Bioinspired Vascular Bundle Structured Nanocellulose/PVDF-HFP Composite Membranes for Efficient Ion Transport and Stable All-Solid-State Lithium Batteries

Bioinspired bundle-sheath structure improves electrochemical and thermal stability; nanocellulose composite membranes can be used as high-performance all-solid-state lithium batteries separators. The FFP/ASSPE has a high ionic conductivity of 2.46 × 10 −4 S cm −1 at 30 °C. Li|FFP/ASSPE|LFP cells can maintain 77.48% capacity after 1000 cycles at 1 C, and Li|FFP/ASSPE|NCM811 cells maintain 83.94% capacity after 300 cycles of 0.1 C.