Cathode Engineering Enables Robust Interface Contact for High-Performance All-Sulfide-Based Li-SeS<sub>2</sub> Solid-State Batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40854077.
- Also identified by DOI 10.1021/acsnano.5c10774.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
All-solid-state Li-sulfur batteries are promising candidates for next-generation energy storage systems, owing to their high energy density and capability to address the safety concerns and electrochemical stability challenges (e.g., the shuttle effect) inherent to liquid-based batteries. However, the electronic insulating nature and limited reactivity of sulfur result in sluggish kinetics, low utilization, and restricted cathode mass loading. Herein, SeS<sub>2</sub> is proposed as a cathode active material due to its enhanced electronic conductivity compared to sulfur. SeS<sub>2</sub> composite cathodes prepared with varying composite strategies exhibited significant differences in the electrochemical performance. Benefiting from enhanced interaction at the three-phase interface, the ball-milled SeS<sub>2</sub>/Li<sub>6</sub>PS<sub>5</sub>Cl/Ketjen Black composite cathode (SeS<sub>2</sub>-BM@KB)-based cells delivered a reversible capacity of 673.5 mAh g<sup>-1</sup> after 300 cycles at 1 A g<sup>-1</sup> at 30 °C with a capacity retention of 80%. Furthermore, high loading cells achieved high areal capacities of up to 14.43 mAh cm<sup>-2</sup>. This study highlights the potential of SeS<sub>2</sub> as an outstanding cathode material for developing high-energy-density all-solid-state batteries (ASSBs).