorated on carbon cloth (CeO2-x NR@CC) were used as a dual-functional cathode host material to improve the electrochemical performance of Li-S batteries. The oxygen-deficient CeO2-x NR were prepared in a simple route by tuning the surface structures of pristine CeO2 NR in strong reducing NaBH4 solution. In contrast to the pristine CeO2NR@CC control sample, chemically etched CeO2-x NR@CC with abundant implanted oxygen vacancies demonstrated better immobilization of polysulfides and dramatically accelerated electron charge transfer, leading to faster redox kinetics in Li-S batteries. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Nanotechnology, Powder Materials |