Switching dynamics enhancement in P(VDF-TrFE) copolymer ultrathin films with symmetric organic film electrodes

Zhang, Xiuli; Liu, Changli; Li, Long; Yuan, Haidong; Xu, Hongyao

doi:10.1016/j.orgel.2018.12.017

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…Electrochemical supercapacitors have moderate energy density and power density, but they are characterized by complex structures, low operating currents, high leakage currents, and short cycle times, which restrict their wide applications in daily life [7]. Compared with batteries and electrochemical supercapacitors, dielectric capacitors have the advantages of high power density, a wide temperature range, a high charge-discharge rate, and long cycle times, despite their energy density being low [8][9][10]. As a result, increasing the energy-storage density of dielectric capacitors has became an important issue [11].…”

Section: Introductionmentioning

confidence: 99%

Improved dielectric properties and energy-storage densities of BaTiO₃-doped PVDF composites by heat treatment and surface modification of BaTiO₃

Sang¹,

Li²,

Zhang³

et al. 2022

J. Phys. D: Appl. Phys.

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The dielectric properties of barium titanate/polyvinylidene fluoride (BT/PVDF) composites are investigated. The doped BT particles are prepared by using simple heat treatment. It is found that 1000 ℃ is the optimal temperature for the doped BT particles to improve the dielectric properties of BT/PVDF composites. Besides, we also find that the breakdown strength of the BT/PVDF composites can be significantly enhanced when the surface of the doped BT particles are pre-modified with phthalic acid or KH550. In particular, the BT/PVDF composites doped with KH550 modified BT particles have the maximum energy storage density of 4.08 J/cm3, which is 81.33 % higher than that of BT/PVDF composites doped with BT particles and without any treatment. Therefore, we can conclude that heat treatment and surface modification of doped BT particles could become new approaches to enhance the energy storage performance of the BT/PVDF composites, which has a good application prospect in the field of dielectric energy storage materials.

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Section: Introductionmentioning

confidence: 99%

Improved dielectric properties and energy-storage densities of BaTiO₃-doped PVDF composites by heat treatment and surface modification of BaTiO₃

Sang¹,

Li²,

Zhang³

et al. 2022

J. Phys. D: Appl. Phys.

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“…For an ultrathin film, such as 5060 nm, its ferroelectric properties are strongly dependent on the interface layers [ 15 ]. For instance, it was found that an electroactive interlayer [ 16 , 17 ] between electrode and P(VDF–TrFE) interlayer can improve the performance of polymer memory devices. The fatigue properties of P(VDF–TrFE) thin films under 10 6 –10 7 switching cycles [ 18 , 19 ] have received considerable attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

The Influence Mechanism of Temperature and Storage Period on Polarization Properties of Poly (Vinylidene Fluoride–Trifluoroethylene) Ultrathin Films

Shi

Zhang

et al. 2021

Membranes

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The effect of testing temperature and storage period on the polarization fatigue properties of poly (vinylidene fluoride-trifluoroethylene) (P(VDF–TrFE)) ultrathin film devices were investigated. The experimental results show that, even after stored in air for 150 days, the relative remanent polarization (Pr/Pr(0)) of P(VDF–TrFE) of ultrathin films can keep at a relatively high level of 0.80 at 25 °C and 0.70 at 60 °C. To account for this result, a hydrogen fluoride (HF) formation inhibition mechanism was proposed, which correlated the testing temperature and the storage period with the microstructure of P(VDF–TrFE) molecular chain. Moreover, a theoretical model was constructed to describe the polarization fatigue evolution of P(VDF–TrFE) samples.

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Super Long‐Cycling All‐Solid‐State Battery with Thin Li₆PS₅Cl‐Based Electrolyte

