The development of new energy storage devices to supply growing for greater security and better performance has been an important point to keep in advance of new portable electronics and electric vehicles. The electrochemical capacitors is part of the class of energy storage devices by presenting a high-energy storage and quick release of this energy, serving as back-up or main device in special cases. To improve its performance, the search for electrodes with higher surface area and better performance and electrolytes with wide electrochemical window has been investigated. Thus, graphene arises as an excellent candidate for electrode material since it is a 2D carbon material that has higher conductivity than copper, very low density, high strength and very high surface area, increasing the capacitance of the electrochemical capacitor. And as electrolyte, ionic liquids are presented as an interesting alternative to conventional solvents, since they have high chemical and thermal stability, negligible vapor pressure (increasing safety of the device), intrinsic ionic conductivity, and, especially, wide electrochemical window, this increases the power of the electrochemical capacitor. Thus, we will establish a route to prepare graphene and electrode production with good physical and electrochemical qualities and study its performance in ionic liquids that have being developed in the group, with wide electrochemical window and good transport property to obtain high electrochemical capacitors performance.
News published in Agência FAPESP Newsletter about the scholarship: