Towards inhibiting conductivity of Mo/PVDF composites through building MoO3 shell as an interlayer for enhanced dielectric properties

Peng, Wenqin; Zhou, Wenying; Li, Ting; Zhou, Juanjuan; Yao, Tian; Wu, Hongju; Zhao, Xin; Luo, Jianxun; Liu, Jiaxin; Zhang, Dongli

doi:10.1007/s10854-022-08393-5

Cited by 22 publications

(14 citation statements)

References 34 publications

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“…This can be also observed in Figure 5b discriminating the tan δ differences of six composites with 50 wt% filler loadings. The minuscule rise in tan δ is connected to the improved ɛ ′ under the equal filler loading, which coincides with the concept that high ɛ ′ is always accord with large loss 47 . In addition, as the amount of PS coating increases, the tan δ also undergoes corresponding changes, as observed in Figure 5f.…”

Section: Resultssupporting

confidence: 82%

“…The minuscule rise in tanδ is connected to the improved ϵ 0 under the equal filler loading, which coincides with the concept that high ϵ 0 is always accord with large loss. 47 In addition, as the amount of PS coating increases, the tanδ also undergoes corresponding changes, as observed in Figure 5f. This can be explained by the limitation effect of PS on charge carrier migration, which coincides with the change in ϵ 0 at same filler loading.…”

Section: Dielectric Propertiesmentioning

confidence: 71%

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Engineering of core@double‐shell structured Zn@ZnO@PS particles in poly(vinylidene fluoride) composites towards significantly enhanced dielectric performances

Yao

Zhou

Cao

et al. 2023

J of Applied Polymer Sci

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Polymeric dielectrics with high dielectric permittivity (ɛ′) and low loss have momentous applications in energy storage devices. In this study, to concurrently improve the ɛ′ and restrain the loss of original Zn (Zinc)/poly(vinylidene fluoride, PVDF), the core@double‐shell structured Zn@ZnO(zinc oxide)@PS(polystyrene) particles were prepared and composited with the PVDF. The impacts of the dual shells on the dielectric properties and polarization mechanism of composites were explored by fitting the experimental data with a Havriliak–Negami (H–N) equation. The Zn@ZnO@PS/PVDF exhibit remarkably higher ɛ′ in comparison to the raw Zn and Zn@ZnO fillers owing to the induced multiple polarizations originating from the combined contributions of the α relaxation of PVDF, slow interparticle polarization and fast intraparticle polarization. More importantly, the ɛ′ of the composites remarkably increases with the PS shell’ thickness, while the loss is still kept at rather low levels owing to the PS shell’ barrier effect on long‐range charges migration. So, the introduction of the PS shell synchronously promotes both the interparticle and intraparticle polarizations in the Zn@ZnO@PS/PVDF composites toward enhanced dielectric properties. The developed strategy opens a novel path to the design and fabrication of polymer composites with desirable dielectric performances for applications in electronics and electrical industry.

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Section: Resultssupporting

confidence: 82%

Section: Dielectric Propertiesmentioning

confidence: 71%

Engineering of core@double‐shell structured Zn@ZnO@PS particles in poly(vinylidene fluoride) composites towards significantly enhanced dielectric performances

Yao

Zhou

Cao

et al. 2023

J of Applied Polymer Sci

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“…In order to analyze the content of GN, TG experiment of LVO/GN composite was conducted ( Figure 3 b). From room temperature to 350 °C, the weight loss is 5% which is due to the evaporation of free water on the sample’s surface [ 25 , 26 , 27 ]. From 350 °C to 700 °C, the weight loss is 11.2% which is the reaction of GN to CO 2 .…”

Section: Resultsmentioning

confidence: 99%

Lithium Vanadium Oxide/Graphene Composite as a Promising Anode for Lithium-Ion Batteries

et al. 2022

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Lithium vanadium oxide (Li3VO4, LVO) is a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical capacity (394 mAh g−1) and safe working potential (0.5–1.0 V vs. Li+/Li). However, its electrical conductivity is low which leads to poor electrochemical performance. Graphene (GN) shows excellent electrical conductivity and high specific surface area, holding great promise in improving the electrochemical performance of electrode materials for LIBs. In this paper, LVO was prepared by different methods. SEM results showed the obtained LVO by sol-gel method possesses uniform nanoparticle morphology. Next, LVO/GN composite was synthesized by sol-gel method. The flexible GN could improve the distribution of LVO, forming a high conductive network. Thus, the LVO/GN composite showed outstanding cycling performance and rate performance. The LVO/GN composite can provide a high initial capacity of 350.2 mAh g−1 at 0.5 C. After 200 cycles, the capacity of LVO/GN composite remains 86.8%. When the current density increased from 0.2 C to 2 C, the capacity of LVO/GN composite only reduced from 360.4 mAh g−1 to 250.4 mAh g−1, demonstrating an excellent performance rate.

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“…The design of novel anode materials with excellent performance and low cost can accelerate the commercialization of sodium-ion batteries [ 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ]. Among the many anode electrode materials of sodium-ion batteries, hard carbon materials have the superiority of high capacity, low price, and low working voltage, and their unique structure is conducive to sodium-ion adsorption and reversible embedding/removal, showing excellent sodium storage performance, making them the most likely anode materials to be commercialized [ 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ]. When commercializing hard carbon materials, troubles such as low first-cycle coulombic efficiency, terrible rate performance, and poor cycle stability are also faced [ 58 , 59 , 60 ].…”

Section: Introductionmentioning

confidence: 99%

The Progress of Hard Carbon as an Anode Material in Sodium-Ion Batteries

et al. 2023

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When compared to expensive lithium metal, the metal sodium resources on Earth are abundant and evenly distributed. Therefore, low-cost sodium-ion batteries are expected to replace lithium-ion batteries and become the most likely energy storage system for large-scale applications. Among the many anode materials for sodium-ion batteries, hard carbon has obvious advantages and great commercial potential. In this review, the adsorption behavior of sodium ions at the active sites on the surface of hard carbon, the process of entering the graphite lamellar, and their sequence in the discharge process are analyzed. The controversial storage mechanism of sodium ions is discussed, and four storage mechanisms for sodium ions are summarized. Not only is the storage mechanism of sodium ions (in hard carbon) analyzed in depth, but also the relationships between their morphology and structure regulation and between heteroatom doping and electrolyte optimization are further discussed, as well as the electrochemical performance of hard carbon anodes in sodium-ion batteries. It is expected that the sodium-ion batteries with hard carbon anodes will have excellent electrochemical performance, and lower costs will be required for large-scale energy storage systems.

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Towards inhibiting conductivity of Mo/PVDF composites through building MoO3 shell as an interlayer for enhanced dielectric properties

Cited by 22 publications

References 34 publications

Engineering of core@double‐shell structured Zn@ZnO@PS particles in poly(vinylidene fluoride) composites towards significantly enhanced dielectric performances

Engineering of core@double‐shell structured Zn@ZnO@PS particles in poly(vinylidene fluoride) composites towards significantly enhanced dielectric performances

Lithium Vanadium Oxide/Graphene Composite as a Promising Anode for Lithium-Ion Batteries

The Progress of Hard Carbon as an Anode Material in Sodium-Ion Batteries

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