In this work, we have employed one-step solvothermal method to prepare CuS nanosheets based 3D micro-flowers grown on pomelo peel-derived porous activated carbon (PPAC) as electrode materials for high-performance supercapacitors. The results show that the addition of porous PPAC materials activated by KOH solution can greatly affect the morphology and electrochemical performance of CuS/PPAC composites. As expected, as-prepared CSPC-2 based electrode possesses higher specific capacitance (954.0 Fg(-1)) compared with pure CuS (579.2 Fg(-1)) and porous PPAC-3 (329.6 Fg(-1)) based electrodes at a current density of 1.0 Ag-1. In addition, as-prepared CSPC-2 based electrode exhibits outstanding rate capacity (954.0 Fg(-1) at 1.0 Ag-1 and 519.6 F g(-1) at 9.0 Ag-1) and excellent cyclic stability (81.99% capacitance retention at 7.0 Ag-1 after 5000 continuous charge/discharge cycles). The results above illustrate that as-prepared CuS/PPAC composite is a suitable candidate for electrode materials for high-performance supercapacitors. (C) 2019 Elsevier Ltd. All rights reserved.