Design and characterization of molecular, crystal and interfacial structures of PVDF-based dielectric nanocomposites for electric energy storage

Zhu, Na; Zhou, Ji‐Xun; Zhang, Lei; Ni, Yang; Dastan, Davoud; Zhang, Jian; Chen, Yingxin; Zhang, Xuefeng

doi:10.1039/d3sm00291h

Cited by 10 publications

(2 citation statements)

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“…Methods such as the selection of PVDF copolymers, solution casting of pristine PVDF, and incorporation of nanofillers have proven successful in promoting the electroactive (β and γ) phases of PVDF. [24][25][26] Interestingly, PVDF films that exhibit the γ phase and possess a dense microstructure have been observed to perform well in energy storage applications compared to other variations, underscoring the influence of phase and structure on the material's performance. [27][28][29] Song et al demonstrated higher performance in LFP cells with an increased β phase.…”

Section: Introductionmentioning

confidence: 99%

“…The electroactive β‐phase of PVDF has been reported to be induced by electrical poling and stretching of the polymer at high temperatures. Methods such as the selection of PVDF copolymers, solution casting of pristine PVDF, and incorporation of nanofillers have proven successful in promoting the electroactive (β and γ) phases of PVDF [24–26] …”

Section: Introductionmentioning

confidence: 99%

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Various Solvent‐Binder Compositions and their Crystalline Phase for Optimal Screen‐Printing of NMC Cathodes

Sliz,

Roy,

Molaiyan

et al. 2024

Batteries & Supercaps

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This research examines the compatibility and performance of various solvents and binders in the battery cathode fabrication. The study focused on the applicability of solvents, including DMF, NMP, p‐Xylene, Ethanol, Toluene, Cyrene, and KJCMPA, in conjunction with binders such as PVDF #9300, PVDF #1100, HSV 1810, PVP, Oppanol N150, and Oppanol B15 for NMC‐based slurry formulation. Each solvent‐binder combination was evaluated with NMC material, and those demonstrating optimal solubility, adhesion, and film quality were selected for cathode screen‐printing trials. Results show that the combination of NMP solvent and HSV 1810 binder outperformed other pairings in cycling stability and capacity retention, achieving 87% capacity retention after 1,000 1C/1C cycles. Comprehensive analyses using SEM, XRD, and FTIR offered insights into the structural and binder phase characteristics of the fabricated cathodes, especially the alterations in binder crystallinity phases (α, β, and γ). The data suggest that the use of the homopolymer HSV 1810, irrespective of the solvent, results in a pronounced presence of the γ‐phase within the binder, which subsequently improves battery performance. Moreover, the findings underscore the importance of the solvent‐binder combinations in enhancing battery performance and longevity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Various Solvent‐Binder Compositions and their Crystalline Phase for Optimal Screen‐Printing of NMC Cathodes

Sliz,

Roy,

Molaiyan

et al. 2024

Batteries & Supercaps

View full text Add to dashboard Cite

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Surface‐Confined Winding Assembly of SiO₂ on the Surface of BaTiO₃ Leading to Enhanced Performance of Dielectric Nanocomposites

Wang,

Luo,

Chen

et al. 2024

Adv Funct Materials

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In response to the demand for miniaturization and lightweighting in the electronics industry, achieving enhanced energy density of dielectrics is crucial. Constructing nanocomposites consist of ceramic fillers and polymer matrix is an effective strategy in this regard. To address the adverse coupling between polarization and breakdown strength of the nanocomposites, a series of BaTiO3@SiO2 nanofillers with customizable SiO2 shell coverage degrees (90°, 180°, and 360°) is designed and synthesized by surface‐confined winding assembly of SiO2 on the surface of BaTiO3. When a half area of BaTiO3 core is coated by SiO2 layer, it is defined as 180°. A larger coverage degree implies better reduction of leakage current injection, and more effective suppression of local electric field concentration. However, it also leads to a more pronounced reduction in the polarization. 180° BaTiO3@SiO2 demonstrates the most effective mitigation of the adverse coupling between polarization and breakdown strength in nanocomposites. The 180° BaTiO3@SiO2/Poly(vinylidene fluoride) (PVDF) nanocomposite achieves high breakdown strength while maintaining relatively higher polarization intensity, for example, the energy density reaches 20.64 J cm−3 at 650 MV m−1, which is 2.62 times of pure PVDF. This work reveals the growth mechanism of customizable SiO2 shell coverage degrees on BaTiO3 surfaces, providing an effective strategy for high‐performance dielectrics

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Reinforcing the characteristics of recyclable PVA/PVDF polymer blends via ZnO nanofiller

Saini,

Dhayal,

Leel

et al. 2024

Opt Quant Electron

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Design and characterization of molecular, crystal and interfacial structures of PVDF-based dielectric nanocomposites for electric energy storage

Abstract: PVDF-based polymers with polar covalent bonds are next-generation dielectric materials for electric energy storage applications. Several types of PVDF-based polymers, such as homopolymer, copolymers, terpolymers and tetrapolymers, were synthesized by...

Cited by 10 publications

References 172 publications

Various Solvent‐Binder Compositions and their Crystalline Phase for Optimal Screen‐Printing of NMC Cathodes

Various Solvent‐Binder Compositions and their Crystalline Phase for Optimal Screen‐Printing of NMC Cathodes

Surface‐Confined Winding Assembly of SiO₂ on the Surface of BaTiO₃ Leading to Enhanced Performance of Dielectric Nanocomposites

Reinforcing the characteristics of recyclable PVA/PVDF polymer blends via ZnO nanofiller

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Design and characterization of molecular, crystal and interfacial structures of PVDF-based dielectric nanocomposites for electric energy storage

Abstract: PVDF-based polymers with polar covalent bonds are next-generation dielectric materials for electric energy storage applications. Several types of PVDF-based polymers, such as homopolymer, copolymers, terpolymers and tetrapolymers, were synthesized by...

Cited by 10 publications

References 172 publications

Various Solvent‐Binder Compositions and their Crystalline Phase for Optimal Screen‐Printing of NMC Cathodes

Various Solvent‐Binder Compositions and their Crystalline Phase for Optimal Screen‐Printing of NMC Cathodes

Surface‐Confined Winding Assembly of SiO2 on the Surface of BaTiO3 Leading to Enhanced Performance of Dielectric Nanocomposites

Reinforcing the characteristics of recyclable PVA/PVDF polymer blends via ZnO nanofiller

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Surface‐Confined Winding Assembly of SiO₂ on the Surface of BaTiO₃ Leading to Enhanced Performance of Dielectric Nanocomposites