Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Jia, Shiru; Huang, Kaili; Long, Jiating; Yang, Shaohua; Liang, Yuhao; Yang, Na; Xiao, Jun

doi:10.1002/app.50359

Cited by 9 publications

(7 citation statements)

References 52 publications

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“…21–1307). [ 31 ] As expected, the sharp peaks in the XRD proved that the large particles produced by the hydrothermal reaction were AlO(OH).…”

Section: Resultssupporting

confidence: 55%

“…added polyacrylonitrile (PAN) to PVDF, which significantly improved the mechanical properties of the resulting electrospun separator. In particular, the discharge‐specific capacity reached 155 mAh g −1 at 0.5 C. [ 31 ] In addition, the separator prepared by electrospinning featured high porosity, surface area, electrolyte absorption rate, and ionic conductivity. [ 32–35 ] Klein et al.…”

Section: Introductionmentioning

confidence: 99%

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Electrospun Polyacrylonitrile/Polyvinylidene Fluoride/Boehmite Separator and Gel Polymer Electrolyte Polyethylene Oxide/Polyvinylidene Fluoride‐hexafluoropropylene/Lithium Bis(trifluoromethanesulfonyl)imide/Boehmite Composite Separator Are Used for Fast Charging

Tan

Jia

2023

Macro Materials & Eng

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With the increasing popularity of electric vehicles, the fast charging of lithium (Li) batteries is attracting increasing attention. However, the rapid decline in battery capacity caused by fast charging and accidents caused by Li dendrites piercing the separator greatly restrict fast‐charging applications. Herein, an electrospun polyacrylonitrile/polyvinylidene fluoride/boehmite (PAN/PVDF/12 wt.% AlO(OH)) and gel polymer polyethylene oxide/polyvinylidene fluoride‐hexafluoropropylene/lithium bis(trifluoromethanesulfonyl)imide/boehmite (PEO/PVDF‐HFP/12.6 wt.% LiTFSI /10 wt.% AlO(OH)) pressed together to form a two‐layer functional separator is designed. The electrospun separator improves the high‐temperature resistance of the entire separator due to its special structure. After the 1 h heat treatment at 220 °C, the thermal shrinkage rate of the double‐layer separator reaches 10.1%, showing good thermal stability. At 0.2 C, the discharge capacity retention rate is 99.4% after 100 cycles. After 1000 cycles at a rate of 10 C, the discharge capacity remains at 88% of the initial value. The two‐layer separator exhibits better capacity retention and superior rate performance than PP, providing an effective approach for commercializing fast‐charging functional separators.

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“…21–1307). [ 31 ] As expected, the sharp peaks in the XRD proved that the large particles produced by the hydrothermal reaction were AlO(OH).…”

Section: Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Electrospun Polyacrylonitrile/Polyvinylidene Fluoride/Boehmite Separator and Gel Polymer Electrolyte Polyethylene Oxide/Polyvinylidene Fluoride‐hexafluoropropylene/Lithium Bis(trifluoromethanesulfonyl)imide/Boehmite Composite Separator Are Used for Fast Charging

Tan

Jia

2023

Macro Materials & Eng

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“…To obtain this, various methods have been implemented to modify the superficial properties of a polymer such as surface energy, roughness, and functional groups. Plasma treatment, 17 ion implantation, 29 electron beam irradiation, 30 and flame‐treatment 31 are the several types of these techniques. Among them, plasma treatment is a well‐known invasive technique to activate or functionalize upper layer (about few nanometers) of a polymer surface without employing chemicals or creating undesirable wastes 32 .…”

Section: Discussionmentioning

confidence: 99%

Physical modification approaches to enhance cell supporting potential of poly (vinyl alcohol)‐based hydrogels

