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Organotrisulfide: A High Capacity Cathode Material for Rechargeable Lithium Batteries
Author(s) -
Wu Min,
Cui Yi,
Bhargav Amruth,
Losovyj Yaroslav,
Siegel Amanda,
Agarwal Mangilal,
Ma Ying,
Fu Yongzhu
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201603897
Subject(s) - lithium (medication) , electrolyte , cathode , redox , electrode , x ray photoelectron spectroscopy , chemistry , materials science , chemical engineering , inorganic chemistry , medicine , engineering , endocrinology
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 LiSCH 3 and Li 2 S. The lithium cell with DMTS catholyte delivers an initial specific capacity of 720 mAh g −1 DMTS 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.