Electrospun polyimide-composite separator for lithium-ion batteries

Jaritphun, Shayapat; Chung, Ok Hee; Park, Jun Seo

doi:10.1016/j.electacta.2015.04.142

Cited by 128 publications

(76 citation statements)

References 61 publications

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“…As one of the techniques to overcome the drawback of the polyolefin separators, polyimide (PI) nanofibrous nonwoven membranes fabricated by electrospinning have drawn the most widespread attention due to their excellent thermal stability, high porosity, and superior wettability . Nevertheless, the tensile strength of PI nanofibrous nonwoven membranes prepared by electrospinning is relatively low because PI nanofibers are only randomly overlapped together with no braided structure or any strong interaction .…”

Section: Introductionmentioning

confidence: 99%

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

et al. 2019

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Herein, an innovative polyimide (PI) nanofibrous membrane with unique bonding microstructures is fabricated for lithium‐ion battery (LIB) separator application via an elaborately designed dipping method using polyamic acid (PAA) glue as the joint binder. Furthermore, the bonding degree can be easily adjusted by simply varying the concentration of PAA glue. The introduction of bonding microstructures into the PI nanofibrous nonwoven membrane leads to the formation of tough 3D networks between PI nanofibers and turns the loose–weak nonwoven membrane to a compact–robust fabric membrane. The tensile strength of the PI nanofibrous membrane is consequently promoted from 5 to 36 MPa, which greatly improves the feasibility of the membrane for the LIB winding process and the safety of the LIB during long‐term running. The cells using the bonded PI nanofibrous separators exhibit an excellent cycling stability and rate capability, manifesting 80.3% capacity retention at 5 C (i.e., 128.5 mAh g−1) and can run stably at a high temperature of 120 °C. Herein, the prepared PI nanofibrous membranes with such bonding microstructures are demonstrated, which have the potential to be advanced separators for secure and high‐power LIBs.

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Section: Introductionmentioning

confidence: 99%

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

et al. 2019

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“…It is known fact that the dispersion of silica in low contents in organic matrix leads to an efficient stress transfer. However, increasing the density of crosslink leads to formation of brittle structure . This layout has also been observed in these experiments as mentioned in the table.…”

Section: Resultsmentioning

confidence: 99%

“…It can be seen from DSC results that Tg values of the hybrids decrease with the addition of Li salt. In literary texts, there are various Tg values for BTDA/ODA PIs . The great variation in Tg values is due to the different methods used in polymer synthesis, and the instrument used in analysis.…”

Section: Resultsmentioning

confidence: 99%

Facile fabrication and characterization of polyimide nanofiber reinforced photocured hybrid electrolyte for Li‐ion batteries

Aytan

Uğur

Kayaman‐Apohan

2017

Polymers for Advanced Techs

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In this study, a novel ion conductive polyimide (PI) nanofiber reinforced photocured hybrid electrolyte has been fabricated. Polyimide fibers were fabricated with the reaction between 4,4′‐oxydianiline (ODA) and 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride (BTDA) followed by electrospinning and thermal imidization methods. Then, PI electrospun fibers were dipped into hybrid resin formulation containing bisphenol A ethoxylate dimethacrylate (BEMA), poly (ethylene glycol) methyl ether methacrylate (PEGMA) and 3‐(methacryloyloxy) propyltrimethoxysilane (MEMO) and then photocured to prepare PI nanofiber reinforced electrolyte membrane. Photocured membranes were soaked into lithium hexafluorophosphate (LiPF6) before measuring electrochemical stability and ionic conductivity of hybrid polyelectrolyte. The chemical structure and electrochemical performance of the electrolytes were examined by Fourier transform infrared (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV) and scanning electron microscopy (SEM) analysis. The incorporation of MEMO into organic matrix effectively increased the modulus from 2.83 to 5.91 MPa. The obtained results showed that a suitable electrolyte for Li‐ion batteries with high lithium uptake ratio, high conductivity (7.2 × 10−3 S cm−1) at ambient temperature and wide stability window above 5.5 V had been prepared. Copyright © 2017 John Wiley & Sons, Ltd.

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“…Electrospinning is a remarkably simple method for producing nanofibers of a wide variety of polymers. Recently, various electrospun fibrous membranes with high melting temperature and hydrophilic groups have been fabricated as the separators for lithium ion battery, such as polyimide, polyacrylonitrile, Polysulfonamide (PSA), Poly(phthalazinone ether sulfone ketone), and Polyethylene terephthalate (PET) . These separators possess small pore size, high porosity and good thermal stability and wettability to electrolytes, making them the ideal alternatives in rechargeable LIBs.…”

Section: Introductionmentioning

confidence: 99%

A poly(ethylene terephthalate) nonwoven sandwiched electrospun polysulfonamide fibrous separator for rechargeable lithium ion batteries

Peng

Wang

2017

J of Applied Polymer Sci

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A poly(ethylene terephthalate) nonwoven sandwiched electrospun polysulfonamide (PSA) fibrous separator was developed for application in lithium‐ion batteries (LIBs). The poly(ethylene terephthalate) nonwoven served as a mechanical support and the PSA layers provided the separators with nanoporous structures. This novel composite separator possessed better thermal stability and electrolyte wettability than commercial polypropylene separator and the sandwiched nonwoven endowed the separator with an improved mechanical strength (17.7 MPa) compared to the pure electrospun PSA separator. The cells assembled with this composite separator displayed excellent discharge capacity (122.0 mAh g−1 after 100 cycles) and discharge C‐rate capacity. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44907.

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Electrospun polyimide-composite separator for lithium-ion batteries

Cited by 128 publications

References 61 publications

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

Robust Polyimide Nanofibrous Membrane with Bonding Microstructures Fabricated via Dipping Process for Lithium‐Ion Battery Separators

Facile fabrication and characterization of polyimide nanofiber reinforced photocured hybrid electrolyte for Li‐ion batteries

A poly(ethylene terephthalate) nonwoven sandwiched electrospun polysulfonamide fibrous separator for rechargeable lithium ion batteries

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