| 초록 |
Aqueous supercapacitors have attracted as the next generation energy storage devices because they have several advantages such as safety, environmental friendliness and high ionic conductivity. However, energy density of aqueous capacitors is limited by the narrow electrochemical window of water solvent (1.23 V). To increase the not enough energy density, various studies have been conducted for expanding the electrochemical window by constructing water-in-salts electrolyte, adjusting appropriate pH level, etc. However, those methods can deteriorate the ionic conductivity and cycling performances, wherein more studies are required. In this study, we investigated various aqueous electrolyte systems based on different charge carriers such as lithium, potassium, magnesium and zinc ions, and their effects on carbon-based electrode materials were studied by using nanoporous carbons with different pore structures. |