Liu

Zhou

Han

et al. 2022

Advanced Energy Materials

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high interfacial impedance between SSEs and electrodes, and relatively high fabrication cost, which impede their applications. SSEs with high ionic conductivity, wide electrochemical window and low interfacial impedance are critical in developing ASSBs with high specific energy and power density. [2,3] Currently, among various SSEs, sulfide SSEs have a Li-ion conduction capability comparable to that of organic liquid electrolytes (≈10 -2 S cm -1 at room temperature). [4][5][6][7][8][9][10] Various sulfide materials with a high Li-ion conductivity of 10 -3 -10 -2 S cm -1 at room temperature, such as Li 10 GeP 2 S 12 (LGPS), [5] Li 10 SnP 2 S 12 , [6] and Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 , [7] have been investigated. Among them, a family of sulfide SSEs, lithium argyrodites Li 6 PS 5 X (X = Cl, Br), [8] are attracting more attention due to high Li-ion conductivity (e.g., Li 5.3 PS 4.3 ClBr 0.7 : 2.4 × 10 -2 S cm -1 ; [9] Li 6 PS 5 Cl (denoted as LPSCl): 3.15 × 10 -3 S cm -1 [10] ) and relatively good electrochemical compatibility. The ASSB cells using argyrodites have demonstrated good cycling and rate performance. For example, recently, a sandwiched SSE separator of LPSCl-LGPS-LPSCl has been designed to prevent the growth of Li dendrites and thus enable superior cycling performance of ASSB cells; [11] and LPSCl SSE has also been matched with the silicon anode, capable of operating with high current densities and achieving a long cycle. [12] One drawback of pressed sulfide SSE separator layers is that micro-cracks easily appear and expands during Li plating/stripping in sulfide electrolytes due to the rigidness of sulfide powders, leading to short circuit in ASSB cells. [13] Thus a thicker sulfide SSE layer (e.g., ≈0.5-1.2 mm) via pressing sulfide powder was usually used in laboratory-type cells to guarantee the long-term cycling performance of the ASSBs, [13a,b,14] but this way reduces the cell-level energy density and is detrimental to scalable fabrication. Thus, it is desired to prepare sulfide SSE membranes with a small thickness and compact structure for advanced ASSBs.To obtain a thin, free-standing sulfide SSE membrane, a soft polymeric component is often used. Recently, much progress in sulfide-polymer composite solid electrolytes (CSEs) has been made. [15][16][17][18] Among them, Luo et al. prepared a 65 µm-thick bendable sulfide SSE using LPSCl and poly(ethylene oxide) (PEO), [16] and their ASSB cell of LiNi 0.7 Co 0.2 Mn 0.1 O 2 (LiNi x Co y Mn 1-x-y O 2 , denoted as NCM)||CSE||lithium-indium All-solid-state batteries (ASSBs) using sulfide electrolytes have attracted everincreasing interest due to high ionic conductivity of the sulfides. Nevertheless, a thin, strong solid-state sulfide electrolyte membrane maintaining high ionic conductivity is highly desired for ASSBs. Here, a thin, flexible composite solid electrolyte membrane composed of argyrodite sulfide Li 6 PS 5 Cl and a polar poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) framework is prepared via an electrospinning-infil...

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Switching dynamics enhancement in P(VDF-TrFE) copolymer ultrathin films with symmetric organic film electrodes

Cited by 6 publications

References 27 publications

Improved dielectric properties and energy-storage densities of BaTiO₃-doped PVDF composites by heat treatment and surface modification of BaTiO₃

Improved dielectric properties and energy-storage densities of BaTiO₃-doped PVDF composites by heat treatment and surface modification of BaTiO₃

The Influence Mechanism of Temperature and Storage Period on Polarization Properties of Poly (Vinylidene Fluoride–Trifluoroethylene) Ultrathin Films

Super Long‐Cycling All‐Solid‐State Battery with Thin Li₆PS₅Cl‐Based Electrolyte

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Switching dynamics enhancement in P(VDF-TrFE) copolymer ultrathin films with symmetric organic film electrodes

Cited by 6 publications

References 27 publications

Improved dielectric properties and energy-storage densities of BaTiO3-doped PVDF composites by heat treatment and surface modification of BaTiO3

Improved dielectric properties and energy-storage densities of BaTiO3-doped PVDF composites by heat treatment and surface modification of BaTiO3

The Influence Mechanism of Temperature and Storage Period on Polarization Properties of Poly (Vinylidene Fluoride–Trifluoroethylene) Ultrathin Films

Super Long‐Cycling All‐Solid‐State Battery with Thin Li6PS5Cl‐Based Electrolyte

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Improved dielectric properties and energy-storage densities of BaTiO₃-doped PVDF composites by heat treatment and surface modification of BaTiO₃

Improved dielectric properties and energy-storage densities of BaTiO₃-doped PVDF composites by heat treatment and surface modification of BaTiO₃

Super Long‐Cycling All‐Solid‐State Battery with Thin Li₆PS₅Cl‐Based Electrolyte