鞣花酸/FeIII低聚体构建纳米碳材料涂层及其应用

Construction of nanocarbon material coatings with ellagic acid/FeIII oligomers and their applications

关键词:  鞣花酸  FeIII低聚体  纳米碳材料  涂层  锂电池负极

Key Words:ellagic acid  FeIII oligomers  nanocarbon materials  coatings  lithium battery anodes

摘要:本研究以鞣花酸(EA)和FeIII离子为原料,通过配位作用构建鞣花酸/FeIII低聚体,并利用π-π堆积作用与纳米碳材料(石墨烯、碳纳米管)结合,制备了水相稳定的功能性纳米碳材料分散液。通过调节pH值和鞣花酸浓度,系统研究了分散液的粒径分布、Zeta电位及微观形貌,并将其应用于壳聚糖水凝胶涂层和锂电池负极材料。结果表明,鞣花酸/FeIII低聚体通过配位作用和空间位阻效应显著改善了纳米碳材料的分散性,其涂层表现出优异的导电性(1.57×10-1 S/m)和压阻响应特性,且作为锂电池负极时比容量可达26.75 F/g,为纳米碳材料在多功能涂层和能源存储领域的应用提供了新策略。

Abstract:In this study, ellagic acid (EA) and FeIII ions were used as raw materials to construct ellagic acid/FeIII oligomers through coordination interactions. These oligomers were combined with nanocarbon materials (graphene, carbon nanotubes) via π-π stacking interactions to prepare aqueous-phase stable functional nanocarbon material dispersions. By adjusting the pH value and ellagic acid concentration, the particle size distribution, Zeta potential, and microstructure of the dispersions were systematically investigated, and the dispersions were applied to chitosan hydrogel coatings and lithium battery anode materials. The results show that the ellagic acid/FeIII oligomers significantly improve the dispersibility of nanocarbon materials through coordination interactions and steric hindrance effects. The coatings exhibit excellent electrical conductivity (1.57×10-1 S/m) and piezoresistive response characteristics. When used as lithium battery anodes, the specific capacitance can reach 26.75 F/g. This study provides a new strategy for the application of nanocarbon materials in multifunctional coatings and energy storage fields.