Synthesis and application of additives based on trifluoroethoxy-cyclo-phosphazene into polymer nanofibers

Kopecká, Radka; Alberti, Milan; Příhoda, Jıří; Voráč, Zbyněk; Zárybnická, Lucie

doi:10.1016/j.tet.2020.130999

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Structures of four NP sheets and their lattice parameters are labeled in Figure e–h. The N–P bond lengths in these structures from 1.70 to 2.00 Å are larger than those in polyphosphazene chain polymers and molecular structures (1.50–1.60 Å). − It is because of the different bonding ways and additional attraction along another directions in plane in contrast to polymers and molecular structures.…”

Section: Structures and Calculation Methodsmentioning

confidence: 92%

Long Radiation Lifetime and Quasi-Isotropic Excitons in Antioxidant V–V Binary Phosphorene Allotropes with Intrinsic Dipole

et al. 2020

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Two-dimensional (2D) V−V binary materials are gaining extensive attention because of high carrier mobility, largely tunable optical exciton properties, and high sensitivity to optical excitation. However, the luminescence efficiency and the radiation lifetime of black phosphorus are limited because of the high anisotropy feature of excitons. In addition, the effect of intrinsic dipole on the exciton behavior in these materials has yet to be explored. In the present work, the excitonic properties of α-, β-, γ-, and δ-phase 2D V−V nitrogen−phosphorus binary allotropes are explored using the Bethe−Salpeter equations combined with G 0 W 0 approximation systematically. The nitrogen substitution leads to the significantly modified electronic properties, including the increased oxidation activation energy from 0.03 to 0.40 eV, the enlarged band gap and direct-to-indirect band structure. It also leads to the reduced anisotropy but the opposite excitonic behavior due to the different introduction of intrinsic dipole between the α and β phases, including the brightness, radiation lifetime, effective mass, and real-space distribution. Because of high stability, long lifetime, and highly localized exciton states, the V−V binary materials with various phases have wide potentials for multifunctional and integrated applications.

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Section: Structures and Calculation Methodsmentioning

confidence: 92%

Long Radiation Lifetime and Quasi-Isotropic Excitons in Antioxidant V–V Binary Phosphorene Allotropes with Intrinsic Dipole

et al. 2020

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“…[13,17] Phosphazenes are inorganic compounds containing P = N bonds. They can be used as a polymerization catalyst, [18,19] in solar cells, [20] to produce polymer nanofibers [21] or in the manufacture of epoxy resin. [22][23][24] They have attracted some interest mainly as electrolytic additives, notably for polymer electrolytes and, to a lesser extent, as binders.…”

Section: Introductionmentioning

confidence: 99%

Deep and Comprehensive Study on the Impact of Different Phosphazene‐Based Flame‐Retardant Additives on Electrolyte Properties, Performance, and Durability of High‐Voltage LMNO‐Based Lithium‐Ion Batteries

et al. 2023

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Herein, the formulation of safe electrolytes for Li‐ion batteries based on phosphazene as a flame‐retardant (FR) is achieved. Three molecules are studied: hexafluorocyclotriphosphazene (FR1), (ethoxy)pentafluorocyclotriphosphazene (FR2), and pentafluoro(phenoxy)cyclotriphosphazene (FR3). By using a conventional electrolyte (LiPF6 salt in an ethylene carbonate/diethyl carbonate solvents mixture), FR's minimum percentages are defined to quantify their efficiency as FRs. Fluoroethylene carbonate is also added to the electrolyte (2 wt%). The surface tensions, vapor pressures, and transport properties of formulated electrolytes are measured to highlight the impact of the FR additives. Then, these electrolytes are tested in half and full electrochemical devices: Li|LiMn1.5Ni0.5O4 (LMNO) and graphite|LMNO between C/10 and C/2 at 20 °C. Flammability tests show that 3% of FR1, 5% of FR2, or 15% of FR3 are needed to make the electrolytes nonflammable. The transport properties of electrolytes based on FR1 and FR2 remain unchanged compared to the conventional electrolyte. Finally, the graphite|LMNO devices lose only 5% of the initial capacity after 100 cycles with the electrolytes based on FR1 and FR2, hence, confirming the latter's potential as an efficient FR for high‐voltage Li‐ion batteries.

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Phosphazenes

Chakraborty¹,

Ahmed²,

Chandrasekhar³

2022

Organophosphorus Chemistry

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Phosphazenes are compounds containing the [P═N] motif. Three broad classes of compounds fall in this category: (a) acyclic phosphazenes, also known as iminophosphoranes, (b) cyclophosphazenes and (c) polyphosphazenes. There has been a growing tendency in the literature to bunch all polymeric compounds containing the phosphazene motif in the category of polyphosphazenes. While we would be dealing all polymeric compounds in the subsection on polyphosphazenes, the distinction between the various types needs to be appreciated. Polyphosphazenes are those that contain a [P═N] backbone with substituents on phosphorus. Other forms of polymers could be regarded as hybrid polymers which often contain an organic backbone with phosphazene pendant groups or cross-linked polymers containing interconnected cyclophosphazene units. This chapter summarizes the literature on phosphazenes that was published in the calendar year 2020.

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Synthesis and application of additives based on trifluoroethoxy-cyclo-phosphazene into polymer nanofibers

Cited by 3 publications

References 35 publications

Long Radiation Lifetime and Quasi-Isotropic Excitons in Antioxidant V–V Binary Phosphorene Allotropes with Intrinsic Dipole

Long Radiation Lifetime and Quasi-Isotropic Excitons in Antioxidant V–V Binary Phosphorene Allotropes with Intrinsic Dipole

Deep and Comprehensive Study on the Impact of Different Phosphazene‐Based Flame‐Retardant Additives on Electrolyte Properties, Performance, and Durability of High‐Voltage LMNO‐Based Lithium‐Ion Batteries

Phosphazenes

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