Fabrication of CeO2/Co/C composites for high-efficiency electromagnetic wave absorption

Mu, Meiqi; Yu, Jihong; Yao, Zhiqian; Xu, Suqiong; Rong, Chuicai; Zhang, Xianke; Xiong, Zuzhou; Wang, Xingquan; Li, Xiaokang; Yuan, Jüjun

doi:10.1016/j.jallcom.2023.170295

Cited by 6 publications

(1 citation statement)

References 62 publications

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“…23–27 Recently, we have successfully prepared ternary CeO 2 /Co/C composites using ZIF-67 as a precursor template, and when compared with Co/C and CeO 2 /C composites, CeO 2 /Co/C showed better electromagnetic MA characteristics with an RL min of −55.02 dB at 2.82 mm. 28 The introduction of magnetic metals can effectively solve the problem of poor impendence matching in single-component CeO 2 , thus improving the MA performance of magnetoelectric coupling systems. In addition to coordinating with magnetic materials for creating dielectric absorbers, a pyrolysis strategy can also be an effective means for improving the MA properties.…”

Section: Introductionmentioning

confidence: 99%

Co/CeO₂/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Yao,

Xu,

Zhang

et al. 2023

Dalton Trans.

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Section: Introductionmentioning

confidence: 99%

Co/CeO₂/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Yao,

Xu,

Zhang

et al. 2023

Dalton Trans.

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Heterostructured BN@Co‐C@C Endowing Polyester Composites Excellent Thermal Conductivity and Microwave Absorption at C Band

Zhong,

He,

Zhang

et al. 2024

Adv Funct Materials

104

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The trends of miniaturization, lightweight, and high integration in electronics have brought serious issues in heat dissipation and electromagnetic compatibility and also limited the simultaneous use of thermally conductive and microwave absorption materials. Therefore, it is imperative to design materials that possess those dual functions. In this work, one‐pot method is used to anchor zeolitic imidazolate framework ZIF‐67 coated with polydopamine (PDA) on boron nitride (BN) to obtain BN@ZIF‐67@PDA. The pyrolysis product BN@Co‐C@C is used as heterostructured thermally conductive/microwave absorption fillers and blended with polyethylene terephthalate (PET) to prepare BN@Co‐C@C/PET composites. When the mass ratio of BN to ZIF‐67@PDA is 7.5:1 and the mass fraction of BN7.5@Co‐C@C is 45 wt%, the BN7.5@Co‐C@C/PET composites exhibit excellent thermal conductivities and microwave absorption performances. The thermal conductivity coefficient is 5.37 W m−1 K−1, which is 35.8 times higher than that of PET (0.15 W m−1 K−1), and also higher than that of 45 wt% (BN7.5/Co‐C@C)/PET composites (4.03 W m−1 K−1) prepared by directly mixing. The minimum reflection loss of 45 wt% BN7.5@Co‐C@C/PET composites are −63.1 dB at 4.72 GHz, and the corresponding effective absorption bandwidth is 1.28 GHz (4.08–5.36 GHz), achieving excellent microwave absorption performance at C band.

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Hetero‐Interface Engineering on 9.0 wt% CoO_x‐Doped CeO₂ Nanorods as Electromagnetic Wave Absorber and Integrated into Multifunctional Aerogel

Huang,

Wang,

et al. 2024

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Ceria (CeO2) becomes a promising candidate as electromagnetic wave absorbing materials (EWAMs) for their abundant natural source, rich oxygen vacancy, charge conversion, and electron transfer abilities. However, it remains challenging to regulate its nanoscale and atom‐scale composition to optimize the absorbing performance and develop high‐performance commercial devices. Herein, a facile method to large‐scale synthesis CeO2@Co‐x% (x = 5, 7, 9, 11, 13) series EWAMs with diverse amounts of decorated CoOx is presented. By modulating the ratio of doped CoOx, a rational hetero‐interface is created in CeO2@Co‐9% to enhance natural and exchange resonances, improving magnetic loss capability and optimizing impedance matching. Doped CoOx promotes the charge accumulation, interfacial polarization, and multiple scattering of the CeO2 for strengthening the EW absorption and attenuation, which display superb minimum reflective loss (RLmin) of −74.4 dB with a wide effective absorbing bandwidth (EAB) of 5.26 GHz. Furthermore, a dual crosslinking strategy is employed to fabricate CeO2@Co‐9% into an aerogel device with integrated lightweight, heat insulation, compression resistance, and fame‐retardant functions. This work presents an excellent example of large‐scale fast synthesis of high‐performance CeO2‐based EWAMs and multiplication 3D devices.

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Fabrication of CeO2/Co/C composites for high-efficiency electromagnetic wave absorption

Cited by 6 publications

References 62 publications

Co/CeO₂/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Co/CeO₂/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Heterostructured BN@Co‐C@C Endowing Polyester Composites Excellent Thermal Conductivity and Microwave Absorption at C Band

Hetero‐Interface Engineering on 9.0 wt% CoO_x‐Doped CeO₂ Nanorods as Electromagnetic Wave Absorber and Integrated into Multifunctional Aerogel

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Fabrication of CeO2/Co/C composites for high-efficiency electromagnetic wave absorption

Cited by 6 publications

References 62 publications

Co/CeO2/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Co/CeO2/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Heterostructured BN@Co‐C@C Endowing Polyester Composites Excellent Thermal Conductivity and Microwave Absorption at C Band

Hetero‐Interface Engineering on 9.0 wt% CoOx‐Doped CeO2 Nanorods as Electromagnetic Wave Absorber and Integrated into Multifunctional Aerogel

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Co/CeO₂/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Co/CeO₂/C composites derived from bimetallic metal–organic frameworks for efficient microwave absorption

Hetero‐Interface Engineering on 9.0 wt% CoO_x‐Doped CeO₂ Nanorods as Electromagnetic Wave Absorber and Integrated into Multifunctional Aerogel