Organotrisulfide: A High Capacity Cathode Material for Rechargeable Lithium Batteries |
| |
| Authors: | Min Wu Yi Cui Amruth Bhargav Yaroslav Losovyj Amanda Siegel Mangilal Agarwal Ying Ma Yongzhu Fu |
| |
| Affiliation: | 1. Department of Mechanical Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA;2. Department of Chemistry, Indiana University, Bloomington, IN, USA;3. Integrated Nanosystems Development Institute (INDI), Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA;4. Department of Chemistry and Chemical Biology, Indiana University-Purdue University Indianapolis, Indianapolis, IN, USA;5. Materials Science and Engineering Center, University of Wisconsin-Eau Claire, Eau Claire, WI, USA |
| |
| Abstract: | An organotrisulfide (RSSSR, R is an organic group) has three sulfur atoms which could be involved in multi‐electron reduction reactions; therefore it is a promising electrode material for batteries. Herein, we use dimethyl trisulfide (DMTS) as a model compound to study its redox reactions in rechargeable lithium batteries. With the aid of XRD, XPS, and GC‐MS analysis, we confirm DMTS could undergo almost a 4 e? reduction process in a complete discharge to 1.0 V. The discharge products are primarily LiSCH3 and Li2S. The lithium cell with DMTS catholyte delivers an initial specific capacity of 720 mAh g?1DMTS and retains 82 % of the capacity over 50 cycles at C/10 rate. When the electrolyte/DMTS ratio is 3:1 mL g?1, the reversible specific energy for the cell including electrolyte can be 229 Wh kg?1. This study shows organotrisulfide is a promising high‐capacity cathode material for high‐energy rechargeable lithium batteries. |
| |
| Keywords: | cathode materials dimethyl trisulfide organotrisulfides rechargeable lithium batteries redox reactions |
|
|
