柔性超级电容器是可穿戴电子设备等的重要组成部分。为探索制备柔性超级电容器的电极材料,引入热塑性乙烯-乙烯醇共聚物(EVOH)纳米纤维,利用苯胺原位氧化聚合反应制备石墨烯/聚苯胺/EVOH纳米纤维复合膜,采用傅里叶变换红外光谱(FT-IR)、X射线衍射仪(XRD)、热失重分析仪(TGA)、扫描电子显微镜(SEM)和电化学工作站分析了复合膜的结构和性能。研究结果表明,复合膜具有良好的柔韧性和力学强度。室温下,用四探针法测得复合膜的电导率为1.49S/cm,扫描速率为5mV/s时的比电容为51.5F/g,650次充放电循环后比电容的保持率可达80%。
Flexible supercapacitor is an important part of wearable electronic equipment.To explore the preparation of flexible supercapacitor electrode materials,the thermoplastic polyethylene-co-polyvinyl alcohol (EVOH) nanofiber was introduced to prepare flexible graphene/PANI/EVOH nanofiber composite film by in-situ oxidation polymerization of anilinein.The structure and property of film were characterized by Fourier transform infrared spectroscopy (FT-IR),X-ray diffraction (XRD),thermo-gravimetric analyzer (TGA),scanning electron microscopy (SEM) and electrochemical workstation.The results showed that the film exhibited superior flexibility and mechanical strength.The conductivity can reach 1.49 S/cm by four probe method at room temperature,the specific capacitance reached 51.5 F/g at 5mV/s,the majority (80%) of capacitance was remained after 650 cycles of charge and recharge at 500mA/g.
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基金资助
国家自然科学基金项目(21374015)
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