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Qi, Yinghao, et al. Composites Part A: Applied Science and Manufacturing 177 (2024): 107947.
Graphite fluoride has emerged as a multifunctional additive for enhancing the performance of conductive polymer-matrix composites (CPCs) used in overcurrent protection devices. In this study, graphite fluoride with varying degrees of fluorination was incorporated into carbon black (CB)/poly(vinylidene fluoride) (PVDF) systems to address limitations in positive temperature coefficient (PTC) intensity and voltage breakdown strength.
The resulting graphite fluoride-doped CPCs exhibited significantly improved electrical insulation, PTC effects, and voltage resistance. These improvements are attributed to the enhanced interfacial compatibility between CB and PVDF, which reduces filler migration and agglomeration under current or thermal stress. Particularly, graphite fluoride (C-F1.1) demonstrated superior effectiveness, acting as an electron-shielding agent that suppresses polymer degradation during high-current conditions.
Mechanistically, graphite fluoride strengthened the conductive network, decreased the interfacial layer thickness, and stabilized resistivity by restraining the movement of conduction particles. Additionally, its protective barrier function inhibited electrical, thermal, and chemical breakdowns, preserving the structural integrity of the CPCs during repeated overload cycles.
The optimized CPCs deliver enhanced reliability and self-regulation for high-voltage overcurrent protection applications and present a lightweight, reusable alternative to conventional fuses.
This product is used for the preparation of graphite fluoride-doped CPCs with improved PTC behavior and dielectric strength for advanced overcurrent protection device applications.
Wu, Banghui, et al. Journal of Power Sources 580 (2023): 233323.
Graphite fluoride has been successfully employed to prepare high-performance separator materials for stabilizing zinc anodes in aqueous zinc-ion batteries (AZIBs). In this study, graphite fluoride nanoflakes (GFNs) were dispersed in N-methylpyrrolidone (NMP) and combined with poly(vinylidene fluoride) (PVDF) to fabricate GFNs-PVDF@GF separators via vacuum filtration onto commercial glass fiber (GF) substrates.
The resulting GFNs-PVDF@GF separator exhibits high zinc affinity and strong electronegativity, enabling effective modulation of Zn²⁺ transport and suppression of SO₄²⁻ crossover. This dual regulation significantly mitigates dendrite growth and byproduct formation, two major challenges that impair Zn anode stability.
Electrochemical testing in Zn||Zn symmetric cells demonstrated remarkable long-term cycling stability-maintaining reversible performance for 1800 hours at 1 mA cm⁻² and over 900 hours at 5 mA cm⁻². In full Zn||MnO₂ cells, the modified separator enabled 92% capacity retention after 200 cycles at 1 A g⁻¹, highlighting its ability to promote uniform Zn deposition and suppress parasitic reactions.
These findings confirm that graphite fluoride is an effective functional additive for separator modification, offering a scalable and robust strategy to enhance the performance and safety of AZIBs.
This product is used for the preparation of functional separators to suppress dendrite growth and improve cycling stability in aqueous zinc-ion battery applications.
Ren, Li, et al. Chemical Engineering Journal 477 (2023): 147013.
Graphite fluoride (CF) has been successfully utilized as a fluorine-rich oxidizer in the preparation of high-energy Al/B/CF microspheres through an emulsion self-assembly method. Designed for energetic applications such as propellants and explosives, these microspheres integrate nano-aluminum (Al), boron (B), and CF to achieve significantly enhanced combustion behavior and energy output.
In the synthesis process, Al, B, and CF powders were dispersed in ethyl acetate containing a binder (F2602) to form the oil phase. Upon emulsification in an aqueous polyvinyl alcohol solution, uniform oil-in-water droplets were formed and transformed into microspheres through solvent evaporation and self-assembly. The resulting Al/B/CF microspheres, ranging from 60-600 μm, displayed a homogenous component distribution and porous structure.
Combustion tests revealed that CF content and Al/B mass ratio were critical to performance. Optimal results were obtained with 50 wt% CF and a 3:1 Al/B mass ratio, achieving a peak burning rate of 301.74 m/s and a pressurization rate of 77.78 MPa/s. These enhancements are attributed to a synergistic exothermic reaction between Al and B with CF, in which fluorine plays a key role in boosting reactivity and heat release.
This product is used for the preparation of Al/B/CF energetic microspheres to enhance combustion rate and energy density in advanced propellants and pyrotechnic formulations.
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