Surface modification of polypropylene battery separator by direct fluorination with different gas components

Li, Baoyin; Gao, Jie; Wang, Xu; Fan, Cong; Wang, Huina; Li, Xiangyang

doi:10.1016/j.apsusc.2013.11.015

Cited by 21 publications

(8 citation statements)

References 28 publications

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“…Thus, oxyfluorination leads to hydrophilization of the polymer surface [30,36,[98][99][100][101]. The hydrophilization effect was also observed for the oxyfluorination of polypropylene-based materials [30,73,102]. At long times of fluorination and a higher concentration of fluorine in the mixture, the content of fluorine in the surface layer increases, which leads to hydrophobization of the surface.…”

Section: Changes In the Hydrophilicity/hydrophobicity Of The Polymer Surface As A Results Of Fluorinationmentioning

confidence: 96%

“…Thus, oxyfluorination leads to hydrophilization of the polymer surface [30,36,[98][99][100][101]. The hydrophilization effect was also observed for the oxyfluorination of polypropylene-based materials [30,73,102]. In the case of materials with a considerable microrelief of the surface, information is needed about whether the wetting mode is homogeneous (a liquid is continuously in contact with a solid surface) or heterogeneous (liquid contacts only the vertices of the microrelief of a solid surface) [41,104].…”

Section: Changes In the Hydrophilicity/hydrophobicity Of The Polymer Surface As A Results Of Fluorinationmentioning

confidence: 99%

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Direct Fluorination as Method of Improvement of Operational Properties of Polymeric Materials

et al. 2020

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Direct fluorination of polymers is a widely utilized technique for chemical modification. Such introduction of fluorine into the chemical structure of polymeric materials leads to laminates with highly fluorinated surface layer. The physicochemical properties of this layer are similar to those of perfluorinated polymers that differ by a unique combination of chemical resistance, weak adhesion, low cohesion, and permittivity, often barrier properties, etc. Surface modification by elemental fluorine allows one to avoid laborious synthesis of perfluoropolymers and impart such properties to industrial polymeric materials. The current review is devoted to a detailed consideration of wetting by water, energy characteristics of surfaces, adhesion, mechanical and electrical properties of the polymers, and composites after the direct fluorination.

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Section: Changes In the Hydrophilicity/hydrophobicity Of The Polymer Surface As A Results Of Fluorinationmentioning

confidence: 96%

“…Thus, oxyfluorination leads to hydrophilization of the polymer surface [30,36,[98][99][100][101]. The hydrophilization effect was also observed for the oxyfluorination of polypropylene-based materials [30,73,102]. In the case of materials with a considerable microrelief of the surface, information is needed about whether the wetting mode is homogeneous (a liquid is continuously in contact with a solid surface) or heterogeneous (liquid contacts only the vertices of the microrelief of a solid surface) [41,104].…”

Section: Changes In the Hydrophilicity/hydrophobicity Of The Polymer Surface As A Results Of Fluorinationmentioning

confidence: 99%

Direct Fluorination as Method of Improvement of Operational Properties of Polymeric Materials

et al. 2020

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“…[153] Li et al treated the PP separators by direct fluorination in aF 2 /N 2 or F 2 /O 2 /N 2 gas atmosphere,w hich resulted in the formation of polar groups such as -C À F x and -C = O(OH) on the separator surface and, thus,s ignificantly enhanced the alkali absorption ratio. [154] Meanwhile,the physical structure of the PP separator was unchanged. Shin et al modified PE separators by surface coating them with conductive PEDOT-co-PEG copolymer and AlF 3 particles.This coating dramatically reduced the thermal shrinkage,e nhanced the electrolyte uptake, defended against attack by HF,a nd improved the battery properties such as cycling stability and rate capability.…”

Section: Other Applicationsmentioning

confidence: 99%

Halide‐Based Materials and Chemistry for Rechargeable Batteries

et al. 2020

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Rechargeable batteries are considered one of the most effective energy storage technologies to bridge the production and consumption of renewable energy. The further development of rechargeable batteries with characteristics such as high energy density, low cost, safety, and a long cycle life is required to meet the ever‐increasing energy‐storage demands. This Review highlights the progress achieved with halide‐based materials in rechargeable batteries, including the use of halide electrodes, bulk and/or surface halogen‐doping of electrodes, electrolyte design, and additives that enable fast ion shuttling and stable electrode/electrolyte interfaces, as well as realization of new battery chemistry. Battery chemistry based on monovalent cation, multivalent cation, anion, and dual‐ion transfer is covered. This Review aims to promote the understanding of halide‐based materials to stimulate further research and development in the area of high‐performance rechargeable batteries. It also offers a perspective on the exploration of new materials and systems for electrochemical energy storage.

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“…To verify this, Li et al [52] directly fluorinated the PP separator under a F 2 /N 2 gas atmosphere. Results showed that the fluorination did not change the size and shape of micropores, instead significantly introduced CF x groups into the surfaces of PP separator.…”

Section: Chemical Modificationmentioning

confidence: 94%