Modifiable Inorganic-Organic Nanofiber Templates for Possible Use in Advanced Battery Materials

This study focuses on developing modifiable inorganic–organic submicron and nanofibrous templates for solid-state battery applications. The goal is to fabricate composite structures combining polymer fibers with inorganic glassy components. Monodisperse boehmite (AlO(OH)) nanoparticles served as inorganic fillers, transforming into alumina and eventually forming mullite in the SiO 2 -Al 2 O 3 system after heat treatment. Electrospinning successfully produced homogeneous, compact layers with fiber diameters below 1 µm and high specific surface areas. Results demonstrate that calcination at 750°C removes the organic polymer matrix while retaining the fibrous morphology and layer compactness, yielding inorganic glassy fibers. Heating to higher temperatures causes further fiber thinning and triggers gradual mullite crystallization, confirmed after prolonged annealing at 1200°C. The prepared structures exhibit promising morphology and microstructure while resultant SiO 2 -Al 2 O 3 system is simultaneously thermally stable, which supports their potential use as modifiable inorganic platforms for the development of functional components in solid-state and thermal batteries.