Enhanced energy storage performance of all-organic sandwich structured dielectrics with FPE and P(VDF-HFP)

Zhang, Wenchao; Guan, Feng; Jiang, Min; Li, Yanpeng; Zhu, Congcong; Dong, Yue; Li, Jialong; Liu, Xiaoxu; Feng, Yu

doi:10.1016/j.compositesa.2022.107018

Cited by 37 publications

(20 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the 20% P(VDF-TrFE) blend film has a slightly higher E b and dielectric constant than those of the 16.7% blend film, its electric displacement under high electric field is much smaller (see Figure a), resulting in a less prominent value of U e . When comparing the result obtained in this study with the recent published work on all-organic dielectric films, − the blend films developed here with two common PVDF-based copolymer components in single layer show considerable superiority as summarized in Figure e.…”

Section: Resultssupporting

confidence: 59%

See 1 more Smart Citation

Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors

Xiao

Liu

Sun

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

High power density capacitors have been highly demanded in modern electronics and pulsed power systems. Yet the long-standing challenge that restricts achieving high power in capacitors lies in the inverse relationship between the breakdown strength and permittivity of dielectric materials. Here, we introduce poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) into the host poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) to produce PVDF-based copolymer blends, resulting in composition-driven 0–3 type microstructures, featuring nanospheres of P(VDF-TrFE) lamellar crystals dispersed homogeneously in a P(VDF-HFP) matrix together with crystalline phase evolution from the γ-phase to the α-phase. At the critical composition, the TrFE/HFP mole ratio is equal to 1, and the blend film achieves maximum energy storage performance with discharged energy density (U dis) ∼ 24.3 J/cm3 at 607 MV/m. Finite element analyses reveal the relationship between microstructures, compositions, and the distribution of local electric field and polarization, which provide an in-depth understanding of the microscopic mechanism of the enhancement in energy storage capability of the blend films. More importantly, in a practical charge/discharge circuit, the blend film could deliver an ultrahigh energy density of 20.4 J/cm3, i.e., 88.3% of the total stored energy to 20 kΩ load in 2.8 μs (τ0.9), resulting a high power density of 7.29 MW/cm3, outperforming the reported dielectric polymer-based composites and copolymer films in both energy and power densities. The study thus demonstrates a promising strategy to develop high-performance dielectrics for high power capacitors.

show abstract

Section: Resultssupporting

confidence: 59%

“…(d) Change of breakdown strength, discharged energy density, and charge–discharge efficiency with P(VDF-TrFE) volume fraction. (e) Comparison of the energy storage properties of this study with recent reported all-organic films from the literature. − …”

Section: Resultsmentioning

confidence: 94%

Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors

Xiao

Liu

Sun

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…5 The additional cooling system brings extra cost and bulk, depressing the working efficiency, and cannot meet the development of next-generation power devices, whose working ambient temperature exceeds 150 1C. 6 Therefore, several polymers with high glass transition temperatures (T g ), such as polyetheretherketone (PEEK), 7 fluorene polyester (FPE), 8 poly(arylene etherurea) (PEEU), 9 polyimide (PI) 10,11 and polyetherimide (PEI), 12,13 have been developed as a dielectric capacitor to meet the pressing requirement of hightemperature applications. It should be noted that these linear dielectric polymers lack spontaneous polarization and perform low dielectric constant.…”

Section: Introductionmentioning

confidence: 99%

Achieving high energy density at a low electric field of high-temperature sandwich-structured polymer dielectric composite by PVDF crystallinity regulation

et al. 2023

View full text Add to dashboard Cite

show abstract

“…[17][18][19] All-organic polymer dielectric materials exhibit superior dielectric strength and energy density due to the similarity of the components. 20 For example, the polar polymers with high ε r , such as poly(bis(4-cyanophenyl) 2-vinylterephthalate), 21 polyvinylidene fluoride (PVDF), 22 polysulfone, 23 and poly (arylene ether urea), 24 have been regarded as polar fillers to elevate the ε r and energy density of the non-polar polymers. However, all-organic composites with high ε r often need to be doped with a large number of polar polymers, resulting in the increase of the relaxation loss.…”

Section: Introductionmentioning

confidence: 99%

All organic polyimide‐based composite films with high intrinsic polarization for superior energy density and low dielectric loss

Wang

Yang

Lin

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

A simple and low-cost approach was proposed to fabricate poly(vinylidene fluoride) (PVDF) and polyimide-poly(amidic acid) (PI-PAA) all-organic hybrid films with excellent dielectric performance by solution casting and thermal imidization process. The results showed that the introduction of PVDF and PAA molecular chains into PI matrix significantly enhanced the dielectric permittivity and energy density of PI-based composites. The permittivity and energy density of 15 wt% PI-PAA/PVDF composites were 4.83 at 10 3 Hz and 5.55 J cm À3 , which were 52% and 107% higher than that of PI (3.18 at 10 3 Hz, 2.68 J cm À3 ). In addition, the dielectric loss of 15 wt% PI-PAA/PVDF composites was still maintained at a low level (0.009 at 10 3 Hz). The molecular dynamics results showed that the polarization strength of composites mainly originated from the intrinsic polarization strength. The intrinsic polarization strength of PI-PAA/PVDF in the composites was 10 10 times higher than interfacial polarization strength, and interfacial polarization was negligible. There was no significant difference between the self-diffusion coefficients of 15 wt% PI-PAA/PVDF and PI-PAA, indicating that the relaxation polarization of polymer molecular chains was suppressed. This work provides an effective way for the preparation of dielectric for all organic high voltage direct current system.

show abstract

Enhanced energy storage performance of all-organic sandwich structured dielectrics with FPE and P(VDF-HFP)

Cited by 37 publications

References 54 publications

Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors

Composition-Driven Polarization Distribution in Poly(vinylidene fluoride)-Based Copolymer Blends for High Power Density Capacitors

Achieving high energy density at a low electric field of high-temperature sandwich-structured polymer dielectric composite by PVDF crystallinity regulation

All organic polyimide‐based composite films with high intrinsic polarization for superior energy density and low dielectric loss

Contact Info

Product

Resources

About