NiFe-LDH loaded on N-doped Paulownia -derived carbon as a bifunctional oxygen electrocatalyst for rechargeable zinc–air batteries

2D NiFe-LDH nanosheets loaded on 3D N-doped biomass-derived carbon, NiFe-LDH/NBC, were prepared using an in situ growth method assisted by electric field induction as an excellent bifunctional electrocatalytic catalyst.