交联状聚苯胺包覆碳纤维复合纳米线制备及电容特性

Preparation and Capacitive Performance of Interconnected Composite Nanowire based on Polyaniline coated Carbon Nanofiber

摘要:

以交联状氮掺杂碳纳米纤维(CNF)为碳骨架，采用插层辅助原位氧化聚合法使聚苯胺(PANI)均匀地在CNF表面包覆生长，制备了交联状聚苯胺包覆碳纤维(PANI/CNF)复合纳米线。采用TEM、SEM、TG、FTIR、Raman、XRD、XPS和BET对PANI/CNF复合纳米线的形貌和结构进行了表征。通过CV、EIS和GCD测试了PANI/CNF复合纳米线的电容特性。结果表明：PANI/CNF复合纳米线相互连通，表面呈荆棘状，具有多级空间结构。CNF质量分数为40%的PANI/CNF40复合纳米线电极在电流密度为1.0 A/g时，比电容达到820.31 F/g。电流密度增加到20.0 A/g时，比电容保留率为74.8%。在10.0 A/g 时，经过2000次充放电循环后电极的比电容保持率达到89.7%。

Abstract:

The interconnected polyaniline coated carbon nanofiber (PANI/CNF) composite nanowire, with interconnected N-doped carbon nanofiber (CNF) framework and PANI coating layer, had been synthesized via a vacuum-assisted intercalation in-situ oxidation polymerization method. The PANI/CNF composite nanowire samples were characterized by TEM, SEM, TG, FTIR, Raman, XRD, XPS and BET. The electrochemical properties of the samples were examined using CV, EIS, and GCD. The results showed that the interconnected PANI/CNF composite nanowire with the hierarchical structure in the shape of thorns. As supercapacitor electrode materials, the typical PANI/CNF40 sample with CNF content of 40%, had a high specific capacitance of 820.31 F/g (1.0 A/g), and specific capacitance retention rate of 74.8% (20.0 A/g). The specific capacitance was 89.7% of the initial specific capacitance after 2000 cycles (10.0 A/g).