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

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

A thermally resistant, high-performance electrospun hybrid PVDF-HFP/SiO2 fiber-based separator (EHS) has been successfully fabricated and its performance for sodium ion batteries explored. The EHS, containing 40% of its weight as SiO2, is made of intermingled nonwoven hybrid organic (PVDF-HFP) inorg...

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Bibliographic Details
Published in:ACS applied energy materials Vol. 2; no. 12; pp. 8369 - 8375
Main Authors: Coustan, Laura, Tarascon, Jean-Marie, Laberty-Robert, Christel
Format: Journal Article
Language:English
Published: American Chemical Society 23-12-2019
ACS
Subjects:
Chemical Sciences
Material chemistry
Na battery
electrospinning
separators
hybrid organic−inorganic
safety
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Summary:A thermally resistant, high-performance electrospun hybrid PVDF-HFP/SiO2 fiber-based separator (EHS) has been successfully fabricated and its performance for sodium ion batteries explored. The EHS, containing 40% of its weight as SiO2, is made of intermingled nonwoven hybrid organic (PVDF-HFP) inorganic (SiO2) 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 Al2O3-coated PP and cellulose separators. Full NVPF//NaPF6-EC:PC//hard carbon cells using EHS show low ionic resistance, excellent rate capability, cycling retention, and longer short-circuit time.
ISSN:2574-0962
2574-0962
DOI:10.1021/acsaem.9b01821