球状聚苯胺/豆蛋白凝胶制备用于超级电容器的铁氧氮掺杂炭

he method of preparing nano-carbon spheres, whose surface doped by multi-atoms using the coagulation effect of soybean protein, was explored. The morphology, structure and surface characteristics of the nano-carbon sphere were characterized by SEM, XRD, XPS, etc. The research shows that the prepared nanocarbon ball has hierachical porous structure with a diameter of about 400nm, an average aperture of 9.3nm, an average hole-capacity of 0.034cm3/g, and a specific area (BET) of 22.7m2/g. Its surface contains 6.34% nitrogen, 9.99% oxygen and iron 1.56 % , of which iron is mainly in the form of ferroferric oxide. This material, with a fast electrochemical response in 6 M potassium hydroxide solution, has a specific capacitance of 457.3F/g, at current density of 1A/g under the GCD method. An asymmetric supercapacitor was assembled with this nano-carbon ball as anode material, activated carbon as cathode material. IStudies on preparatin of nano-carbon spheres doped by ferroferric oxide on their surface through soy protein gel for high-performance supercapacitorst can work at 1.5V potential, and its capacitance retention maintains more than 96% after 5000 times charge/discharge cycles at 5A/g. And it has a lower internal resistance and the charge transmits electrical resistance. The energy and power densities of the device are 13.8Wh/kg and 15kW/kg, respectively. The material is a potential electrode material for high-performance supercapacitors, which will have a good application in the field of energy storage. At the same time, further optimizing the doping conditions on the surface of carbon ball will help to improve its properties for the energy storage and expand its applications in many other fields.