Multiband Spectrum Method for Quantifying the Ionic Contribution of Volume Strategy and Filler Strategy: Enhancing the Ionic Transport Channels for Polymeric Solid-State Batteries.

As a promising solution for solid-state batteries with high energy density and safety, understanding the mechanism of fast ion conduction in polymer-ceramic composite solid-state electrolytes (CSEs) is still a challenging task. Herein, we understand the enhanced ion conduction in CSEs using a series of ionic spectra. Ionic insight is extended to ion conduction in CSEs, resolving the mechanism of fast ion migration.