WS2 nanosheets@ZIF-67-derived N-doped carbon composite as sodium ion battery anode with superior rate capability

•This work provides a novel and reliable insight for designing bimetallic sulfide with 2D nanostructure.•Laurel-leaf-like Co9S8/WS2@NC delivers a capacity of 359 mA h g−1 at 5.0 A g−1•This as-prepared bimetallic sulfide exhibits a high capacitive contribution ratio of 90.8%.•The excellent performance originates from interface electric field and synergistic effects Co9S8 and WS2.