کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5431983 | 1508825 | 2017 | 14 صفحه PDF | دانلود رایگان |
Flexible free-standing materials make the electrode fabrication process simple in comparison with the conventional binder-enriched electrodes, especially for those with desirable mechanical strength. In the present work, the crosslinked multi-walled carbon nanotubes (C-CNTs) films with tensile strength of >1.75Â MPa, were prepared by facile filtering the dispersion of the micrometer-scaled 3-D framework of crosslinked carbon nanotubes with common water pump, and used as high-strength conductive skeleton for polyaniline (PANI). The preparing conditions were optimized for the best electrochemical property of the flexible C-CNTs/PANI composite films. As free-standing electrodes for supercapacitors, the highest specific capacitance of 507Â F/g or 314Â F/g, energy density of 70.4 or 43.6Â Wh/kg and power density of 0.44 or 0.43Â kW/kg were achieved with the in-situ chemical oxidative polymerization or solution coating technique, respectively. Then the independently double-crosslinked carbon nanotubes/polyaniline (C-CNTs/TC-PANI) composite films were obtained by thermal crosslinking (TC) the PANI coatings in the C-CNTs/PANI films. Their specific capacitance, energy density, and power density increased to 531Â F/g and 455Â F/g, 73.8 and 63.2Â Wh/kg, 0.49 and 0.47Â kW/kg with the in-situ chemical oxidative polymerization or solution coating technique respectively, and their electrochemical cyclic stability was also enhanced distinctly.
132
Journal: Carbon - Volume 122, October 2017, Pages 761-774