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    Syringeless electrospinning of PVDF/SiO2 as separator membrane for high-performance lithium-ion batteries

    Year: 2022

    Journal: Mater. Chem. Phys., Volume 288, SEP 1

    Authors: Jeong, Hanjin; Hwang, Jongha; Kim, Jimi; Song, Woo-Jin; Lee, Kyung Jin

    Organizations: Korea Evaluation Institute of Industrial Technology (KEIT) [20010853]; National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2022R1C1C1009974]

    Keywords: Lithium-ionbattery; Electrospinning; Non-wovenweb; Separator; Crate

    Lithium-ion batteries (LIBs) have attained great attention nowadays as a next-generation energy solution, but all of the current components need to be improved in order to meet the requirement for LIBs with mid-/high power density and capacity. Especially, the stretched olefin membrane as a separator should be reconsidered because it contains intrinsic limitations in pore size and electrolyte wettability, which is directly related to fast charge/ discharge rate of LIBs. Electrospun non-woven nanofiber web has been considered as a promising candidate to improve Li-ion transportation. However, several features should be addressed for practical applications, such as the production rate (and cost) of the electrospun non-woven web, mechanical properties, and corresponding safety. In this paper, we present the electrospun non-woven web composed of PVDF based composite nanofiber as a separator in LIBs using syringeless electrospinning. Syringeless electrospinning can increase their production rate over at least 8 times higher than conventional electrospinning. In addition, this method is advantageous to incorporate colloidal inorganic fillers into the non-woven web, which makes it possible to increase the me-chanical strength and electrolyte wettability. The LIBs with our non-woven separator shows improved electro-chemical performances over that with the olefin separator.
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