材料科学
金属
吸附
偶极子
碳纤维
吸收(声学)
多孔性
Atom(片上系统)
基质(化学分析)
极化(电化学)
热解
光电子学
化学工程
复合材料
化学
有机化学
物理化学
计算机科学
工程类
冶金
嵌入式系统
复合数
作者
Wenhuan Huang,Qiang Qiu,Xiufang Yang,Shouwei Zuo,Jianan Bai,Huabin Zhang,Ke Pei,Renchao Che
出处
期刊:Nano-micro Letters
[Springer Science+Business Media]
日期:2022-04-06
卷期号:14 (1)
被引量:88
标识
DOI:10.1007/s40820-022-00830-8
摘要
Improving the atom utilization of metals and clarifying the M-M' interaction is both greatly significant in assembling high-performance ultra-light electromagnetic wave-absorbing materials. Herein, a high-temperature explosion strategy has been successfully applied to assemble the hierarchical porous carbon sponge with Co-Fe decoration via the pyrolysis of the energetic metal organic framework. The as-constructed hybrid displays a superior reflection loss (RL) value of - 57.7 dB and a specific RL value of - 192 dB mg-1 mm-1 at 12.08 GHz with a layer thickness of 2.0 mm (loading of 15 wt%). The off-axis electron hologram characterizes the highly distributed numerous polarized nanodomain variable capacitors, demonstrating the dipole and interfacial polarization along the edges of the nanopores. More importantly, the X-ray absorption spectroscopy analysis verifies the mutual interaction between the metal cluster and carbon matrix and the electronic coupling responsible for the greatly improved electromagnetic wave absorption.
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