Electrospun PVDF-HFP/PAN bicomponent nanofibers as separators in lithium-ion batteries with high thermal stability and electrolyte wettability
- Authors
- Lee, Jaeseon; Yoon, Jinsoo; Jeon, Jaesung; Hong, Yohan; Oh, Seong-Geun; Huh, Hoon
- Issue Date
- Aug-2023
- Publisher
- KOREAN INSTITUTE CHEMICAL ENGINEERS
- Keywords
- Electrospinning; Bicomponent Nanofiber; PVDF-HFP; PAN; Thermal Stability; Electrolyte Wettability; Separator
- Citation
- KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.40, no.8, pp.1901 - 1911
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- KOREAN JOURNAL OF CHEMICAL ENGINEERING
- Volume
- 40
- Number
- 8
- Start Page
- 1901
- End Page
- 1911
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190209
- DOI
- 10.1007/s11814-023-1486-z
- ISSN
- 0256-1115
- Abstract
- Battery reliability is emerging as a new challenge due to the thermal stability and electrolyte wettability of polyolefin separators used in lithium-ion batteries. In this study, a method to improve the thermal stability and electrolyte wettability of a polyolefin separator is proposed. Bicomponent nanofibers were successfully fabricated by electro-spinning poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) with high ionic conductivity and polyacrylonitrile (PAN) with excellent thermal stability. The nanofiber-based separator of PVDF-HFP/PAN exhibited high porosity (60–76%), electrolyte uptake (≅2,000%), and thermal stability (5%<shrinkage, at 200 °C) than conventional polyolefin separator. The battery using the bicomponent nanofiber separator composed of PVDF-HFP and PAN showed better cycle performance (421 mAh/g, after 80 cycle), efficiency (≅99.6%), and c-rate performance (418 mAh/g, 3C) than the battery using polyolefin separator.
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