About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Tailoring the Sulfur Electrode for Enhanced Kinetics and Longevity of Li-S Batteries |
| Author(s) |
Yuxuan Zhang, Han Wook Song, Sunghwan Lee |
| On-Site Speaker (Planned) |
Yuxuan Zhang |
| Abstract Scope |
Polysulfides shuttling between electrodes is the main bottleneck hindering the practical utilization of Li-S batteries. Herein, we propose a commendable mitigation strategy that limits the polysulfides in the cathode by leveraging the oxidative chemical vapor deposition (oCVD) technique. oCVD poly (3, 4-ethylenedioxythiophene) (o-PEDOT) is conformally coated on the sulfur particles to multifunctionally furnish a highly conductive network and inhibit the shuttling of polysulfides during battery operation. Moreover, the layer-network structure of the o-PEDOT is capable of endowing the adhesion and cohesion strength to the cathode, resulting in active materials up to 90 wt.%. Further study reveals the o-PEDOT can facilitate kinetic conditions of the sulfur conversion and confine polysulfides within the cathode regime. Consequently, the sulfur cathode demonstrates a capacity retention of 85% after 300 cycles. The pouch cell showcases a high specific energy up to 202Wh/kg with a low electrolyte/sulfur ratio of 4.55, convincing the potential for practical applications. |