Host-Guest Inversion Engineering Induced Superionic Composite Solid Electrolytes for High-Rate Solid-State Alkali Metal Batteries.

ABSTRACT: Composite solid electrolytes (CSEs) are promising for solid-state Li metal batteries but suffer from inferior room-temperature ionic conductivity due to sluggish ion transport and high cost due to expensive active ceramic fillers. Here, a host-guest inversion engineering strategy is proposed to develop superionic CSEs using cost-effective SiO₂ nanoparticles as passive ceramic hosts and poly(vinylidene fluoride-hexafluoropropylene) (PVH) microspheres as polymer guests, forming an unprecedented "polymer guest-in-ceramic host" (i.e., PVH-in-SiO₂) architecture differing from the traditional "ceramic guest-in-polymer host". The PVH-in-SiO₂ exhibits excellent Li-salt dissociation, achieving high-concentration free Li⁺. Owing to the low diffusion energy

SUBMITTER: Liu XX 

PROVIDER: S-EPMC11911308 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature