Sulfur-Rich Polymers

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This invention relates to sulfur-rich polymers synthesized using specially designed linker molecules (hexaallyl melem and/or hexaallyl melamine), which are cross-linked with sulfur to form highly stable, conductive materials. These polymers can serve as active components in batteries (notably lithium-sulfur and sodium-sulfur batteries), as well as effective adsorbents for gas cleaning and metal ion removal from liquids. The innovation lies in the high sulfur content and the way sulfur is covalently bonded in the polymer network, enhancing stability, conductivity, and processing.

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• Cathode materials for advanced batteries such as lithium-sulfur and sodium-sulfur rechargeable batteries to improve energy density and lifecycle performance.
• Adsorbent materials for removing heavy metals like mercury from contaminated water or soil.
• Gas purification, especially for binding and removing gases such as iodine from air or industrial streams.
• Industrial separation processes involving gas separation and selective adsorption.
• Coatings for electrodes or as functional layers in composite materials for energy or environmental applications.

BenefitsContent extracted from patent full text and abstract with AI.

• High sulfur content enables greater energy density and capacity compared to traditional cathode materials.
• Sulfur is covalently bound in the polymer matrix, preventing the 'shuttle effect' and reducing capacity loss in batteries.
• Polymers are solid, thermally stable, and easy to process, unlike more waxy or poorly cross-linked materials.
• High nitrogen content in the molecular structure promotes effective binding of metal ions, increasing efficiency in metal removal.
• Synthesis does not require solvents or protective gas atmospheres, potentially lowering manufacturing costs and environmental impact.
• Formation of stable polymers without needing additional catalysts simplifies production and reduces impurities.
• Versatility in formulating copolymers and composites enables customization for different application fields (energy storage, adsorbents, coatings, etc.).
• Polymers have high surface area when treated appropriately, enhancing adsorption capabilities.

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Patent Abstract

The invention relates to sulfur-rich polymers prepared from sulfur-crosslinked linker molecules of the formula (I) (hexaallyl melem) and/or (II) (hexaallyl melamine) and to polymer blends and composites containing same, and to a method for preparing same and to their use. The invention discloses the use of the linker molecules of formula (I) and/or (II) for preparing the sulfur-rich polymers. The invention also relates to a polymer linker according to formula (I).