A porous poly (vinylidene fluoride-co-hexafluoropropylene) based separator-cum-gel polymer electrolyte for sodium-ion battery

Janakiraman, S.; Padmaraj, O.; Ghosh, Sudipto; Venimadhav, A.

doi:10.1016/j.jelechem.2018.08.032

Cited by 51 publications

(19 citation statements)

References 26 publications

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“…The ionic conductivity of prepared PVDF-SiO 2 separator membrane was carried and compared with commercially available celgard-2400 (PP) monolayer membrane and cellulose (NKK, Kochi, Japan) membrane to analyze the performance in sodium electrolyte solution. From the obtained results, the prepared PVdF-SiO 2 separator membrane showed high ionic conductivity of 4.7 × 10 −2 S cm −1 at room temperature among all samples studied and also higher than previous reports [20][21][22][23]. Furthermore, the ionic conductivity of the prepared PVdF-SiO 2 was examined at various temperature (room temperature, 40, 50, and 70 • C) it were exhibited good ionic conduction property Figure 4b and the comparison of ionic conductivity of all membrane tabulated in Table 1.…”

Section: Electrochemical Analysismentioning

confidence: 55%

“…Kumar et al [21] reported PMMA-EC-PC-NaClO 4 -based gel-polymer electrolyte for sodium ion battery with notable ionic conductivity of 3.4 mS cm −1 and Harshlata et al [22] reported polymer electrolyte membrane prepared by phase inversion technique for Sodium ion conduction with ionic conduction value of 0.3 Ms cm −1 at room temperature. Janakiraman et al [23] prepared a porous PVdF-HFP-based separator-cum-gel polymer electrolyte for sodium-ion battery whose ionic conduction value was 1.13 mS cm −1 .…”

Section: Introductionmentioning

confidence: 99%

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Superior Ionic Transferring Polymer with Silicon Dioxide Composite Membrane via Phase Inversion Method Designed for High Performance Sodium-Ion Battery

et al. 2020

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Superior sodium-ion-conducting polymer poly(vinyledene fluoride)–silicon dioxide (PVdF-SiO2) composite separator membrane was prepared via simple phase inversion method, which is a suitable alternative conventional polypropylene membrane. Basically, PVdF is the promising for use as high porous polymer electrolyte membrane due to its high dielectric constant (ε = 8.4). In this work, we prepared a composite membrane using PVdF-SiO2 via phase inversion method. This work was systematically studied towards the morphology, porosity, and electrochemical properties of as prepared membrane. The electrolyte uptake capability of separator membrane tested with 1 M NaPF6 electrolyte solution and temperature-dependent ionic conduction test were performed at various temperatures. This membrane exhibits higher ionic conductivity of 4.7 × 10−2 S cm−1 at room temperature. The physical properties were analyzed by X-ray diffraction, FT-IR, and FE-SEM micrographs analyses. The electrochemical performances with impedance analysis carried for prepared membrane with the as-prepared sodium P2-type cathode material. The material showed an initial discharge capacity of 178 mAh g−1 at 0.1 C between 2 and 4 V with 98% columbic efficiency and 81% capacity retention after 50 cycles upon using the as-prepared PVdF-SiO2 composite separator membrane.

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Section: Electrochemical Analysismentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Superior Ionic Transferring Polymer with Silicon Dioxide Composite Membrane via Phase Inversion Method Designed for High Performance Sodium-Ion Battery

et al. 2020

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“…[ 94,95 ] Poly(vinylidene fluoride‐hexafluoropropylene) (PVDF‐HFP), consisting of a crystalline phase (‐VDF) for mechanical enhancement and an amorphous phase (‐HFP) for reducing the degree of crystallinity, exhibits a high dielectric constant (ε = 8.4), outstanding mechanical strength, excellent electrochemical stability, and thermal stability, and is one of the most commonly used PE matrices. [ 96 ] Due to extremely low glass transition temperature of polyphosphazenes (PAN), PAN‐based electrolytes are conducive to improving ionic conductance, and have excellent oxidation resistance and thermal stability. [ 97 ] However, their mechanical strength and reduction‐resistive ability are not sufficient, and their synthesis route is relatively complex.…”

