Targeting the Right Metrics for an Efficient Solvent-Free Formulation of PEO:LiTFSI:LiPSCl Hybrid Solid Electrolyte.

Hybrid solid electrolytes (HSEs) aim to combine the superior ionic conductivity of inorganic fillers with the scalable process of polymer electrolytes in a unique material for solid-state batteries. Pursuing the goal of optimizing the key metrics (σ ≥ 10 S·cm at 25 °C and self-standing property), we successfully developed an HSE based on a modified poly(ethylene oxide):LiTFSI organic matrix, which binds together a high loading (75 wt %) of LiPSCl particles, following a solvent-free route. A rational study of available formulation parameters has enabled us to understand the role of each component in conductivity, mixing, and mechanical cohesion.

Decoupling Parasitic Reactions at the Positive Electrode Interfaces in Argyrodite-Based Systems.

Li-ion batteries are the key stones of electric vehicles, but with the emergence of solid-state Li batteries for improving autonomy and fast charging, the need for mastering the solid electrolyte (SE)/electrode material interfaces is crucial. All-solid-state-batteries (ASSBs) suffer from long-term capacity fading with enhanced decomposition reactions. So far, these reactions have not been extensively studied in LiPSCl-based systems because of the complexity of overlapping degradation mechanisms.