State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, Guangdong, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, Guangdong, China.
Int J Biol Macromol. 2018 Oct 15;118(Pt A):478-484. doi: 10.1016/j.ijbiomac.2018.06.088. Epub 2018 Jun 19.
Iron oxide particle-decorated, hollow, carbon nanofibers (HCNFs), with poly(styrene-co-acrylonitrile) solution as the core and acetic acid lignin as the shell, were manufactured using a coaxial electrospinning technique, using iron(III) acetylacetonate as the iron oxide-precursor additive in the shell. The fabricated HCNFs exhibited a high specific capacitance of 121 F·g at 0.5 A·g, which was 2.18-fold that of solid electrospun nanofibers under the same conditions. The samples also possessed a superior cycling life, with a 90% retention rate after 1000 cycles in 1 M sodium sulfite. In this system, HCNFs exhibited high surface areas, as the result of hollow structures and producing capacitance improvement, while iron oxide particles enhanced electrochemical properties via reversible redox reactions. The attractive performances exhibited by these supercapacitors yielded them potentially promising candidates for future energy storage systems.
用同轴电纺技术制备了一种以聚（苯乙烯-co-丙烯腈）溶液为芯、乙酸木质素为壳的氧化铁颗粒修饰的中空碳纳米纤维（HCNF），壳中添加了乙酰丙酮铁作为氧化铁前体添加剂。所制备的 HCNF 在 0.5 A·g 时表现出 121 F·g 的高比电容，比相同条件下的固态静电纺纳米纤维高 2.18 倍。该样品还具有优异的循环寿命，在 1 M 亚硫酸钠中 1000 次循环后保留率为 90%。在该体系中，HCNF 表现出高的比表面积，这是由于中空结构和产生的电容改善，而氧化铁颗粒通过可逆氧化还原反应增强了电化学性能。这些超级电容器的吸引力性能使它们成为未来储能系统有前途的候选材料。
