Wet-spun PVDF nanofiber separator for direct fabrication of coaxial fiber-shaped supercapacitors

Yang, Zhengpeng; Jia, Yuanheng; Niu, Yutao; Yong, Zhang; Wu, Kunjie; Zhang, Chunjing; Zhu, Meng; Zhang, Yongyi; Li, Qingwen

doi:10.1016/j.cej.2020.125835

Cited by 63 publications

(32 citation statements)

References 36 publications

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“…The energy density reported in this study is larger than most of previously reported FSSs, including supercapacitors based on CNT/MnO 2 and CNT/PPy fibers (18.88 μWh cm –2 ), coaxial graphene fibers (17.50 μWh cm –2 ), graphene/WS 2 fibers (16.86 μWh cm –2 ), graphene/MoS 2 fibers (14.67 μW h cm –2 ), Pt/CNT@PANI yarn (12.68 μWh cm –2 ), CF/Ni/Co fibers (9.57 μWh cm –2 ), rGO/conductive polymer fibers (4.55 μWh cm –2 ), CNT/rGO composite fiber (3.80 μWh cm –2 ), CF/MnO 2 and CF/MoO 3 fibers (2.70 μWh cm –2 ), and CNT/MnO 2 fibers (1.14 μWh cm –2 ) . Meantime, it performs comparably to the FSS based on coaxial graphene fibers (30.8 μWh cm –2 ) . Also, the cyclic stability of fabricated FSS was assessed by GCD tests.…”

Section: Resultscontrasting

confidence: 56%

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High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes

Yan

et al. 2021

ACS Appl. Energy Mater.

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Fiber-shaped supercapacitors (FSSs) are identified as promising facilities in flexible and wearable energy storage fields. In this study, an electrode with excellent formability was accomplished by depositing polypyrrole on highly aligned discontinuous carbon fiber (CF/PPy). For the FSS with core− sheath structure, CF/PPy fiber was the core electrode, LiCl/PVA was the electrolyte, and carbon nanotube/MnO 2 (CNT/MnO 2 ) film was the opposite electrode. The charge of core and opposite electrodes was paired by adjusting the electrochemical reaction times of MnO 2 and PPy. The obtained FSS had an areal capacitance of 66.27 mF cm −2 (lineal capacitance of 13.52 mF cm −1 and volumetric capacitance of 4.08 F cm −3 ) and a broadened potential window of 1.6 V, which resulted in a maximum energy density of 23.56 μWh cm −2 . The cycling stability was evaluated by charge−discharge test, and it retained 83% of its initial capacitance after 5000 cycles. Furthermore, the FSS showed exceptional flexibility and it retained above 90% of its capacitance after 200 repeated bending tests, illustrating excellent mechanical stability.

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Section: Resultscontrasting

confidence: 56%

“…40 Meantime, it performs comparably to the FSS based on coaxial graphene fibers (30.8 μWh cm −2 ). 41 Also, the cyclic stability of fabricated FSS was assessed by GCD tests. As shown in Figure S3, the FSS has a capacitance retention of 83% after 5000 cycles at the current density of 0.76 mA cm −2 .…”

Section: Resultsmentioning

confidence: 99%

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes

Yan

et al. 2021

ACS Appl. Energy Mater.

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“…The polyvinylidene fluoride (PVDF) combines the advantages of fluorinated compound and polymeric resins, exhibit excellent mechanical properties, chemical corrosion resistance, high temperature resistance and good electrolyte wettability [5,6]. For instance, the melting point of PVDF is about 160 °C and can be used in the temperature range of − 40 ~ 150 °C.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Fluorinated Polyimide/Polyvinylidene Fluoride Composite Membranes with High Thermal Stability for Lithium Ion Battery Separator

Zhang

et al. 2021

Adv. Fiber Mater.

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The separator with excellent mechanical and thermal properties are highly required for lithium ion batteries (LIBs). Therefore, it is crucial to develop novel nanofibrous membranes with enhanced mechanical strength and thermal stability. In this work, the fluorinated polyimide (FPI) was synthesized and blended with polyvinylidene fluoride (PVDF) to fabricate composite nanofibrous membranes (CNMs) via electrospinning method. Benefiting from the introduction of aromatic FPI, the prepared PVDF/FPI nanofibrous membranes were endowed with enhanced mechanical strength and thermal stability. When the FPI content increased from 0 to 30 wt%, the tensile strength of composite nanofibrous membranes enhanced from 1.57 to 2.30 MPa. Moreover, there are almost no dimensional shrinkage for the CNM-30 containing 30 wt% FPI after heat treatment at 160 °C for 1 h. Furthermore, the prepared CNMs show improved electrochemical performances in comparison with neat PVDF and commercial Celgard membranes. The electrolyte uptake and ionic conductivity of the CNMs could reach to 522.4% and 1.14 ms•cm −1 , respectively. The prepared CNMs could provide an innovative and promising approach for the development and design of high-performance separators.

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“…%). 54 10 wt.% of PVDF was found to be the ideal concentration in the separator. Though the separator displayed a highly wrinkled network architecture, it favoured large contact between electrode/ electrolyte and rapid diffusion of electrolyte ions with minimum risk of a short circuit.…”

Section: Polymer Based Membranesmentioning

confidence: 93%

“…Coaxial wet spinning is one such process which was used to fabricate PVDF nanofiber separators whose thickness was controlled by regulating the PVDF content (5 wt% to 30 wt%). 54 10 wt% of PVDF was found to be the ideal concentration in the separator. Though the separator displayed a highly wrinkled network architecture, it favoured a large contact between the electrode/electrolyte and rapid diffusion of electrolyte ions with a minimum risk of a short circuit.…”

Section: Materials For Separator Membranesmentioning

confidence: 94%

Advances in materials and fabrication of separators in supercapacitors

2022

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Wet-spun PVDF nanofiber separator for direct fabrication of coaxial fiber-shaped supercapacitors

Cited by 63 publications

References 36 publications

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes

Electrospun Fluorinated Polyimide/Polyvinylidene Fluoride Composite Membranes with High Thermal Stability for Lithium Ion Battery Separator

Advances in materials and fabrication of separators in supercapacitors

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Wet-spun PVDF nanofiber separator for direct fabrication of coaxial fiber-shaped supercapacitors

Cited by 63 publications

References 36 publications

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO2 Composite Electrodes

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO2 Composite Electrodes

Electrospun Fluorinated Polyimide/Polyvinylidene Fluoride Composite Membranes with High Thermal Stability for Lithium Ion Battery Separator

Advances in materials and fabrication of separators in supercapacitors

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Product

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High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes

High-Performance Flexible Asymmetric Fiber-Shaped Supercapacitor Based on CF/PPy and CNT/MnO₂ Composite Electrodes