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我組吳亞鴿碩士在Microporous and Mesoporous Materials上發(fā)表論文

           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(hào):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.