In this paper, we synthesize a polyaniline (PANI) grafted with carbon fiber (CF) composite (PANI-g-CF) linked by amide group (–NH–CO) covalent bond for flexible supercapacitor (SC) electrode material. The –NH–CO covalent bond enhances the interaction between the PANI and CF, which is confirmed by infrared spectroscopy, Raman spectrum, and X-ray photoelectron spectroscopy. The PANI-g-CF also extends π-conjugated electrons from CF to PANI, which is revealed by Ultraviolet and visible spectrum and nuclearmagnetic resonance spectroscopy. Due to the strong interaction and π-conjugated electrons, the PANI-g-CF exhibits highly electronically conductivity and benefits rapid charge transfer for charge storage. As a SC electrode material, the PANI-g-CF exhibits specific capacitance of 441F g⁻¹at 1 A g⁻¹with rate capability of 75.43% from 1 A g⁻¹ to 10 A g⁻¹. Especially, PANI in PANI-g-CF possesses high specific capacitance of 1178 F g⁻¹, suggesting the ultra-utilization of PANI for SCs. Due to the ultra-intimate contact of the PANI and CF, The assembled flexible SC using PANI-g-CF as electrode materials shows highly stability in long-term cycle with 88.80% and 92.9% of the initial capacitance after 10,000 cycles and mechanical folding 2000 times, respectively.

在本文中，我们合成了通过碳酰胺基（–NH– CO）共价键连接的碳纤维（CF）复合材料（PANI-g-CF）接枝的聚苯胺（PANI），用于柔性超级电容器（SC）电极材料。–NH–C O共价键增强了PANI和CF之间的相互作用，这已通过红外光谱，拉曼光谱和X射线光电子能谱得到证实。PANI-g-CF还将π共轭电子从CF扩展到PANI，这通过紫外光谱和可见光谱以及核磁共振波谱得以揭示。由于强大的相互作用和π共轭电子，PANI-g-CF表现出很高的电子导电性，并有利于电荷存储的快速电荷转移。作为SC电极材料，PANI-g-CF的比电容为441F g ^-1在1 A g ^-1下具有从1 A g ^-1到10 A g ^-1的75.43％的速率能力。尤其是，PANI-g-CF中的PANI具有1178 F g ^-1的高比电容，这表明PANI可用于SC。由于PANI和CF的紧密接触，使用PANI-g-CF作为电极材料组装的柔性SC在长期循环中显示出高度的稳定性，在10,000次循环和机械折叠后，其初始电容为88.80％和92.9％分别是2000次。