Porous PAN micro/nanofiber separators for enhanced lithium-ion battery performance

Sabetzadeh, Niloufar; Gharehaghaji, Ali Akbar; Javanbakht, Mehran

doi:10.1016/j.ssi.2018.08.013

Cited by 38 publications

(29 citation statements)

References 39 publications

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“…Electrospinning has been extensively studied and used to produce nonwoven polymer fibers with a wide range of sizes (micron to nano) and characteristics for various applications from tissue engineering and drug delivery to chemical separation and sensors . One of the major advantages of electrospinning is its versatility which is due to many ambient, materials and processing parameters associated with this technique .…”

Section: Introductionmentioning

confidence: 99%

“…One of the major advantages of electrospinning is its versatility which is due to many ambient, materials and processing parameters associated with this technique . Electrospun membranes have high specific surface area (SSA) and porosity with interconnected and open interfibrillar pores which are essential characteristics for many applications including tissue engineering, microfiltration, oil/water separation, and in lithium‐ion batteries as separators . The performance and efficiency of electrospun membranes used in these applications can be substantially enhanced by further increasing their SSA which can be achieved through various approaches such as creating nanoscale and/or highly porous fibers .…”

Section: Introductionmentioning

confidence: 99%

“…Electrospun membranes have high specific surface area (SSA) and porosity with interconnected and open interfibrillar pores which are essential characteristics for many applications including tissue engineering, microfiltration, oil/water separation, and in lithium‐ion batteries as separators . The performance and efficiency of electrospun membranes used in these applications can be substantially enhanced by further increasing their SSA which can be achieved through various approaches such as creating nanoscale and/or highly porous fibers . Depending on the solution, breath figures, thermally induced phase separation (TIPS) and humidity (water) induced phase separation can create pores, mostly on the surface of the fibers, during electrospinning ( Figure a) .…”

Section: Introductionmentioning

confidence: 99%

“…More recently, a promising approach for creating well‐defined pores within electrospun fibers has gained interest wherein a nonsolvent is incorporated in situ or via mechanical mixing into a polymer–solvent solution to induce phase separation prior to electrospinning. In other approaches, nonsolvents have also been introduced into the system as vapor, or a coagulation bath during and immediately after the electrospinning process, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The high SSA (Table ) and porous microstructure of the fibers electrospun from NIPST systems can improve the in‐service efficiency and performance of their membranes in comparison with those electrospun from binary solutions, making them more attractive for the common applications of membranes mentioned above as well as new applications. Depending on the NIPST system and the used ambient and processing parameters, electrospun membranes with SSA between 3.82 and 52.6 m 2 g −1 (Table ) have been produced and reported. The high porosity and surface roughness of these fibers facilitate the deposition of nanoparticles and incorporation of drug molecules .…”

Section: Introductionmentioning

confidence: 99%

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Ultraporous Membranes Electrospun from Nonsolvent‐Induced Phase‐Separated Ternary Systems

Rezabeigi

Demarquette

2019

Macromol. Rapid Commun.

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Electrospinning of nonsolvent‐induced phase‐separated ternary (NIPST) systems has gained a lot of interest due to its potential to produce (nano)fibers, which are superficially and internally porous with nanoscale surface roughness. Membranes produced from such systems are expected to have a high specific surface area (SSA; e.g., more than 50 m2 g−1), an essential requirement for many of their applications. In spite of their advantages and potential, there are major issues regarding the electrospinning of NIPST systems that are not systematically addressed in the literature. In this paper, the most recent developments are reported and the potential and challenges associated with the electrospinning of NIPST systems are discussed. Furthermore, the essential steps to improve and optimize the electrospinning process of these systems are concisely discussed. By developing a modified time‐dependent rheological model, a time range can be defined for NIPST systems as “electrospinnability window,” in which fiber functionality and characteristics can be tailored through aging of the systems prior to electrospinning. Some potential post‐treatment processes are also proposed based on the results of recent studies to stabilize as‐electrospun membranes without damaging their highly porous fibers, which can guarantee their in‐service mechanical and morphological stability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultraporous Membranes Electrospun from Nonsolvent‐Induced Phase‐Separated Ternary Systems

Rezabeigi

Demarquette

2019

Macromol. Rapid Commun.

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Polymer‐Based Separators for Lithium‐Ion Batteries

Barbosa

Costa

Lanceros‐Méndez

2019

Nanomaterials for Electrochemical Energy Storage Devices

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Lithium-ion batteries stand out among the different energy storage systems, increasingly important in modern society. The separator membrane is one of the main components of battery systems, it is placed between the electrodes, represents the medium for the transfer of lithium ions and it is typically based on a polymeric membrane soaked with the electrolyte solution.This chapter focuses on the recent advances on polymer-based separators for lithium-ion batteries. It is divided by the processing techniques of the membranes, such as, solvent casting, electrospinning, surface modification and coating process. In addition, the recent advances based on natural and biopolymers are presented. Finally, the main conclusions for each membrane are presented, as well as the future trends in the area.

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Improvement of PAN separator properties using PVA/malonic acid by electrospinning in lithium ion‐batteries

Khodaverdi

Vaziri

Javanbakht

et al. 2020

J of Applied Polymer Sci

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The prominent objective of this study is to improve the thermal shrinkage and wettability of lithium-ion battery membrane separators based on Polyacrylonitrile (PAN) formed using an electrospinning technique. To achieve this goal, a PAN blended with highly hydrophilic Polyvinylalcohol (PVA) is formed, using malonic acid (MA) as a cross-linker. Due to the excellent hydrophilic properties of PVA and the network formation inside the separators (because of the MA crosslinker presence), the results show significant improvement in the separator properties. For this reason, at the optimum concentrations of 5 wt.% PVA and 5 wt.% MA (sample F4), an increase of wettability (contact angle from 85 for pure PAN to 42 for the F4 separator) is able to be seen. The electrolyte uptake was significantly increased, as for the F4 sample is increased to 1,150%, which is 2.67 times higher than the PAN with 430%. The improved separators showed higher porosity, better tensile strength, lower thermal shrinkage, and better electrochemical performance than the pure PAN separator. It showed an ion conductivity of 3.03 mS/cm, a wide electrochemical stability window of 5.2 V and an initial discharge capacity of 156.4 mAh/g.

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Porous PAN micro/nanofiber separators for enhanced lithium-ion battery performance

Cited by 38 publications

References 39 publications

Ultraporous Membranes Electrospun from Nonsolvent‐Induced Phase‐Separated Ternary Systems

Ultraporous Membranes Electrospun from Nonsolvent‐Induced Phase‐Separated Ternary Systems

Polymer‐Based Separators for Lithium‐Ion Batteries

Improvement of PAN separator properties using PVA/malonic acid by electrospinning in lithium ion‐batteries

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