碳纳米管导电纸超级电容器

Study on carbon nanotubes conductive paper supercapacitor

以纸纤维为基体,碳纳米管为导电剂,将分散好的碳纳米管与纸纤维混合均匀,然后进行抽滤制成碳纳米管导电纸。通过改变纸纤维与碳纳米管的比例制成不同碳纳米管含量的导电纸。利用扫描电子显微镜(SEM)、四探针电阻仪对其进行分析。以两电极体系方式检测超级电容器的性能,以1 mol/L AN/Et4NBF4为电解液,当纸纤维和碳纳米管的质量比为1∶1时,电容器比容量最大达到7.5 F/g。当纸纤维和碳纳米管的质量比为1∶3时,导电纸表面电阻下降到4.7Ω/sq,循环5 000次后,比容量保持1.8 F/g,电容量可以保留95%。

A new type of supercapacitor is fabricated with carbon nanotube （CNT） composite conductive paper as electrode materials. The paper fiber and carbon nanotubes are fully mixed and filtrated to form conductive papers. The conductive papers are characterized by scanning electron microscope （SEM） and four-point probe resistance meter. The two-electrodes supercapacitor cells are constructed with conductive paper as both electrodes and 1 mol/L ANEtaNBF4 as electrolyte. The testing results show that the maximum specific capacitance can reach 7.5 F/g with paper/CNT mass ratio of 1/1. The capacitance can keep 95% with 1.8 F.g-1 after 5 000 cycles with paper/CNT mass ratio of 1/3 and the surface resistivity decreases to 4. 7 12/sq.