Based on various carbon nano materials, the ternary composite functionalized carbon nanotubes (FMWCNTs) @ carbon quantum dots (CQDs) @ polyaniline (PANI) was prepared by in-situ polymerization and hydrothermal method. The carbon-based material was made into an electrode sheet. The morphology and microscopic nanostructures were characterized by FTIR, field emission scanning electron microscopy and field emission transmission electron microscopy. Cyclic voltammetry and the galvanostatic charge discharge method was adapted to study the electrochemical properties of these active materials. Our results showed that the specific capacitance of FMWCNTs @ CQDs @ PANI was as high as 534 F/g, while it was 362 F/g, 319 F/g and 279 F/g for PANI @ FMWCNTs, PANI @ CQDs and polyaniline. This means that the specific capacitance of FMWCNTs @ CQDs @ PANI is increased by 47.5%, 67.4% and 91.4% comparing with the capacitance of PANI @ FMWCNTs, PANI @ CQDs and polyaniline, respectively. Moreover, the specific capacitance retention rate of the ternary active electrode after 1000 times of constant current charge and discharge cycle reached 86%, while it was 60% for PANI @ FMWCNTs, 72% for PANI @ CQDs and 65% for polyaniline.

中文翻译：

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功能化多壁碳纳米管的制备及其电化学性质@碳量子点@聚苯胺三元复合电极材料

基于多种碳纳米材料，通过原位聚合和水热法制备了三元复合功能化碳纳米管（FMWCNTs）@碳量子点（CQDs）@聚苯胺（PANI）。将碳基材料制成电极片。通过FTIR，场发射扫描电子显微镜和场发射透射电子显微镜对形貌和微观纳米结构进行了表征。循环伏安法和恒静电荷放电法被用来研究这些活性材料的电化学性能。我们的结果表明，FMWCNTs @ CQDs @ PANI的比电容高达534 F / g，而PANI @ FMWCNTs，PANI @ CQDs和聚苯胺分别为362 F / g，319 F / g和279 F / g。这意味着FMWCNTs @ CQDs @ PANI的比电容分别比PANI @ FMWCNTs，PANI @ CQDs和聚苯胺的电容增加了47.5％，67.4％和91.4％。另外，经过1000次恒定电流充放电循环后，三元活性电极的比电容保持率达到86％，而PANI @ FMWCNTs为60％，PANI @ CQDs为72％，聚苯胺为65％。