Iron-sulfur doped electrode materials from carbonization of the composite of polyaniline and soybean protein

• 1、School of Chemical & Environmental Engineering，China University of Mining & Technology，Beijing，10083

Abstract：In order to prepare excellent performance supercapacitor electrode materials, soybean protein gel containing Fe ions/ linear polyaniline is synthesized by a one-step method using soy as a carbon source, which is rich in a variety of heteroatoms and inexpensive, FeSO4 is an oxidant, and polyaniline is an additive. The ternary composite material is prepared by calcination under inert gas. For this material, XRD, XPS, SEM and other methods are used to analyze the structure, and an electrochemical workstation is used for electrochemical testing. The results show that the composite material has a good specific surface area (230.12m2/g) and a porous structure. In the 6mol/L KOH electrolyte, it shows a specific capacity of 589.2F/g at 1A/g. The energy density of the self-assembled asymmetric supercapacitor is 16.11 Wh/kg, the power density is 375W/kg, and at the current density of 5A/g, after 5000 cycles, its capacity retention rate is over 89%.

Keywords： composite materials polyaniline iron-sulfide soyben protein supercapacitors