Preparation of Poly(7-formylindole)/carbon Fibers Nanocomposites and Their High Capacitance Behaviors
Preparation of Poly(7-formylindole)/carbon Fibers Nanocomposites and Their High Capacitance Behaviors
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聚(7-甲酰基吲哚)/碳纤维纳米复合材料的制备及其高电容行为
DOI：
10.20964/2017.09.72
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发表时间：
2017
影响因子：
1.5
通讯作者：
Xu Jingkun
中科院分区：
文献类型：
--
作者：
Ye Guo;Ma Xiumei;He Yun;Duan Xuemin;Zhou Weiqiang;Xu Jingkun
聚吲哚由于其独特的物理和电化学性能，作为一种有前途的材料，受到了广泛的研究。本文首次在含有0.1 M LiClO4的乙腈溶液中，将7-甲酰基吲哚直接阳极氧化，在碳纤维上电化学合成了聚（7-甲酰基吲哚）（PFIn）薄膜。红外光谱表明单体的聚合位点发生在吲哚环的C2和C3位置。通过SEM观察碳纤维表面PFIn膜的形貌，发现PFIn膜紧密包裹在碳纤维表面（PFIn/CF）。电化学结果表明，PFIn/CF电极在20 a g -1时的比电容为637 F g -1。在21 kW kg -1的高功率密度下，能量密度达到约42 Wh kg -1。经过1000次循环后，PFIn/CF仍保持74.1%的初始比电容和100%的库仑效率。结果表明，PFIn/CF是一种很有前途的柔性超级电容器电极材料。
Polyindoles belonging to the fused-ring family have attracted extensive investigation as promising materials due to their unique physical and electrochemical properties. Herein, poly(7-formylindole) (PFIn) film was firstly synthesized electrochemically on carbon fibers by direct anodic oxidation of 7formylindole in acetonitrile solution containing 0.1 M LiClO4. FT-IR spectra indicated that the polymerization site of monomer happened at the C2 and C3 positions of indole ring. The morphology of PFIn film on carbon fibers was investigated through SEM observation, which indicated that PFIn film tightly wrapped over carbon fibers (PFIn/CF). Electrochemical results indicated that PFIn/CF electrode showed a remarkable specific capacitance of 637 F g -1 at 20 A g -1 . The energy density reached about 42 Wh kg -1 at a high power density of 21 kW kg -1 . Furthermore, PFIn/CF still maintained about 74.1% of initial specific capacitance and 100% coulombic efficiency after 1000 cycles. These results revealed that PFIn/CF was a promising electrode material for the flexible supercapacitors application.