Journal of the Taiwan Institute of Chemical Engineers ( IF 5.5 ) Pub Date : 2018-01-17 , DOI: 10.1016/j.jtice.2018.01.003 Ji Hwan Jeong , Bo-Hye Kim
Carbon nanofibers (CNFs) with controllable pore sizes are fabricated by a simple electrospinning method with the help of boron trioxide (B2O3), and their electrochemical properties as electrodes are investigated in aqueous electrolyte. The optimized result is obtained with a B2O3 concentration of 10 wt% in a spinning solution, offering a large specific surface area of 1065 m2/g with a mesopore volume fraction up to 35%, pore size range of 2–3 and 20–50 nm, and many heteroatoms. The CNF composite with 10 wt% B2O3 concentration (PMB-10) shows a high gravimetric capacitance of 126.31 F/g with a capacitance retention of 84%, and a high energy density of 12–18 W h/kg in the power density range of 400–10,000 W/kg. Thus, the porous structures and heteroatom contents of the PMB composites can be controlled by varying the B2O3 content as the pore expanding agent, as well as heteroatom generator, to optimize the electrochemical performance in an aqueous electrolyte.
中文翻译:
具有可控制孔径的三氧化硼电纺多孔碳纳米纤维,用于电化学电容器电极
借助三氧化硼(B 2 O 3),通过简单的静电纺丝方法制备了孔径可控的碳纳米纤维,并研究了它们在水电解质中作为电极的电化学性能。在纺丝溶液中B 2 O 3浓度为10 wt%时,可获得最佳结果,比表面积为1065 m 2 / g,中孔体积分数高达35%,孔径范围为2-3和20–50 nm,以及许多杂原子。具有10 wt%B 2 O 3的CNF复合材料浓度(PMB-10)的重量重电容为126.31 F / g,电容保持率为84%,在400-10,000 W / kg的功率密度范围内,其能量密度为12-18 W h / kg。因此,可以通过改变作为扩孔剂的B 2 O 3含量以及杂原子产生剂来控制PMB复合材料的多孔结构和杂原子含量,以优化水性电解质中的电化学性能。