Thin Fiber-Based Separators for High-Rate Sodium Ion Batteries

Published on 2019-11-08T20:03:49Z (GMT) by
A thermally resistant, high-performance electrospun hybrid PVDF-HFP/SiO<sub>2</sub> fiber-based separator (EHS) has been successfully fabricated and its performance for sodium ion batteries explored. The EHS, containing 40% of its weight as SiO<sub>2</sub>, is made of intermingled nonwoven hybrid organic (PVDF-HFP) inorganic (SiO<sub>2</sub>) fibers (∼145 nm) to produce a highly porous network (∼85% in volume). This EHS separator shows an important electrolyte uptake with nearly no swelling, and an interface stability comparable to today’s commercialized Al<sub>2</sub>O<sub>3</sub>-coated PP and cellulose separators. Full NVPF//NaPF<sub>6</sub>-EC:PC//hard carbon cells using EHS show low ionic resistance, excellent rate capability, cycling retention, and longer short-circuit time.

Cite this collection

Coustan, Laura; Tarascon, Jean-Marie; Laberty-Robert, Christel (2019): Thin

Fiber-Based Separators for High-Rate Sodium Ion

Batteries. ACS Publications. Collection.