Mixed-dimensional hierarchical configuration of 2D Ni2P nanosheets anchored on 1D silk-derived carbon fiber for extraordinary electromagnetic wave absorption

•Mixed-dimensional hierarchical of 2D Ni2P nanosheets anchored on 1D silk-derived carbon fiber composites were prepared.•A minimum reflection loss of −56.9 dB and a broad effective bandwidth of 7.2 GHz with 20 wt% filling ratios were achieved.•Ni2P not only shows remarkable dielectric characteristic and EMW absorption ability, but also denote to dual-conductive loss and polarization relaxation loss.