The Electrochemical Performance Of Fibrous And Interdigital Flexible Supercapacitors

The NiCo2O4nanowire on the skin of the Carbon Fiber Cloth (CFC) flexiblebasement, which is300nm length and made up by nanoparticles about15nm and has ahigh specific surface area due to its porous structure, was manufactured by means ofmicrowave hydrothermal method. To further enhance the properties of the activematerial. The MoS2which like gossamer has been further synthesized and covered onNiCo2O4via the same way. The two-step samples have been tested about cyclicvoltammetry, galvanostatic charge-discharge, AC impedance measurements and longcharge-discharge cycle test, respectively. The test result shows that the specificcapacitance of NiCo2O4is302.7F/g, there was88.2%retain after850times circulation,and for NiCo2O4@MoS2the specific capacitance is439.2F/g, after850numbers cyclealso retain90.2%capacitance values.PET is used as the transparent and flexible substrate, and the reduced graphiteoxide as the active materials. Based on the types of CNTs that have been used, the fivekinds of fabricated energy-storage devices were manufactured by LightScribetechnology and named as LSG-MSC, LSG/MWCNTs(60nm)-MSC,LSG/MWCNTs(20nm)-MSC, LSG/MWCNTs(8nm)-MSC, and LSG/SWCNTs-MSC,Respectively. The result of the electrochemical performance shows that TheLSG/SWCNTs-MSC has the most excellent energy storage capability. Its volumetriccapacitance reaches3.10F/cm3at a current density of1000mA/cm3, the volumetricenergy density is0.84mWh/cm3and power density is1.0W/cm3. There is88.6%capacitance retention left after5000times constant current charge and discharge cycleabout the LSG/SWCNTs-MSC. There have little electrochemical performance effecton LSG/SWCNTs-MSC that bending at different angles. The fourLSG/MWCNTs-MSCs were carried out in series and parallel constant streamdischarge test, showed excellent characteristics of series and parallel. The studyproved that it will produce stacking effect when graphite oxide reduced to graphenefor the existence of Van der Waals’ force. It is benefical to the electrochemical performances for the light scribed graphene interdigital micro supercapacitor withinsert carbon nanotubes to graphite oxide layers. Carbon nanotubes with smaller sizeare easier to be inserted into the layers of the graphite oxide. It is capable to weakenthe stacking effect about the light scribed graphite oxide by inserting carbon nanotubesinto the graphite oxide layers.