Consider that black phosphorene (BP) nanosheets can compensate each other between the MXene layers, thus preventing the agglomeration of MXene, and forming a more compact microstructure. This study successfully synthesizes f-MXene non-covalently modified by the strong electrolyte PHMB. A series of MXene/BP nanocomposite films are prepared by the strong electrostatic interaction between f-MXene and BP nanosheets and verified by FTIR, XRD, and XPS. The cross-section SEM imaging further reveals the formation of densely ordered aligned microstructures. Thanks to the compensation effect of BP nanosheets between f-Mxene layers, and constructed more efficient thermal conductivity pathways. With a low amount (5 wt%) of BP, the in-plane and through-plane thermal conductivity of 5-MXene/BP film increased to 12.71 and 0.37 W m-1 K-1, respectively. TGA and MCC results demonstrate the flexible 5-MXene/BP film exhibited an ultra-low total release rate (5.8 kJ g-1) and excellent thermal stability (66.74 wt% residual carbon). In consideration of their improvement in thermal conductive performance, MXene/BP nanocomposite film can be the most promising candidates for thermal management applications.
