4 results about "Poly(phosphazene)" patented technology

This invention discloses a PP-based battery cell lead terminal material containing modified insulating and thermally conductive filler and its preparation method, relating to the field of polymer composite materials technology. The material comprises polypropylene, modified thermally conductive and insulating filler, thermal stabilizer, plasticizer, antioxidant, and lubricant. The modified thermally conductive and insulating filler consists of a point-sheet-wire synergistic thermally conductive framework composed of spherical α-alumina, hydroxylated hexagonal boron nitride nanosheets, and silicon nitride whiskers, sequentially forming a polydopamine anchoring layer, a magnesium-aluminum layered double hydroxide insulating locking layer, a polyphosphazene-siloxane-POSS composite shell, and a maleic anhydride-grafted polypropylene wax compatible coating layer. The resulting material possesses thermal conductivity, insulation, flame retardancy, heat resistance, mechanical stability, and processing performance, making it suitable for battery cell lead terminals and their surrounding insulating and thermally conductive structural components.

This invention provides a battery cell, its preparation method, and its application. The battery cell includes a composite separator, which comprises a base film and a flame-retardant functional layer. The raw materials for the flame-retardant functional layer include functionalized polyphosphazene monomers, multifunctional crosslinking agents, photoinitiators, and optional functional additives. The functionalized polyphosphazene monomers include a chlorophosphazene backbone and substituents bonded to the backbone. The first substituent includes an aliphatic group containing unsaturated double bonds, and the second substituent includes an aromatic oxy group and / or a fluoroalkoxy group. This invention constructs a UV-cured crosslinked polyphosphazene flame-retardant functional layer on the separator surface. Under normal operating temperatures, it acts as an inert functional coating and does not affect the battery's electrochemical performance. However, under thermal runaway conditions, it undergoes thermal decomposition, releasing phosphorus-containing active species into the gas phase. This releases key free radicals in the combustion chain reaction, thereby implementing flame suppression at the chemical level and significantly improving the battery's safety margin under thermal runaway scenarios.

This invention belongs to the field of energy storage materials technology and discloses a method for preparing an asymmetric coordinated iron single-atom catalyst. Addressing the problems of severe polyiodide shuttle effect, slow iodine conversion kinetics, and insufficient catalytic performance of traditional single-atom catalysts in existing zinc-iodine batteries, this invention uses polystyrene as a template, modifies and coats it with dopamine, and uses FeCl3, thiourea, and hexachlorotriphosphazene as precursors for Fe, S, and P, respectively, successfully preparing a PS@PDA-FeSP precursor. Subsequently, a template-assisted high-temperature decomposition method is used to obtain an asymmetric coordinated iron single-atom catalyst. Results show that zinc-iodine batteries assembled using this catalyst exhibit high specific capacitance and excellent cycle stability. Furthermore, the preparation process is safe, non-toxic, and low-cost, demonstrating promising application prospects.