Firoozi

Entezam

Masaeli

et al. 2021

J of Applied Polymer Sci

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PVA‐based hydrogels with tissue engineered scaffolds application commonly need further modification to improve cell‐matrix interactions with respect to subsequent cell proliferation and differentiation. In this study, PVA‐modified hydrogels were formed by subjecting the solutions of PVA/Poly (R‐3‐hydroxybutyrate) (PHB), PVA/Extracellular Matrix (ECM), and PVA/PHB/ECM to freeze–thaw cycles and additive materials effect on cell supporting potential of the hydrogels was investigated. As, limited cell attachment and spreading were observed on PVA blended hydrogels, air plasma surface modification has been performed to promote cell attachment. Attenuated total reflection Fourier transform infrared (ATR‐FTIR) spectroscopy revealed the presence of some reactive bonds such as carbonyl on pure and amide on ECM‐coated PVA after plasma exposure. Atomic force microscopy (AFM) also proved increased roughness of hydrogel surface due to the plasma treatment. Plasma modification positive effect on cytoskeleton arrangement of cultured equine adipose derived stem cells (eASCs) was then confirmed by DAPI/phalloidin staining and scanning electron microscopy (SEM) imaging. In summary, among different physical modification approaches, coating with ECM fallowed by air plasma treatment had the most significant effect on cell‐hydrogel interactions. Thus, this combined modification method can be utilized to improve initial attachment and subsequent phenotype of cultured cells on PVA hydrogels for tissue engineering applications.

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“…One of the most commonly electrospun polymers for LSB separators is polyacrylonitrile (PAN) because it is easy to process, resistant to oxidation, and has high thermal resilience [ 42 , 43 , 44 ]. PAN is also a common precursor for CNFs [ 45 ], which are examined in more detail in Section 3 .…”

Section: Novel Nanofiber Separatorsmentioning

confidence: 99%

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

2023

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Lithium-Sulfur batteries (LSBs) are one of the most promising next-generation batteries to replace Li-ion batteries that power everything from small portable devices to large electric vehicles. LSBs boast a nearly five times higher theoretical capacity than Li-ion batteries due to sulfur’s high theoretical capacity, and LSBs use abundant sulfur instead of rare metals as their cathodes. In order to make LSBs commercially viable, an LSB’s separator must permit fast Li-ion diffusion while suppressing the migration of soluble lithium polysulfides (LiPSs). Polyolefin separators (commonly used in Li-ion batteries) fail to block LiPSs, have low thermal stability, poor mechanical strength, and weak electrolyte affinity. Novel nanofiber (NF) separators address the aforementioned shortcomings of polyolefin separators with intrinsically superior properties. Moreover, NF separators can easily be produced in large volumes, fine-tuned via facile electrospinning techniques, and modified with various additives. This review discusses the design principles and performance of LSBs with exemplary NF separators. The benefits of using various polymers and the effects of different polymer modifications are analyzed. We also discuss the conversion of polymer NFs into carbon NFs (CNFs) and their effects on rate capability and thermal stability. Finally, common and promising modifiers for NF separators, including carbon, metal oxide, and metal-organic framework (MOF), are examined. We highlight the underlying properties of the composite NF separators that enhance the capacity, cyclability, and resilience of LSBs.

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Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Cited by 9 publications

References 52 publications

Electrospun Polyacrylonitrile/Polyvinylidene Fluoride/Boehmite Separator and Gel Polymer Electrolyte Polyethylene Oxide/Polyvinylidene Fluoride‐hexafluoropropylene/Lithium Bis(trifluoromethanesulfonyl)imide/Boehmite Composite Separator Are Used for Fast Charging

Electrospun Polyacrylonitrile/Polyvinylidene Fluoride/Boehmite Separator and Gel Polymer Electrolyte Polyethylene Oxide/Polyvinylidene Fluoride‐hexafluoropropylene/Lithium Bis(trifluoromethanesulfonyl)imide/Boehmite Composite Separator Are Used for Fast Charging

Physical modification approaches to enhance cell supporting potential of poly (vinyl alcohol)‐based hydrogels

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

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