Preparation and Electrochemical Performance of PVdF Ultrafine Porous Fiber Separator-Cum-Electrolyte for Supercapacitor

He, Tieshi; Jia, Rui; Lang, Xiaoshi; Wu, Xianyan; Wang, Youjiang

doi:10.1149/2.0631713jes

Cited by 38 publications

(17 citation statements)

References 24 publications

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“…3a,b. They show the presence of siloxene-PVDF fibers with a width of 50 nm with porous structures, which is an essential design consideration for iontransportation channels in supercapacitors 28 . The elemental mapping and EDS spectrum ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Probing the energy conversion process in piezoelectric-driven electrochemical self-charging supercapacitor power cell using piezoelectrochemical spectroscopy

et al. 2020

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The design and development of self-charging supercapacitor power cells are rapidly gaining interest due to their ability to convert and store energy in an integrated device. Here, we have demonstrated the fabrication of a self-charging supercapacitor using siloxene sheets as electrodes and siloxene-based polymeric piezofiber separator immobilized with an ionogel electrolyte. The self-charging properties of the fabricated device subjected to various levels of compressive forces showed their ability to self-charge up to a maximum of 207 mV. The mechanism of self-charging process in the fabricated device is discussed via "piezoelectrochemical effect" with the aid of piezoelectrochemical spectroscopy measurements. These studies revealed the direct evidence of the piezoelectrochemical phenomenon involved in the energy conversion and storage process in the fabricated device. This study can provide insight towards understanding the energy conversion process in self-charging supercapacitors, which is of significance considering the state of the art of piezoelectric driven self-charging supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Probing the energy conversion process in piezoelectric-driven electrochemical self-charging supercapacitor power cell using piezoelectrochemical spectroscopy

et al. 2020

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“…In some studies, different types of technologies are combined to prepare lithium-ion battery separators. He et al [69] prepared PVDF ultrafine porous separators with three dimensional network structure, supernal porosity and electrolyte absorption through combining electrospinning and phase separation processes, as shown in Figure 5A. The microstructure and modalism of PVDF separators are investigated via the scanning electron microscope (SEM), as shown in Figure 5B.…”

Section: Single Polymer Separatorsmentioning

confidence: 99%

Poly(vinylidene fluoride) separators for next‐generation lithium based batteries

et al. 2021

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Lithium-ion batteries (LIBs) have become star products in wireless electronic equipment, new energy vehicles and many other fields due to their advantages of high energy density, light weight, good stability, high charging-discharging efficiency, long service life and environmental friendliness. The separator is an indispensable part of batteries that does not participate in electrochemical reactions, separating the anode and cathode. It has a microporous structure, which can store electrolyte and allow ions to transfer freely. Poly(vinylidene fluoride) (PVDF)-based separators are characterized by strong polarity, high dielectric constant, stable electrochemical performance, excellent tensile properties and mechanical strength, favorable thermal stability and wettability. Therefore, they are proposed to be potential candidates for novel separators in the field of LIBs. This review introduces the recent researches and advances in PVDF-based separators for LIBs, with the characterizations and requirements for separators. It is mainly divided into the two types including monolayer and multilayer separators. Furthermore, the performance of the PVDF-based separators is summarized, and the challenges and prospects in their practical application are briefly analyzed.

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“…The EIS measurements were performed over the frequency range of 250 kHz -0.1 Hz with a voltage amplitude of 10 mV. The ionic conductivity of the electrolytes was characterized as described in the work of Huang et al 38 and He et al 39 by soaking a sample of the cotton (0.785 cm 2 , ~430 μm thick) in the electrolyte before housing between stainless steel electrodes within a Swagelok cell to perform the EIS measurement. The actual conductivity was calculated from equation 4.…”

Section: Characterizationmentioning

confidence: 99%

Acetonitrile-Free Organic Electrolyte for Textile Supercapacitor Applications

Hillier

Sheng

Cruden

et al. 2021

J. Electrochem. Soc.

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Textile supercapacitors are a key enabler of future, wireless, textile based smart wearables. With high power densities and long cycle lives, textile supercapacitors can be readily paired with energy harvesters to power the wearable technology. However, the energy density of these devices remains low (of the order of μWh) and work to increase this through improvements in the electrode design are requiring ever more complex materials and manufacturing processes. This work presents a novel and safe organic electrolyte that can increase the energy density of a simple symmetric activated carbon textile supercapacitor by ~ 8 times when compared to previous devices utilizing an identical substrate and set of electrodes. With a capacitance of 34.0 mF.cm -2 and an energy density of 18.9 μWh.cm -2 , this device showed excellent performance. The device also underwent a rarely seen test for calendar ageing and was found to still exhibit 48% capacitance retention after two months of calendar ageing. This novel electrolyte enables the production of high energy density electric double layer textile supercapacitors without the need for pseudocapacitve or battery-like electrode materials.

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Preparation and Electrochemical Performance of PVdF Ultrafine Porous Fiber Separator-Cum-Electrolyte for Supercapacitor

Cited by 38 publications

References 24 publications

Probing the energy conversion process in piezoelectric-driven electrochemical self-charging supercapacitor power cell using piezoelectrochemical spectroscopy

Probing the energy conversion process in piezoelectric-driven electrochemical self-charging supercapacitor power cell using piezoelectrochemical spectroscopy

Poly(vinylidene fluoride) separators for next‐generation lithium based batteries

Acetonitrile-Free Organic Electrolyte for Textile Supercapacitor Applications

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