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Li F, Wu N, Kimura H, Wang Y, Xu BB, Wang D, Li Y, Algadi H, Guo Z, Du W, Hou C. Initiating Binary Metal Oxides Microcubes Electrsomagnetic Wave Absorber Toward Ultrabroad Absorption Bandwidth Through Interfacial and Defects Modulation. NANO-MICRO LETTERS 2023; 15:220. [PMID: 37812363 PMCID: PMC10562357 DOI: 10.1007/s40820-023-01197-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 08/28/2023] [Indexed: 10/10/2023]
Abstract
Cobalt nickel bimetallic oxides (NiCo2O4) have received numerous attentions in terms of their controllable morphology, high temperature, corrosion resistance and strong electromagnetic wave (EMW) absorption capability. However, broadening the absorption bandwidth is still a huge challenge for NiCo2O4-based absorbers. Herein, the unique NiCo2O4@C core-shell microcubes with hollow structures were fabricated via a facile sacrificial template strategy. The concentration of oxygen vacancies and morphologies of the three-dimensional (3D) cubic hollow core-shell NiCo2O4@C framework were effectively optimized by adjusting the calcination temperature. The specially designed 3D framework structure facilitated the multiple reflections of incident electromagnetic waves and provided rich interfaces between multiple components, generating significant interfacial polarization losses. Dipole polarizations induced by oxygen vacancies could further enhance the attenuation ability for the incident EM waves. The optimized NiCo2O4@C hollow microcubes exhibit superior EMW absorption capability with minimum RL (RLmin) of -84.45 dB at 8.4 GHz for the thickness of 3.0 mm. Moreover, ultrabroad effective absorption bandwidth (EAB) as large as 12.48 GHz (5.52-18 GHz) is obtained. This work is believed to illuminate the path to synthesis of high-performance cobalt nickel bimetallic oxides for EMW absorbers with excellent EMW absorption capability, especially in broadening effective absorption bandwidth.
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Affiliation(s)
- Fushan Li
- School of Environmental and Material Engineering, Yantai University, No. 30 Qingquan Road, Yantai, Shandong, 264005, People's Republic of China
| | - Nannan Wu
- School of Material Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China
| | - Hideo Kimura
- School of Environmental and Material Engineering, Yantai University, No. 30 Qingquan Road, Yantai, Shandong, 264005, People's Republic of China
| | - Yuan Wang
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK
| | - Ben Bin Xu
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK.
| | - Ding Wang
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK
| | - Yifan Li
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK
| | - Hassan Algadi
- College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, People's Republic of China
- Department of Electrical Engineering, Faculty of Engineering, Najran University, 11001, Najran, Saudi Arabia
| | - Zhanhu Guo
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, UK.
| | - Wei Du
- School of Environmental and Material Engineering, Yantai University, No. 30 Qingquan Road, Yantai, Shandong, 264005, People's Republic of China.
| | - Chuanxin Hou
- School of Environmental and Material Engineering, Yantai University, No. 30 Qingquan Road, Yantai, Shandong, 264005, People's Republic of China.
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