我組吳亞鴿碩士在Microporous and Mesoporous Materials上發(fā)表題為“New comprehensions on structure superiority of asymmetric carbon membrane and controlled construction of advanced hierarchical innerstructure for high performance supercapacitors”論文一篇。
文章DOI號：10.1016/j.micromeso.2018.08.011
文章摘要：In this study, both asymmetric and symmetric carbon membranes are designed and fabricated through liquidliquid phase separation and solvent evaporation, respectively. In contrast, asymmetric carbon membrane exhibits asymmetric porous structure with 3 D nanoscaled architecture, which facilitates ion transportation by shortening diffusion pathways for charging and discharging process. Meanwhile, PEG is introduced into the casting solution to mediate the pore size to a rational range and enhance the surface area. When the ratio of PEG is 10 wt%, the carbon membrane shows the highest specific surface area and hierarchical porous size. A maximum specific capacitance of 247 F g 1 is achieved at the current density of 0.5 A g 1 with good rate capability in an aqueous electrolyte of 6 mol L 1 KOH within the potential range of 1 to 0 V. Moreover, symmetric supercapacitors device assembled with the prepared carbon membrane achieved high energy density (9 W h kg 1) and power density (400 W kg 1) in 1 M Na2SO4 solution. The high electrochemical performance reveals the advantage of the rational micropore structure, and the asymmetric membrane architecture rose by fast solvents exchanging during phase-separation.