基于纸纤维/晶须状碳纳米管/活性炭三元无金属集流体复合纸电极的柔性超级电容器

Flexible Supercapacitor Based on a Paper Fibers/Whisker-like Carbon Nanotubes/Activated Carbon Ternary Composite Paper Electrode with Metal-free Current Collector

以纸纤维(PF)为基体,晶须状碳纳米管(WCNT)和活性炭(AC)为功能添加物,采用真空抽滤法制成PF/WCNT/AC三元无金属集流体复合电极。利用扫描电子显微镜(SEM)、X射线衍射(XRD)光谱仪、拉曼(Raman)光谱仪对其进行表征和分析,采用两电极测试体系对组装的超级电容器性能进行测试。结果表明,与涂布法所得的铝箔集流体(Al/WCNT/AC)电极相比,由PF/WCNT/AC三元复合电极组装的超级电容器比电容大幅提高,并展现出良好的充放电性能。在1mV/s的扫描速率下比电容达325F/g,几乎是Al/WCNT/AC超级电容器(108.7F/g)的3倍。PF/WCNT/AC超级电容器在0.4A/g电流密度下的比电容为95F/g,在3.2A/g电流密度下的比能量与比功率分别为36.76 Wh/kg、5.52kW/kg。

Using paper fibers（PFs）as matrix,whisker-like carbon nanotubes（WCNTs）and activated carbon（AC）as functional additives,a P F/WCNT/AC composite paper electrode was fabricated by traditional paper-making process.Scanning electron microscopy（SEM）,X-ray diffraction（XRD）,Raman spectroscopy were used for characterization,and a double-electrode system was employed to measure the performance of supercapacitor based on the P F/WCNT/AC composite paper electrode.The results showed that the supercapacitor with P F/WCNT/AC electrode exhibits a good charge and discharge performance,and a significantly increased specific capacitance compared to the supercapacitor with Al/WCNT/AC composite that has a metal current collector,as the former（325 F/g）was 199% higher than the latter（108.7 F/g）under a scan rate of 1 mV/s.P F/WCNT/AC supercapacitor had a specific capacitance of 95 F/g while the current density was 0.4 A/g,and its specific energy and specific power were respectively 36.76 Wh/kg,5.52 kW/kg while the current density was 3.2 A/g.