Reversible Phase Transition in Ruddlesden-Popper-type Oxysulfide Y<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>S<sub>2</sub> for Lithium-Ion Battery Anodes (Supporting Information)
<div>Oxysulfides have the potential for battery electrodes to have durability and rate capability due to their rigid structures and electronic conductivity. Herein, we focus on the Ruddlesden-Popper phase oxysulfide Y<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>S&...
محفوظ في:
| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , , |
| منشور في: |
2025
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| الملخص: | <div>Oxysulfides have the potential for battery electrodes to have durability and rate capability due to their rigid structures and electronic conductivity. Herein, we focus on the Ruddlesden-Popper phase oxysulfide Y<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>S<sub>2</sub> and investigate the phase evolution of Y<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>S<sub>2</sub> during electrochemical Li<sup>+</sup> intercalation and deintercalation. The tetragonal structure is maintained down to 0.35 V during the lithiation process. A two-phase reaction between the tetragonal phase and the orthorhombic phase was observed at a voltage plateau region between 0.35 and 0.3 V. Subsequently, the tetragonal phase recovers for further lithiation process. The relatively low lattice volume change of 5 % compared with graphite anode leads to stable cycling performances.</div> |
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