Preparation Of Mesoporous Carbon Materials And Aqueous Electrolyte And It’s Electrochemical Properties

With the supercapacitor performance was gradually expanded,its high power density,long life cycle,economic and its environmental advantages becomes more noticeable.Low energy density,this problem makes it impossible to substitute conventional energy reserves,such as Li battery.As a electrolyte supercapacitor,electrolyte material and aqueous electrolyte are improtant factors on it’s property.The supercapacitors has lower energy density,because for the littler voltage window of aqueous electrolyte and the lower capacitance of carbon material.To improve lower energy density of supercapacitors,we optimize voltage window of aqueous electrolyte and the porous structures of carbon material.1、 A simple method of synthesizing nitrogen-self-doped mesoporous carbons by the direct carbonization of Ferric ammonium citrate(FAC)in an inert atmosphere.The resulting materials stacked by nanospherical particles exhibited a large the Brunauer–Emmett–Teller(BET)surface area of up to1021 m2g-1,bimodal porosity(pores centered at approximately 2 and 9 nm),and nitrogen self doping(3.86%).The specific capacitance of FBNC-700 is225 F g-1 in 1 M H2SO4 aqueous solutions.2、 To study the feasibility of soluble organic salt solution as aqueous electrolytes.We preliminarily select the voltage window of the sodium potassium tartrate solution is 1.3 V(-0.8 V-0.5 V).With two electrodes,the FBNC-700 show 97 F g-1at 0.5 A g-1in 2 M sodium potassium tartrate solution.The result of experiments show that the 2 M sodium potassium tartrate solution can be a aqueous electrolytes for supercapacitors.3、 To study the feasibility of sodium acetate solution as aqueous electrolytes.We preliminarily select the voltage window of the sodium potassium tartrate solution is 1.8 V(-1.1 V-0.7 V).In 1.5 M sodium acetate solution,the FBNC-700 show 254 F g-1.The result of experiments show that the 1.5 M sodium acetate solution can be a aqueous electrolytes which has the higher voltage window for supercapacitors.