| 초록 |
Recently, 2D-titanium carbide MXenes (Ti3C2) have been studied as supercapacitor materials because of their metallic conductivity, layered structure, hydrophilicity, and etc. In this study, 2D MXene sheets were prepared by etching Al layer from Ti3AlC2 (MAX) precursors in LiF and HCl solution. Delaminated 2D-MXenes were obtained from etched multi-layer MXene through probe sonication and freeze drying method. We fabricated binder-free MXene electrode directly on current collectors by employing an electrospray technique. The electrosprayed MXene electrode shows highly porous micron scale thickness. Also, we conducted electrochemical mesurement in alkalli, neutral, and acidic aqueous electrolyte system. The capacitance of electrosprayed electrodes showed 130, 100, and 450 F/g at 100 mV/s in 6M KOH, 0.6M K2SO4, 1M H2SO4 aq. electrolytes, respectively. Enhanced electrochemical behaviors were attributed from highly porous structures and binder free electrodes in electrosprayed system. |
