Fabrication of a tunable mesoporous polypyrrole/MXene composite with a sandwich structure for enhancing electromagnetic wave absorption performance.

5c and f , the dielectric loss capacity of the mPM generally shows a decreasing trend with the increase of frequency and the tan δ ε curve shows two obvious peaks, indicating the occurrence of double dielectric relaxation during the EMW loss process. 46 In Fig. 5d and e , the real part ( μ ′) and imaginary part ( μ ′′) of complex permeability are about 1.0 and 0.0, respectively, indicating the absence of a magnetic component in the composite.

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