Polymer electrolytes based on an electrospun poly(vinylidene fluoride-co-hexafluoropropylene) membrane for lithium batteries

Li, Xin; Cheruvally, Gouri; Kim, Jae Kwang; Choi, Jae-Won; Ahn, Jou–Hyeon; Kim, Ki-Won; Ahn, Hyo‐Jun

doi:10.1016/j.jpowsour.2007.02.032

Cited by 167 publications

(102 citation statements)

References 23 publications

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“…Figure 8 shows the linear sweep voltammogram of liquid electrolyte-soaked FS fibrous cellulose membrane and compares with that of liquid electrolytesoaked PP separator. The voltage corresponding to the onset of a rapid increase in the current indicates the electrochemical stability limit of the electrolyte-soaked membranes Jung et al 2009;Li et al 2007). It can be seen that the electrolyte with the PP separator decomposes at about 4.3 V, which is in good accordance with a previous report (Yanilmaz et al 2014), while FS cellulose nonwoven membrane exhibits anodic oxidation stability up to 4.7 V. This result indicates that the developed cellulose membrane possesses better compatibility with carbonate electrolyte and is expected to be more stable within the operating voltage range than PP separators.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Fibrous cellulose membrane mass produced via forcespinning® for lithium-ion battery separators

Weng¹,

Xu²,

Alcoutlabi³

et al. 2015

Cellulose

110

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In this study, fibrous cellulose membranes were successfully mass produced by forcespinning Ò cellulose acetate, followed by alkaline hydrolysis treatment. Its performance as lithium-ion battery separator was evaluated. The cellulose membrane exhibits a randomly-oriented, fully-interconnected and highly porous three-dimensional fibrous network structure with a high porosity of 76 %. The developed membranes show good electrolyte wettability and high electrolyte uptake capability. Differential scanning calorimetry and thermal treatment show a superior thermal stability of the cellulose nonwoven membrane. Compared to commercially available polypropylene based separators, the developed fibrous cellulose membrane displays higher ionic conductivity, lower interfacial resistance and better electrochemical stability. Given its outstanding thermal characteristics and excellent electrochemical performance, this fibrous cellulose membrane has potential to be used as high-performance lithium-ion battery separator. This study provides a novel and feasible pathway for developing promising separators for high-performance lithium ion batteries.

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Section: Electrochemical Propertiesmentioning

confidence: 99%

Fibrous cellulose membrane mass produced via forcespinning® for lithium-ion battery separators

Weng¹,

Xu²,

Alcoutlabi³

et al. 2015

Cellulose

110

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“…It is well known that PVDF-HFP was widely reported as a gel polymer electrolyte in lithium ion battery, whereas the poor mechanical property after gelation hindered its extensive application. [13,32,33,35,36] In our case, the PI@PVDF-HFP nonwovens performed remarkable higher tensile strength of 31 MPa, which was almost as five times as that of the gelated PVDF-HFP membrane [35] and double that of the dip coating PE/PEO&PVDF-HFP membrane. [13] There is no doubt that the thermosetting PI core component mainly contributed to the mechanical reinforcement when the PVDF-HFP sheath layers gelated in liquid electrolyte.…”

Section: Characterization Of the Nonwoven Separatormentioning

confidence: 62%

“…[15,32,33] In our experiment, the homogeneous morphology of PDA-ODA nanofibers could be obtained by using concentration of 20% PDA-ODA in DMAc and its inherent viscosity was 2.11 dL Á g À1 . In this coaxial electrospinning process, the high concentration of 25% PVDF-HFP in DMF was used as the sheath solution.…”

Section: Preparation Of Pi@pvdf-hfp Nanofibrous Nonwovensmentioning

confidence: 64%

A Core@sheath Nanofibrous Separator for Lithium Ion Batteries Obtained by Coaxial Electrospinning

Liu

Jiang

Kong

et al. 2012

Macro Materials & Eng

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A composite core@sheath nanofibrous separator for lithium ion batteries is fabricated via coaxial electrospinning, using thermosetting PI as the core material and PVDF‐HFP as the sheath material. It is demonstrated that the PI@PVDF‐HFP nonwovens display remarkably improved tensile strength up to 53 MPa and high thermal stability up to 300 °C. The electrochemical characterization shows that cells using core@sheath nonwovens as separators display better rate capability and better cycling capacity retention. Considerable mechanical strength, higher thermal stability and preferable rate capability might make this kind of core@sheath nonwovens promising separators for higher‐power application. magnified image

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“…22 First, PVDF-HFP was dissolved in a mixed-solvent of acetone and N,Ndimethylacetamide (7 : 3 wt% ratio) to obtain a 16 wt% solution. Then, the solution was electrospun at room temperature under xed conditions.…”

Section: Preparation Of the Electrospun Membranementioning

confidence: 99%

Deformable and flexible electrospun nanofiber-supported cross-linked gel polymer electrolyte membranes for high safety lithium-ion batteries

Tong

Chen

et al. 2017

RSC Adv.

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A deformable and flexible cross-linked composite gel polymer electrolyte (CGPE) membrane, blended with an ionic liquid (IL) diluent, was successfully prepared for lithium-ion batteries. Herein, a cross-linked composite gel polymer electrolyte membrane in the presence of an IL resulted in the formation of a solid-like, elastic gel directly within the poly(vinylidene fluoride-co-hexafluoropropylene) electrospun skeleton via in situ UV-induced cross-linking of poly(ethylene glycol)methyl ether methacrylate (PEGMA), pentaerythritol tetraacrylate, and PEGMA monomers. The CGPE membrane exhibited significantly improved film flexibility and prevented liquid leakage while maintaining some advantageous features such as good liquid retention, high ionic conductivity, and good thermal stability. Moreover, the CGPE-3 exhibited the best performance, with a wide electrochemical potential window of up to 5.0 V vs. Li + /Li and a high ionic conductivity of 1.7 Â 10 À3 S cm À1. The Li/CGPE/LiFePO 4 cells with CGPE-3 exhibited stable electrochemical performance and yielded specific capacities of 160, 150, 136, 122, and 91 mA h g À1 at 0.1, 0.2, 0.5, 1.0, and 2.0C rates, respectively; moreover, they retained their properties well after 100 cycles for each rate. These solid-like gel polymer electrolyte membranes with excellent properties represent a very promising material for high-performance lithium-ion batteries with improved safety and reliability.

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Polymer electrolytes based on an electrospun poly(vinylidene fluoride-co-hexafluoropropylene) membrane for lithium batteries

Cited by 167 publications

References 23 publications

Fibrous cellulose membrane mass produced via forcespinning® for lithium-ion battery separators

Fibrous cellulose membrane mass produced via forcespinning® for lithium-ion battery separators

A Core@sheath Nanofibrous Separator for Lithium Ion Batteries Obtained by Coaxial Electrospinning

Deformable and flexible electrospun nanofiber-supported cross-linked gel polymer electrolyte membranes for high safety lithium-ion batteries

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