High-field antiferroelectric behaviour and minimized energy loss in poly(vinylidene-co-trifluoroethylene)-graft-poly(ethyl methacrylate) for energy storage application

Li, Junjie; Tan, Shaobo; Ding, Shujiang; Li, Huayi; Yang, Lanjun; Zhang, Zhicheng

doi:10.1039/c2jm35532a

Cited by 120 publications

(76 citation statements)

References 38 publications

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“…[ 3 ] In the case of AFE PVDF-based fi lms, an ESD value of ≈14 J cm −3 has been reported with a higher effi ciency of ≈70%. [ 12 ] 3D nanostructures, such as nanoholes or nanotrenches, would be needed to eventually contain an even higher ESD for practical use in electric vehicles. [ 5 ] However, both PZT-and PVDF-based materials are inappropriate for such nanostructures because they are too thick (thickness ( t f ) ≈ 10 2 -10 4 nm) to be incorporated into nanoscale structures.…”

mentioning

confidence: 99%

Thin Hf_xZr_1‐xO₂ Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability

Park

Kim

et al. 2014

Advanced Energy Materials

316

204

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still smaller than that of electrochemical capacitors due mainly to the use of the low dielectric constant ( ε r ) Al 2 O 3 thin fi lm as the dielectric layer ( ε r ≈ 9). The concurrent high-power capacitors are made mainly of linear dielectric polymers with an ESD of ≈1-2 J cm −3 . [ 3 ] Although the ε r values of linear dielectric polymers are generally small (≈2-5), their electric breakdown fi elds are quite high, thereby allowing the application of high voltages, which result in a relatively high ESD. [ 3 ] Nonetheless, their ESD values are not high enough, so many other materials have been studied for the purpose. Most previous research on this topic focused on AFE Pb(Zr,Ti)O 3 (PZT)-based fi lms because their ESD values are as large as ≈1 and ≈10-15 J cm −3 for bulk and thin fi lms, respectively. [ 3 ] An ESD value as high as ≈50 J cm −3 has been reported for thin PZT-based fi lms when a large ≈3.5 MV cm −1 electric fi eld was applied. [ 7,8 ] However, such a high electric fi eld may induce a signifi cant reliability concern for PZT fi lms. [ 9 ] In addition, the commercial use of PZT is restricted in many countries due to its environmental impact. Another signifi cant problem with PZT thin fi lms is the decrease in their ESD value by ≈20-40% when their operating temperature increases to 150 °C. [ 10,11 ] Other candidate materials are FE poly(vinylidenefl uoride) (PVDF)-based materials, which can have a large breakdown fi eld and maximum polarization. The highest ESD value of FE PVDF-based fi lms has been reported to be as high as ≈20 J cm −3 when a ≈8 MV cm −1 electric fi eld was applied. [ 3 ] However, the problem with such fi lms is that their ESD is only ≈40% of their total stored energy because PVDF is an FE material meaning that ≈60% of the total stored energy is retained in the material. The presence of remanent polarization ( P r ) prohibits the full discharge of the stored charges in any FE material. [ 3 ] In the case of AFE PVDF-based fi lms, an ESD value of ≈14 J cm −3 has been reported with a higher effi ciency of ≈70%. [ 12 ] 3D nanostructures, such as nanoholes or nanotrenches, would be needed to eventually contain an even higher ESD for practical use in electric vehicles. [ 5 ] However, both PZT-and PVDF-based materials are inappropriate for such nanostructures because they are too thick (thickness ( t f ) ≈ 10 2 -10 4 nm) to be incorporated into nanoscale structures. Therefore, a dielectric material that has an ESD value as high as that of PZT and PVDF with a high breakdown fi eld at a fi lm thickness of less than ≈10 nm must be found. The fi lm must also be well grown using the facile atomic layer deposition (ALD) technique to ensure fl uent step coverage with atomic accuracy in thickness control.FE and AFE HfO 2 -based thin fi lms with various dopants, such as Si, Al, and Zr, were recently reported, where the conventional Useful energy sources and ways to effi ciently distribute energy have been extensively studied. With the development of new energy generation and handling technologies, h...

