About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
Presentation Title |
Metal-sulfur Nanocomposite for Developing High-loading Electrochemical Cathode |
Author(s) |
Sheng-Heng Chung, Cun-Sheng Cheng |
On-Site Speaker (Planned) |
Cun-Sheng Cheng |
Abstract Scope |
High-performance sulfur cathodes with a high amount of active material and stable electrochemical properties at a lean electrolyte hold the key to realize high-energy-density lithium-sulfur batteries as the promising beyond-lithium-ion technology. However, the development of practically-available sulfur cathodes has not yet obtained a significant breakthrough. We present here a metal-sulfur nanocomposite possessing a conductive metal shell coated on sulfur particles to improve the cathode conductivity and polysulfide retention. The metal-sulfur nanocomposite cathode exhibits high electrochemical utilization and kinetics with high charge-storage capacity of 1,008 mA∙h g-1 and excellent rate performance from C/20 to C/2 rates with stable cyclability for 200 cycles. These improved cathode performances are realized by the high-loading cathode with a high sulfur loading of 14 mg cm-2 and a high sulfur content of 74 wt% in a lean electrolyte condition with an electrolyte-to-sulfur ratio of 7 µL mg-1. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Nanotechnology, Additive Manufacturing |