Realizing long-cycling all-solid-state Li-In||TiS<sub>2</sub> batteries using Li<sub>6+x</sub>M<sub>x</sub>As<sub>1-x</sub>S<sub>5</sub>I (M=Si, Sn) sulfide solid electrolytes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37429864.
- Also identified by DOI 10.1038/s41467-023-39686-w and PMC identifier 10333182.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Inorganic sulfide solid-state electrolytes, especially Li<sub>6</sub>PS<sub>5</sub>X (X = Cl, Br, I), are considered viable materials for developing all-solid-state batteries because of their high ionic conductivity and low cost. However, this class of solid-state electrolytes suffers from structural and chemical instability in humid air environments and a lack of compatibility with layered oxide positive electrode active materials. To circumvent these issues, here, we propose Li<sub>6+x</sub>M<sub>x</sub>As<sub>1-x</sub>S<sub>5</sub>I (M=Si, Sn) as sulfide solid electrolytes. When the Li<sub>6+x</sub>Si<sub>x</sub>As<sub>1-x</sub>S<sub>5</sub>I (x = 0.8) is tested in combination with a Li-In negative electrode and Ti<sub>2</sub>S-based positive electrode at 30 °C and 30 MPa, the Li-ion lab-scale Swagelok cells demonstrate long cycle life of almost 62500 cycles at 2.44 mA cm<sup>-2</sup>, decent power performance (up to 24.45 mA cm<sup>-2</sup>) and areal capacity of 9.26 mAh cm<sup>-2</sup> at 0.53 mA cm<sup>-2</sup>.