About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
Presentation Title |
Lithium-sulfur Batteries Featuring High Sulfur Loading and Low Electrolyte |
Author(s) |
Sheng-Heng Chung, Yun-Chung Ho |
On-Site Speaker (Planned) |
Yun-Chung Ho |
Abstract Scope |
As a promising post lithium-ion battery technology, lithium-sulfur battery cathodes suffer from the insulating sulfur and the irreversible polysulfide loss. These challenges restrict the development of a lithium-sulfur battery cathode with a sufficient sulfur loading and content of above 4.0 mg cm-2 and 65 wt.%, respectively, in a cell with a reasonable low electrolyte-to-sulfur ratio of less than 10.0 uL mg-1. Here, we present innovations on a carbon nanofiber electrode for enabling lithium-sulfur batteries to operate excellently with a high amount of sulfur (14.4 mg cm-2 and 70 wt.%) and a low electrolyte-to-sulfur ratio of 4.0 uL mg-1. The cells output a stable discharge capacity and Coulombic efficiency of above 650 mA h g-1 and 98%, respectively, for 100 cycles. In conclusion, the electrochemical enhancements and engineering designs of the cathode substrates make them advanced cathode designs for the development of high-loading/content sulfur cathodes in high-energy-density lithium-sulfur batteries. |
Proceedings Inclusion? |
Planned: |