Synthesis and electromagnetic wave absorption properties of 3D spherical NiCo2S4 composites

Flower-like NiCo2S4 Microspheres Based on Nanosheet Self-Assembly Anchored on 3D Biomass-Derived Carbon for Efficient Microwave Absorption

“…It was very interesting that the tan δ μ values all displayed a trend of first increase then decrease with the increase in precursor content; according to the previous research, a high precursor concentration of the NiCo 2 S 4 might have a negative effect on the enhancement of magnetic loss, meaning that ideal magnetic loss can be obtained when the precursor concentrations were properly designed. 22 Generally, the mechanisms of magnetic loss contain hysteresis loss, domain resonance, eddy current loss, and natural resonance, and numerous research studies had demonstrated that eddy current loss and natural resonance often appeared at 2.0−18.0 GHz. 43,44 The eddy current loss can be described as the following 44,45 C f ( )…”

“…The abovementioned results showed that BNCS had better absorption performances than BDC, indicating that the introduction of NiCo 2 S 4 can effectively enhance the properties of the material, identified with the abovementioned analysis. To further demonstrate the highly effective absorption of the materials, the RL min values and effective bandwidth of the similar (mainly included the magnetic material combined with carbon-based material) and some novel EMW absorption materials (such as MXene composites, novel ceramics, and so on) reported in the previous research are shown in Figure and the detailed information is listed in Table S1. ,,,,− It can be observed that BNCS have superior EMW absorption performances, which can serve as a promising candidate for next-generation absorbers.…”

“…22 Zhao et al synthesized rGO/CNT/NiCo 2 S 4 composites via a hydrothermal strategy, and the RL min value achieved −35.80 dB at 8.10 GHz and the effective bandwidth of the material reached 2.70 GHz. 22 Notably, there are few reports on the modification of carbon composites by NiCo 2 S 4 , so it is necessary to conduct further research in this aspect.…”

“…NiCo 2 S 4 as a kind of binary metal sulfides has been widely used in the fields of batteries and capacitors owing to its excellent electrochemical property. , Meanwhile, because NiCo 2 S 4 has a good magnetic loss performance, it could be an excellent choice to design a carbon-based composite modified by NiCo 2 S 4 to serve as a microwave absorber . Zhao et al synthesized rGO/CNT/NiCo 2 S 4 composites via a hydrothermal strategy, and the RL min value achieved −35.80 dB at 8.10 GHz and the effective bandwidth of the material reached 2.70 GHz . Notably, there are few reports on the modification of carbon composites by NiCo 2 S 4 , so it is necessary to conduct further research in this aspect.…”

Rare-Earth Metal–Organic Framework@Graphene Oxide Composites As High-Efficiency Microwave Absorbents

“…On the basis of this new MOF, an MOF@GO composite material was prepared. The composite combines the wide absorption band of the trimetal MOF and electromagnetic wave attenuation performance of GO, − and the RL min and EAB achieve −49.1 dB and 6.72 GHz, respectively, which are 4 times that of single-metal MOF@GO. The proposed composite material is an excellent potential electromagnetic wave absorber.…”