Study Of Flexible Supercapacitor Based On Porous Carbon Materials And Composites

Recently,exploring novel carbon-based materials with improved electrochemical performance is of great important for their practical application in energy storage system.As we all know,the porous carbon-based supercapacitor is recognized as an significant type of energy storage device due to the higher energy density,faster charge/discharge speed and longer lifetime.The structure of porous carbon with high surface area and excellent stability have attracted many researcher'eyes.In addition,the high conductivity has also achieved through the large amount of porous because it provides freeway for electron moving between the electrode and electrolyte.Furthermore,the pesudocapacitance material can absorb large amount of electrons with redox react in the test system.The innovation of this paper mainly includes the following two aspects.Firstly,we design the supercapacitor of mesopore carbon/ polyaniline.This structure try to combine the two property of high surface and excellent conductivity of mesopore carbon and redox react of polyaniline to improve the electrochemical performance of supercapacitors.The morphology and structure of materials and electrochemical performance of supercapacitor were studied respectively.The experiment shows that the mesopore carbon has rough surfaces and we can clearly see the porous structure with the TEM test.The Raman shows ratio of ID/IG of mesopore carbon is 0.7 while the large specific surface area illustrates the composite possess better electric double-layer capacitor performance.Furthermore,the electrochemical test shows the porous carbon and polyaniline make a great contribute for capacitance and this also means the structure has better potential to be used for supercapacitor.Secondly,we synthesis the composite of iron doped graphitized porous carbon/carbon-nanotube and it mainly aims to combine the porous structure and nanotube structure to improve the surface area.First,we test the electrochemical performance with the electrolyte of 6 mol L-1 KOH?3 mol L-1 KOH?1 mol L-1 Na2SO4 respectively and the result shows the outstanding performance with the 6 mol L-1 KOH electrolyte.Then,we synthesis the composite with(8:1)?(6:1)?(4:1)mass ratio of iron doped graphitized porous carbon and carbon nanotube,which aims to find the proper ratio to synthesis the best morphology ? structure of materials and electrochemical performance of supercapacitor.The study shows the(6:1)possess the best morphology and its surface has large amount of uniform carbon nanotube which can improve the conductivity and stability.What's more,its electrochemical is two times than the other composites and this means that the proper amount of carbon nanotube not only improve the transfer speed of electron and but also possess the more large surface area.