1. Lithium-Rich Rock Salt Type Sulfides-Selenides (Li 2 TiSe x S 3−x): High Energy Cathode Materials for Lithium-Ion Batteries.
- Author
-
Celasun, Yagmur, Colin, Jean-François, Martinet, Sébastien, Benayad, Anass, and Peralta, David
- Subjects
LITHIUM-ion batteries ,ROCK salt ,ELECTROCHEMICAL electrodes ,CATHODES ,LATTICE constants ,MECHANICAL chemistry ,LITHIUM - Abstract
Lithium-rich disordered rocksalt Li
2 TiS3 offers large discharge capacities (>350 mAh·g−1 ) and can be considered a promising cathode material for high-energy lithium-ion battery applications. However, the quick fading of the specific capacity results in a poor cycle life of the system, especially when liquid electrolyte-based batteries are used. Our efforts to solve the cycling stability problem resulted in the discovery of new high-energy selenium-substituted materials (Li2 TiSex S3−x ), which were prepared using a wet mechanochemistry process. X-ray diffraction analysis confirmed that all compositions were obtained in cation-disordered rocksalt phase and that the lattice parameters were expanded by selenium substitution. Substituted materials delivered large reversible capacities, with smaller average potentials, and their cycling stability was superior compared to Li2 TiS3 upon cycling at a rate of C/10 between 3.0–1.6 V vs. Li+ /Li. [ABSTRACT FROM AUTHOR]- Published
- 2022
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