Fig. 8.

a TEM image of BP nanosheets with the zone axis along [010] in electron diffraction pattern. b STEM-HAADF image of two thin-layer black phosphorus. c EDS mapping of elements d HRTEM images of thin-layer black phosphorus e SEM images of 2D BP/graphene composite materials cross-sectional view. f Second galvanic charge/discharge performance of thin-layer BP, graphene and 2D BP/graphene hybrid sheets at a current density of 100 mA g⁻¹. g Rate performance of thin-layer black phosphorus, graphene and 2D BP/graphene hybrid sheets at different current densities. h Cycling performance and coulombic efficiency of 2D BP/graphene composite anode materials under a current density of 500 mA g⁻¹ after 500 cycles. Adapted with permission [137]. Copyright 2016 John Wiley and Sons