| 초록 |
The low energy density (E) of a supercapacitor (SC) prevents the more active use of the device. Given the square-dependence of E on the operating potential, the E of SCs can be increased effectively by widening the potential window. Herein, ionic liquids (ILs)-based gel electrolytes, also known as ionogels, possessing high electrochemical and mechanical stability were used to develop SCs operating in the wide potential for high E. Also, by introducing 3D ordered and interconnected large mesoporous carbon as the electrodes, mass transport of the bulky ions was promoted. Through these, we successfully fabricated SCs with the high energy density (179 Wh kg−1). Additionally, the flexible all-solid-state SCs with outstanding energy storage performance were also successfully demonstrated and the device maintained its specific capacitance even in the fully folded state. These results offer effective strategies for developing high energy density and flexible capacitive energy storage devices. |
