功能化碳纳米管膜负载聚(2,5-二羟基-1,4-苯醌硫)柔性电极的制备及在柔性非对称超级电容器中的应用

王健; 胡稳茂; 王庚超

p-Chloroaniline modified carbon nanotube film(pca-CNT)was prepared by diazotization reaction of carbon nanotube(CNT)film.Poly(2,5-dihydroxy-1,4-benzoquinonyl sulfide)(PDBS)was grown uniformly on the the surface of pca-CNT by in situ polycondensation method.The obtained pca-CNT@PDBS composite was used as flexible electrode later.The morphology and structure of composite was characterized by field scanning electron microscope(FE-SEM),field transmission electron microscope(TEM),energy dispersive spectrum(EDS),Fourier infrared spectrum(FI-IR)and photoelectron spectroscopy(XPS).The results indicated that PDBS was coated on the pca-CNT film successfully.The electrochemical testing showed that the pca-CNT@PDBS flexible electrode exhibited an area specific capacitance(CA)of 108 mF/cm2 at the current density of 1 mA/cm2,higher than pure PDBS(65.6 mF/cm2)and CNT-supported PDBS(CNT@PDBS,83.2 mF/cm2).With the pca-CNT@PDBS and CNT@PDBS as flexible positive electrode respectively,CNT-supported poly(1,5-diamino-anthraquinone)(CNT@PDDA)as flexible negative electrode,and crylic rubber cross-linked memberane/tetraethyl tetrafluorate acetonitrile electrolyte(ACM/Et4 NBF4-AN)as the quasi-solid-state electrolyte,organic asymmetric supercapacitor were assembled at the same time.The electrochemical results showed that area specific capacitance of the as-assembled flexible organic asymmetric supercapacitor was 79.6 mF/cm2 at the current density of 2 mA/cm2 and its volumetric energy density was 1.63 mW·h/cm3 at the power density of 63.5 mW/cm3.The capacitance retention of CNT @ PDBS//ACM/Et4 NBF4-AN//CNT @ PDAA organic asymmetric supercapacitor was about 30.5% after only 7 500 cycles,exhibiting bad cycle performance.After 8 000 charging-discharging cycles,specific capacitance retention of pca-CNT @ PDBS//ACM/Et4 NBF4-AN//CNT@PDAA was 80.5%,presenting much better cycle performance.

SUPERCAPACITOR electrodes; ASSOCIATION for Computing Machinery; ENERGY density; TRANSMISSION electron microscopes; SCANNING electron microscopes; PHOTOELECTRON spectroscopy; CARBON films; NICKEL sulfide

Journal of Functional Polymers, 2019, Vol 32, Issue 2, p184

1008-9357

Academic Journal

10.14133/j.cnki.1008-9357.20180306001