The Nanoscale Designing of Electrodes Aiming at the Development of High-Performance Supercapacitors

• Grant number: 21/00726-8
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: May 01, 2022
• End date: June 30, 2024
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Paulo Roberto Bueno
• Grantee: Thamyres Fernandes Messa Moreira
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated research grant: 17/24839-0 - Nanoelectronics and nanoscale electrochemistry: fundaments and applications, AP.TEM

Abstract

The nanoscale design of electrode has emerging as an important way of developing energy storage devices. The main goal of this proposal is to design graphene-based building blocks structures suitably modified with redox moieties. These 2D building blocks (within thickness d 5 nanometers) will serve as base constituents of 3D electrodes aiming at to produce high-performance energy storage devices. Therefore, the major aim of the present proposal is to improve the development of electrodes for advanced supercapacitors devices preparing modified graphene-based nanocomposites with Pyrene (Py) and Ferrocenecarboxylic acid (FCA). For the electric characterization of graphene (Gr) and graphene-oxide (RGO) based composites we will employ both transient and spectroscopic electrochemical methods wherein the phenomena of the supercapacitance will be analysed in detail in a single-graphene layer or single-graphene oxide layer before studying the performance of these composites Py/Gr, Py/RGO, FCA/Gr, and FCA/RGO that will be integrated into 3D electrode format in the final device configuration. This constitutes a methodology to develop cost effective hyper-capacitors (advanced supercapacitors) for energy storage within high energy density per volume and per mass than existing super-capacitors, preserving all the benefits of energy storage in capacitor devices such as long life (based on charge and discharge cycles analysis) and fast charging and discharging regimes.