| 초록 |
In the present work, rationally prepared carbon fiber (CF)-supported high-mass-loaded 2D-nanosheet-based MnO2 (MnO2@CF, 6.6 mg/cm2) and MoS2 (MoS2@CF, 7.2 mg/cm2) were used in a high-energy pseudocapacitor. These hierarchical 2D nanosheets yielded outstanding areal capacitances of 1187 and 495 mF/cm2 at high current densities with excellent cycling stability. Pliable all-pseudocapacitive solid-state asymmetric supercapacitor was designed using MnO2@CF and MoS2@CF as the positive and negative electrodes, respectively, with ultrahigh mass loading of 14.2 mg/cm2. The assembled solid-state asymmetric cell conveyed an energy density of 1.87 mWh/cm3 at a power density of 70 mW/cm3, and it showed capacitance retention of 92.25% over 11000 cycles and a very small diffusion resistance (1.72 Ω/s1/2). Thus, it is superior to most state-of-the-art reported pseudocapacitors. |
