文献类型：期刊文献

英文题名：In-situ growth of core-shell CoFe@CoFe2O4 nanoparticles on carbon aerogel for broadband electromagnetic wave absorption and thermal insulation

作者：Liu, Shuai[1];Li, Shu[1];Guo, Shaoli[1];Cui, Yan[2,3];Dai, Minghan[1];Wang, Zelin[1];Chen, Guoxiang[1]

机构：[1]Xian Shiyou Univ, Coll Sci, Xian 710065, Shaanxi, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai, Peoples R China

年份：2025

卷号：243

外文期刊名：CARBON

收录：;EI(收录号：20252818747903);WOS:【SCI-EXPANDED(收录号:WOS:001534628500001)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant No. 12004301) , the Natural Science Foundation of Shaanxi Province of China (Grant Nos.2025JC-YBMS-540) , the Shaanxi Fundamental Science Research Project for Mathematics and Physics (Grant Nos. 22JSY001 and 23JSQ018) .

语种：英文

外文关键词：Electromagnetic wave absorption; Carbon aerogel; First-principle calculations; Thermal insulation

摘要：The composite engineering of dielectric-magnetic systems has demonstrated significant potential for enhancing the electromagnetic wave absorption (EWA). Despite advances, achieving uniform in-situ growth of highly dispersed magnetic particles on carbon matrices remains technologically challenging. This study proposes an integrated freeze-drying and carbonization strategy, successfully fabricating CoFe@CoFe2O4/C aerogel, featuring carbon nanosheets uniformly decorated with in-situ grown core-shell magnetic particles. The carbon aerogel annealed at 700 degrees C exhibits exceptional impedance matching and EWA characteristics, achieving an ultrawide effective absorption bandwidth of 7.84 GHz (10.16-18 GHz) at an optimized thickness of 2.63 mm. The outstanding absorption performance is attributed to the electromagnetic coupling between core-shell magnetic architectures and conductive carbon networks. First-principle calculations reveal dielectric polarization loss arising from interfacial heterogeneities and defect engineering in aerogels. Simultaneously, the hierarchical porosity endows the aerogel with superior thermal insulation. These integrated attributes position the aerogel as a multifunctional platform for EWA applications and advanced radar-infrared compatible stealth systems.