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mentioning

confidence: 99%

Thin Hf_xZr_1‐xO₂ Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability

Park

Kim

et al. 2014

Advanced Energy Materials

316

204

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“…These results prove successful graft polymerization via ATRP through the chlorine atoms on pristine P (VDF‐ co ‐CTFE) chains. The thermal initiation of the 2VP monomer might occur when P (VDF‐co‐CTFE) is used as the ATRP initiator . However, the P2VP homopolymers were completely eliminated during precipitation process in methanol that is a good solvent for P2VP …”

Section: Resultsmentioning

confidence: 99%

P (VDF‐co‐CTFE)‐g‐P2VP amphiphilic graft copolymers: Synthesis, structure, and permeation properties

Park

Kim

Ryu

et al. 2019

Polymers for Advanced Techs

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A series of amphiphilic graft copolymers of poly (vinylidene fluoride‐co‐chlorotrifluoroethylene)‐g‐poly(2‐vinyl pyridine), P (VDF‐co‐CTFE)‐g‐P2VP, with different degrees of P2VP grafting (from 26.3 to 45.6 wt%) was synthesized via one‐pot atom transfer radical polymerization (ATRP). The amphiphilic properties of P (VDF‐co‐CTFE)‐g‐P2VP graft copolymers allowed itself to self‐assemble into nanoscale structures. P (VDF‐co‐CTFE)‐g‐P2VP graft copolymers were introduced into neat P (VDF‐co‐CTFE) as additives to form blending membranes. When two different solvents, N‐methyl‐2‐pyrrolidone (NMP) and dimethylformamide (DMF), were used, specific organized crystalline structures were observed only in the NMP systems. P (VDF‐co‐CTFE)‐g‐P2VP played a pivotal role in controlling the morphology and pore structure of membranes. The water flux of the membranes increased from 57.2 to 310.1 L m−2 h−1 bar−1 with an increase in the PVDF‐co‐CTFE‐g‐P2VP loading (from 0 to 30 wt%) due to increased porosity and hydrophilicity. The flux recovery ratio (FRR) increased from 67.03% to 87.18%, and the irreversible fouling (Rir) decreased from 32.97% to 12.82%. Moreover, the pure gas permeance of the membranes with respect to N2 was as high as 6.2 × 104 GPU (1 GPU = 10–6 cm3[STP]/[s cm2 cmHg]), indicating their possible use as a porous polymer support for gas separation applications.

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“…The peaks at 840 and 1278 cm -1 are assigned to the β phase of P(VDF HFP) [14][15][16] which overlap with the absorption of PMMA, so that they can not be used to quantify the content change of beta phase. Figure 2 shows the XRD spectra of biaxial oriented P(VDF HFP)/PMMA blend films.…”

Section: Structure Characterization Of Biaxially Oriented P (Vdf Hfp)mentioning

confidence: 99%

Structure change and energy storage property of poly(vinylidene fluoride-hexafluoropropylene)/poly (methyl methacrylate) blends

et al. 2015

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In this work, in order to reduce the energy loss induced by the ferroelectric P(VDF HFP) and improve energy storage property, a series of P(VDF HFP)/PMMA blend films were prepared via biaxially oriented technology. The results showed that the ratio of alpha crystal continuously decreased with the addi tion of PMMA, the ratio of beta crystal firstly increased, followed by a reduction with further rising the PMMA percentage. Though gamma ratio was small, it enhances steadily. With the addition of PMMA, it could be found out the disorder in crystal structure, the reduction in crystal size, and the drop in crystallinity of P(VDF HFP). The structure change improved the discharge efficiency and temperature stability. With the addition of PMMA, tanδ is enhanced more than 10°C, and the discharge energy efficiency improved from 45% of pure PVDF to 75% under 400 MV/m after modifying with PMMA. This improvement in the dis charge energy efficiency is thought due to the formation of new crystal γ 2b.

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High-field antiferroelectric behaviour and minimized energy loss in poly(vinylidene-co-trifluoroethylene)-graft-poly(ethyl methacrylate) for energy storage application

Cited by 120 publications

References 38 publications

Thin Hf_xZr_1‐xO₂ Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability

Thin Hf_xZr_1‐xO₂ Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability

P (VDF‐co‐CTFE)‐g‐P2VP amphiphilic graft copolymers: Synthesis, structure, and permeation properties

Structure change and energy storage property of poly(vinylidene fluoride-hexafluoropropylene)/poly (methyl methacrylate) blends

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High-field antiferroelectric behaviour and minimized energy loss in poly(vinylidene-co-trifluoroethylene)-graft-poly(ethyl methacrylate) for energy storage application

Cited by 120 publications

References 38 publications

Thin HfxZr1‐xO2 Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability

Thin HfxZr1‐xO2 Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability

P (VDF‐co‐CTFE)‐g‐P2VP amphiphilic graft copolymers: Synthesis, structure, and permeation properties

Structure change and energy storage property of poly(vinylidene fluoride-hexafluoropropylene)/poly (methyl methacrylate) blends

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Thin Hf_xZr_1‐xO₂ Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability

Thin Hf_xZr_1‐xO₂ Films: A New Lead‐Free System for Electrostatic Supercapacitors with Large Energy Storage Density and Robust Thermal Stability