PHOTO AND THERMAL CROSSLINKED POLY(VINYL ALCOHOL)-BASED NANOFIBER MEMBRANE FOR FLEXIBLE GEL POLYMER ELECTROLYTE
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Date
2021-12-14
Authors
Kassenova, Nazym
Kalybekkyzy, Sandugash
Kahraman, Memet Vezir
Mentbayeva, Almagul
Bakenov, Zhumabay
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Power Sources
Abstract
Novel dual crosslinked nanofibrous membranes (DCNMs) were fabricated by a combination of UV photocrosslinking and thermal sol-gel crosslinking procedures and used as a matrix for gel polymer electro lytes for lithium-ion batteries (LIBs). Flexible nanofibrous membranes were obtained from the solution of poly
(vinyl alcohol) (PVA), maleated PVA (PVA-MA), polyethylene glycol diacrylate (PEGDA), and tetraethyl
orthosilicate (TEOS) by electrospinning technique. As a matrix for gel polymer electrolyte (GPE), it showed
significantly higher ionic conductivity of 1.98 × 10− 3 S cm− 1 than the commercial separators and pure PVDF
based GPE. Incorporation of TEOS into the membrane composition, and formation of siloxane bonds (Si–O–Si)
greatly increased the conductivity providing excellent mechanical and thermal stability. The assembled lithium
metal cell with LiFePO4 cathode exhibited excellent cycling performance and delivered a high reversible capacity
of 133 mA h g− 1 at 0.1 C and retained 87% of the initial discharge capacity after 150 cycles with a stable
coulombic efficiency near 100%. The GPE could substantially suppressed the growth of Li dendrites during the
stably cycles up to 1000 h, while the cell with the commercial separator failed within 800 h. In consequence, this
novel DCNM possesses a potential for application in flexible and safe Li-ion and Li-metal batteries
Description
Keywords
Type of access: Open Access, Gel polymer electrolyte, Electrospinning, UV-crosslinking, Maleated polyvinyl alcohol, Tetraethyl orthosilicate, Lithium-ion battery
Citation
Kassenova, N., Kalybekkyzy, S., Kahraman, M. V., Mentbayeva, A., & Bakenov, Z. (2022). Photo and thermal crosslinked poly(vinyl alcohol)-based nanofiber membrane for flexible gel polymer electrolyte. Journal of Power Sources, 520, 230896. https://doi.org/10.1016/j.jpowsour.2021.230896