Section: Advantages and Ionic Migration Mechanism Of Pes For Sibs/kibsmentioning

confidence: 99%

Recent Advances and Perspectives on the Polymer Electrolytes for Sodium/Potassium‐Ion Batteries

Yin

Han

Liu

et al. 2021

Small

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Owing to the low cost of sodium/potassium resources and similar electrochemical properties of Na+/K+ to Li+, sodium‐ion batteries (SIBs) and potassium‐ion batteries (KIBs) are regarded as promising alternatives to lithium‐ion batteries (LIBs) in large‐scale energy storage field. However, traditional organic liquid electrolytes bestow SIBs/KIBs with serious safety concerns. In contrast, quasi‐/solid‐phase electrolytes including polymer electrolytes (PEs) and inorganic solid electrolytes (ISEs) show great superiority of high safety. However, the poor processibility and relatively low ionic conductivity of Na+ and K+ ions limit the further practical applications of ISEs. PEs combine some merits of both liquid‐phase electrolytes and ISEs, and present great potentials in next‐generation energy storage systems. Considerable efforts have been devoted to improving their overall properties. Nevertheless, there is still a lack of an in‐depth and comprehensive review to get insights into mechanisms and corresponding design strategies of PEs. Herein, the advantages of different electrolytes, particularly PEs are first minutely reviewed, and the mechanism of PEs for Na+/K+ ion transfer is summarized. Then, representative researches and recent progresses of SIBs/KIBs based on PEs are presented. Finally, some suggestions and perspectives are put forward to provide some possible directions for the follow‐up researches.

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“…[36,37,38] Furthermore, the amorphous nature of HFP copolymer can reduce the degree of crystallinity, and hence enhance the ionic conductivity of separators. [39] Therefore in this work, PVDF-HFP was used as the "sticking earth" to bind the crossed but not linked SiO 2 nanowires for building the nest-like SiO 2 /PVDF-HFP hybrid separators. The applied ultra-long SiO 2 nanowires, namely the basic building block of separators, can strongly be interconnected with each other by the addition of PVDF-HFP.…”

Section: Introductionmentioning

confidence: 99%

Silica Nanowires Reinforced with Poly(vinylidene fluoride‐co‐hexafluoropropylene): Separator for High‐Performance Lithium Batteries

Shi

Yan

et al. 2021

ChemNanoMat

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Separators are key components that physically separate and chemically connect the anode and cathode to guarantee the safety and cycle stability of batteries. Herein, based on the building concept of a bird's nest, we have developed separators comprising SiO 2 nanowires reinforced with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP). In particular, the hybrid separators with 39% of PVDF-HFP exhibit much enhanced tensile strength, Young's moduli, flexibility, and elongation as a result of a strong crosslink effect, compared to bare SiO 2 nanowire separator, while yet maintaining excellent electrolyte wettability, high ionic conductivity, and wide electrochemical window. Moreover, the hybrid separators also demonstrate excellent thermal stability and dendrite suppression capability. Lithium metal batteries assembled using the hybrid separators with LiFePO 4 as the cathode achieve excellent rate performance and cyclic stability. The discharge capacities attained at a current density equivalent to 0.2 C and 2 C rate are 157 and 126 mAh g À 1 , respectively. A capacity of 99 mAh g À 1 is still maintained at 2 C rate after 500 cycles. This study illuminates SiO 2 nanowires reinforced with PVDF-HFP as promising separators for high-energy, high-power and safe lithium batteries.

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A porous poly (vinylidene fluoride-co-hexafluoropropylene) based separator-cum-gel polymer electrolyte for sodium-ion battery

Cited by 51 publications

References 26 publications

Superior Ionic Transferring Polymer with Silicon Dioxide Composite Membrane via Phase Inversion Method Designed for High Performance Sodium-Ion Battery

Superior Ionic Transferring Polymer with Silicon Dioxide Composite Membrane via Phase Inversion Method Designed for High Performance Sodium-Ion Battery

Recent Advances and Perspectives on the Polymer Electrolytes for Sodium/Potassium‐Ion Batteries

Silica Nanowires Reinforced with Poly(vinylidene fluoride‐co‐hexafluoropropylene): Separator for High‐Performance Lithium Batteries

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