| 초록 |
Recently, as the demand for small electronic devices increases, micro-supercapacitors are attracting great attention. This study reports laser photothermal method to make hierarchically porous structures on fluorinated polyimides (fPIs). During laser-induced graphitization, fluorine-containing functional groups in fPI are released out as gaseous products, leading to increase in number of micropores and thus form highly microporous structures. As a result, the patterned LIG (LIG-fPI) has a very large specific surface area (1126.0 m2 g−1), thus enhancing its electrochemical performance. Consequently, the micropatterned electrode shows an exceptional areal capacitance of 110 mF cm–2 in an H2SO4 aqueous electrolyte, 27 times higher than that of a LIG based on commercial polyimides and 7 times larger than that of current MSCs. Also, LIG-fPI-MSCs in an organic gel polymer electrolyte exhibits high energy and power densities of 0.58 mW cm–2 and 0.01 mWh cm–2, respectively. |
